XC9128/XC9129 Series ETR0411-011 1 A Driver Transistor Built-In, Step-Up DC/DC Converters ☆GreenOperation Compatible ■GENERAL DESCRIPTION The XC9128/XC9129 series are synchronous step-up DC/DC converters with a 0.2Ω (TYP.) N-channel driver transistor and a synchronous 0.2Ω (TYP.) P-channel switching transistor built-in. A highly efficient and stable current can be supplied up to 1.0A by reducing ON resistance of the built-in transistors. With a high switching frequency of 1.2MHz, a small inductor is selectable making the series ideally suited for applications requiring low profile or space saving solutions. With the MODE pin, the series provides mode selection of PWM control or PFM/PWM automatic switching control. In the PWM/PFM automatic switching mode, the series switches from PWM to PFM to reduce switching loss when load current is small. When load current is large, the series switches automatically to the PWM mode so that high efficiency is achievable over a wide range of load conditions. The series also provides small output ripple from light to large loads by using the built-in circuit which enables the smooth transition between PWM and PFM. With a adaptor enable function of the XC9128 series, when a voltage higher than the input voltage is applied to the output, the input and the output become isolated making it possible for the IC to work in parallel with the likes of an AC adaptor. ■FEATURES ■APPLICATIONS High Efficiency, Large Current Step-Up Converter ●Digital audio equipment Output Current : 150mA＠V =3.3V, V =0.9V OUT IN ●Digital still cameras / Camcorders 500mA＠V =3.3V, V =1.8V OUT IN Input Voltage Range : 0.8V~6.0V ●Computer Mouses Output Voltage Setting : 1.8V~5.3V (Externally set) ●Multi-function power supplies Range Set up freely with a reference voltage supply of 0.45V (±0.010V) & external components Oscillation Frequency : 1.2MHz (Fixed oscillation frequency accuracy ±15%) Input Current : 1.0A Maximum Current Limit : 1.2A (MIN.), 2.0A (MAX.) Control : PWM, PWM/PFM control externally selectable High Speed :100mV @ V =3.3V, OUT Transient Response V =1.8V, I =10mA→100mA IN OUT Protection Circuits : Thermal shutdown Integral latch method (Over current limit) Soft-Start Time : 5ms (TYP.) internally set Ceramic Capacitor Compatible Adaptor Enable Function (XC9128 series) Flag Output (XC9128 series) : Open-drain output Operating Ambient Temperature : - 40℃〜+85℃ Packages : MSOP-10, USP-10B Environmentally Friendly : EU RoHS Compliant, Pb Free ■TYPICAL PERFORMANCE ■TYPICAL APPLICATION CIRCUIT CHARACTERISTICS ●Efficiency vs. Output Current XC9128B45CD V IN CLIN 132 LPBxGATND MVOOUDFBTE 1890 MODE CFB RFB1 (cerCaVLmOicUT) 10900 L=4.7μH(LTRFFB510=22V27O-0ULkTCΩ=)3,C,.R3LVF=B,3V20=Eμ4N=3F6kΩ(VL,MV,CKFOF2B=1=O21BP2pJEF1N,0C,6VINKA=EG1N /0×=μ03VF) 80 EFON 54 FEON AAGENND/ 67 RFB2 FFI (%) 6700 1.8V 3.0V E y: 50 nc 40 e Effici 30 20 10 PWM/PFM (VMODE=0V) 0 PWM (VMODE=VOUT) 0.1 1 10 100 1000 Output Current: I (mA) OUT 1/26

XC9128/XC9129 Series ■PIN CONFIGURATION FO 5 6 AEN/ EN 4 7 AGND PGND 1 10 VOUT BAT 3 8 FB Lx 2 9 MODE Lx 2 9 MODE BAT 3 8 FB EN 4 7 AGND PGND 1 10 VOUT FO 5 6 AEN/ USP-10B (BOTTOM VIEW) MSOP-10 XC9128 Series (TOP VIEW) NC 5 6 NC EN 4 7 AGND BAT 3 8 FB Lx 2 9 MODE PGND 1 10 VOUT USP-10B (BOTTOM VIEW) XC9129 Series ■PIN ASSIGNMENT PIN NUMBER USP-10B* USP-10B* PIN NAME FUNCTION MSOP-10* (XC9128) (XC9129) 1 1 1 PGND Power Ground 2 2 2 Lx Output of Internal Power Switch 3 3 3 BAT Battery Input 4 4 4 EN Chip Enable 5 5 - FO Flag Output 6 6 - AEN/ Adaptor Enable 7 7 7 AGND Analog Ground 8 8 8 FB Output Voltage Monitor 9 9 9 MODE Mode Switch 10 10 10 VOUT Output Voltage - - 5, 6 NC No Connection *For MSOP-10 and USP-10B packages, please short the GND pins (pins 1 and 7). *The dissipation pad for the USP-10B package should be solder-plated following the recommended mount pattern and metal masking so as to enhance mounting strength and heat release. If the pad needs to be connected to other pins, it should be connected to the Ground pins (pins 1 and 7). 2/26

XC9128/XC9129 Series ■FUNCTION CHART 1. EN, AEN/ Pin Function ●XC9128 Series EN PIN AEN/ PIN FB PIN VOLTAGE IC OPERATIONAL STATE SOFT-START FUNCTION L→H L - Operation Available H H→L Lower than 0.45×0.8V Operation Available H H→L Higher than 0.45×0.95V Operation Not Available Step-Up Operation H H - - Shut-Down L L - Disable - L H - Disable - * Do not leave the EN and AEN/ Pins open. ●XC9129 Series EN PIN IC OPERATIONAL STATE H Operation L Disable * Do not leave the EN Pin open. 2. MODE Pin Function ●XC9128/XC9129 Series MODE PIN FUNCTION H PWM Control L PWM/PFM Automatic Switching Control 3/26

XC9128/XC9129 Series ■PRODUCT CLASSIFICATION ●Ordering Information XC9128①②③④⑤⑥-⑦ (*1)・・・・Adaptor Chip Enable Pin and Flag Output Pin are added DESIGNATOR ITEM SYMBOL DESCRIPTION B With integral protection ① Integral Protection D Without integral protection Fixed reference voltage 0.45Ｖ ②③ Reference Voltage 45 ②=4, ③=5 ④ Oscillation Frequency C 1.2MHz AR MSOP-10 (1,000/Reel) ⑤⑥-⑦(*1) Packages AR-G MSOP-10 (1,000/Reel) (Order Unit) DR USP-10B (3,000/Reel) DR-G USP-10B (3,000/Reel) XC9129①②③④⑤⑥-⑦ (*1)・・・・Adaptor Chip Enable Pin and Flag Output Pin are not added DESIGNATOR ITEM SYMBOL DESCRIPTION With integral protection B ① Integral Protection (under development) D Without integral protection Fixed reference voltage 0.45Ｖ ②③ Reference Voltage 45 ②=4, ③=5 ④ Oscillation Frequency C 1.2MHz Package DR USP-10B (3,000/Reel) ⑤⑥-⑦(*1) (Order Unit) DR-G USP-10B (3,000/Reel) (*1) The “-G” suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant. 4/26

XC9128/XC9129 Series ■BLOCK DIAGRAM ●XC9128 Series * XC9129 Series The XC9129 series does not have AEN/ pin and FO pin. ■ABSOLUTE MAXIMUM RATINGS Ta=25℃ PARAMETER SYMBOL RATINGS UNITS VOUT Pin Voltage VOUT - 0.3〜6.5 V AEN/ Pin Voltage (*2) VAEN/ - 0.3〜6.5 V FO Pin Voltage (*2) VFO - 0.3〜6.5 V FO Pin Current (*2) IFO 10 mA FB Pin Voltage VFB - 0.3〜6.5 V BAT Pin Voltage VBAT - 0.3〜6.5 V MODE Pin Voltage VMODE - 0.3〜6.5 V EN Pin Voltage VEN - 0.3〜6.5 V LX Pin Voltage VLx - 0.3〜VOUT+0.3 V LX Pin Current ILx 2000 mA MSOP-10 350 (*1) Power Dissipation Pd mW USP-10B 150 Operating Ambient Temperature Topr - 40〜+85 oC Storage Temperature Tstg - 55〜+125 oC AGND, PGND is the standard voltage for all of voltages. *1: When implemented on a PCB. *2: The XC9129 series does not have AEN/ pin and FO pin. These pins are available only in the XC9128 series. 5/26

XC9128/XC9129 Series ■ELECTRICAL CHARACTERISTICS XC9128/XC9129 Series Topr=25 oC PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS CIRCUIT Input Voltage VIN - - - 6.0 V - V =V =3.3V, V =0V (*8) OUT IN FO FB Voltage VFB Voltage to start oscillation during 0.44 0.45 0.46 V ④ V = 0.46V → 0.44V FB Output Voltage Setting Range VOUTSET - 1.8 - 5.3 V ① Connect to external components, - - 0.8 V ① R =1kΩ Operation Start Voltage VST1 L Connect to external components, - - 0.9 (*1) V ① R =33Ω L Voltage to start oscillation during Oscillation Start Voltage VST2 - 0.8 - V ① V =0V → 1V, R =1kΩ IN L Operation Hold Voltage VHLD Connect to external components, RL=1kΩ - 0.7 - V ① Supply Current 1 IDD1 VIN = VOUT =3.3V, VFB=0.45V×0.9 - 3 6 mA ② Supply Current 2 (XC9128) VIN = VOUT =3.3V - 30 80 IDD2 VFB=0.45V×1.1 (Oscillation stop), μA ② Supply Current 2 (XC9129) V =0V - 28 78 MODE Input Pin Current I V =3.3V, V =1.8V, V =0V - 2 10 μA ③ BAT IN OUT EN Stand-by Current I V = V =3.3V, V =0V - 2 10 μA ② STB IN OUT EN Oscillation Frequency f VIN = VOUT =3.3V, VFO=0V (*8), 1.02 1.20 1.38 MHz ④ OSC V =0.45V×0.9 FB V = V =3.3V, V =0V (*8), Maximum Duty Cycle MAXDTY IN OUT FO 85 92 96 % ④ VFB=0.45V×0.9 V = V =3.3V, V =0V (*8), Minimum Duty Cycle MINDTY IN OUT FO - - 0 % ④ V =0.45V×1.1 FB Connect to external components, PFM Switching Current IPFM V =0V, R =330Ω - 250 400 mA ① MODE L Connect to external components, Efficiency (*2) EFFI - 93 - % ① R =33Ω L LX SW "Pch" ON Resistance RLxP VVINF=BV=L0x.=4V5VOU×T+15.10 m(*3V) , - 0.20 0.35 (*1) Ω ⑤ LX SW "Nch" ON Resistance RLxN VIN=VOUT=3.3V, Lx =50mV (*4) - 0.20 (*1) 0.35 (*1) Ω ⑦ LX Leak Current ILXL VIN=VOUT= VLX, VFB=0V - 1 - μA ⑤ Current Limit (*5) ILIM VOUT>2.5V 1.2 1.5 2.0 A ① Time to stop oscillation during Integral Latch Time (XC9128) (*6) tLAT RL=33Ω → 3.3Ω, VFO=L → H - 3.5 - ms ① Integral Latch Time (XC9129) (*6) Time to stop oscillation during R =33Ω → 3.3Ω L Time to start oscillation during V =0V EN Soft-Start Time 1 tSS1 → VIN at VIN = VOUT =3.3V, VFO=0V, 1.7 5.3 10.5 ms ④ V =0.45V×0.95 FB V = V =3.3V, V =0V, IN OUT FO V =0.45V×0.95 Soft-Start Time 2 (*7) tSS2 FB - 0.02 0.04 ms ④ Time to start oscillation during VAEN/=VIN→0V. V = V =3.3V, V =0V, IN OUT FO V =0.45V×0.8 Soft-Start Time 3 (*7) tSS3 FB 1.7 5.3 10.5 ms ④ Time to start oscillation during V =V →0V AEN/ IN Thermal Shutdown TTSD - - 150 - oC - Temperature Hysteresis Width THYS - - 20 - oC - V =3.3V Output Voltage Drop IN Protection (*6) VLVP Voltage to stop oscillation during 1.3 1.48 1.56 V ⑥ V =1.56V→1.3V OUT FO Output Current (*7) IFO_OUT VIN =VOUT=3.3V, VFO=0.25V 1.3 1.7 2.2 mA ④ FO Leakage Current (*7) IFO_Leak VIN = VOUT =3.3V, VEN=0V ,VFO=1V - 0 1 μA ④ 6/26

XC9128/XC9129 Series ■ELECTRICAL CHARACTERISTICS (Continued) ●XC9128/XC9129 Series (Continued) Topr=25oC PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS CIRCUIT V =V =3.3V, V =0V (*8) IN OUT FO EN "H" Voltage VENH Voltage to start oscillation during 0.65 - 6.0 V ④ V =0.45V×0.9, V = 0.2V→0.65V FB EN V = V =3.3V, V =0V (*8) IN OUT FO EN "L" Voltage VENL Voltage to stop oscillation during - - 0.2 V ④ VFB=0.45V×0.9, VEN= 0.65V→0.20V MODE "H" Voltage VMODEH RL =330Ω, Voltage operates at PWM control 0.65 - 6.0 V ① MODE "L" Voltage VMODEL RL =330Ω, Voltage operates at PFM control AGND - 0.2 V ① V = V =3.3V, V =0V AEN/ Voltage (*7) VAEN/ IN OUT FO 0.7 0.8 0.9 V ④ Voltage to start oscillation during V = 0.9V→0.7V AEN/ EN "H" Current IENH VIN=VOUT=VFB=VEN=6.0V - - 0.1 μA ② EN "L" Current IENL VIN=VOUT=VFB=6.0V, VEN=0V -0.1 - - μA ② MODE "H" Current IMODEH VIN=VOUT=VFB=VMODE=6.0V - - 0.1 μA ② MODE "L" Current IMODEL VIN=VOUT=VFB=6.0V, VMODE=0V -0.1 - - μA ② AEN/ "H" Current (*7) IAEN/H VIN=VOUT=VFB=VAEN/=6.0V - - 0.1 μA ② AEN/ "L" Current (*7) IAEN/L VIN=VOUT=6.0V, VEN=0V, VAEN/=0V -0.1 - - μA ② FB "H" Current IFBH VIN=VOUT=VFB=6.0V - - 0.1 μA ② FB "L" Current IFBL VIN=VOUT=6.0V, VFB=0V -0.1 - - μA ② Test Conditions: For the Circuit No.1, unless otherwise stated, V =1.8V, V =V =V =3.3V, V =0V （*8） IN EN MODE FO AEN/ For the Circuit No.2, unless otherwise stated, V =1.8V, V =0V, V =V =3.3V, V =0V （*8） IN FB EN MODE AEN/ For the Circuit No.3, unless otherwise stated, V =1.8V, V =V =V =3.3V, FB=0V IN OUT EN MODE For the Circuit No.4, unless otherwise stated, V =1.8V, V =0V, V =V =Vpull=V =3.3V, V =0V （*8） IN FB EN MODE FO AEN/ For the Circuit No.5, unless otherwise stated, V =3.3V, V =0V （*8） IN AEN/ For the Circuit No.6, unless otherwise stated, VEN=VMODE=Vpull=VFO=3.3V, VFB=0V （*8） For the Circuit No.7, unless otherwise stated, VEN=VMODE=3.3V External Components: For the Circuit No.1, RFB1=270kΩ, RFB2=43kΩ, CFB=12pF, L=4.7μH（LTF5022 TDK）, CL1=22μF（ceramic）, CL2=10μF（ceramic）, CIN=10μF（ceramic） For the Circuit No.2,3, C =1μF（ceramic） IN For the Circuit No.4,6, C =1μF（ceramic）, Rpull=300Ω IN For the Circuit No.5, C =1μF（ceramic）, C =1μF（ceramic） IN OUT For the Circuit No.7, C =1μF（ceramic）, C =1μF（ceramic）, SBD =XBS304S17（TOREX）, Rpull=0.5Ω IN OUT *1 : Designed value *2 : Efficiency ={(output voltage) X (output current)} ÷ {(input voltage) X (input current)} X 100 *3 : L SW "P-ch" ON resistance=（V -V pin test voltage）÷100mA X Lx OUT *4 : Testing method of LX SW "N-ch" ON resistance is stated at test circuits. *5 : Current flowing through the Nch driver transistor is limited. *6 : The XC9128D/XC9129D series does not have integral latch protection and VLVP function. This is only available with the XC9128B/XC9129B series. *7 : The XC9129 series does not have FO and AEN/ pins. These pins are only available in the XC9128 series. *8 : The XC9129 series does not have FO and AEN/ pins. The AEN/FO functions are only effective for the test of the XC9128 series. 7/26

XC9128/XC9129 Series ■TYPICAL APPLICATION CIRCUIT <Output Voltage Setting> Output voltage can be set by adding external split resistors. Output voltage is determined by the following equation, based on the values of RFB1 and RFB2. The sum of RFB1 and RFB2 should normally be 500kΩ or less. VOUT=0.45 × (RFB1 + RFB2) / RFB2 The value of CFB, speed-up capacitor for phase compensation, should be fZFB = 1 / (2 x π x CFB1 x RFB1) which is in the range of 10 kHz to 60 kHz. Adjustments are depending on application, inductance (L), load capacitance (CL) and dropout voltage. [Example of calculation] When RFB1=270kΩ, RFB2=43kΩ, VOUT1 = 0.45 × (270k+43k ) / 43k = 3.276V [Typical example] VOUT (V) RFB1 (kΩ) RFB2 (kΩ) CFB (pF) 1.8 300 100 10 2.5 270 59 12 3.3 270 43 12 5.0 180 17.8 15 [External Components] 1.2MHz: L : 4.7μH (LTF5022-4R7-LC TDK) : 4.7μH (CDRH4D28C-4R7N SUMIDA) CL1 : 22μF (ceramic) CL2 : 10μF (ceramic) CIN : 10μF (ceramic) * C should be selected in 10μF or higher. L1 Capacitance C + C is recommended 30μF or higher. (Ceramic capacitor compatible) L1 L2 If C is lower than 10μF, operation may be unstable. L1 In case of the usage C + C ＜30μF, output ripple may increase so that we recommend that you fully L1 L2 check actual performance on the board. * If using Tantalum or Electrolytic capacitors please be aware that ripple voltage will be higher due to the larger ESR (Equivalent Series Resistance) values of those types of capacitors. Please also note that the IC’s operation may become unstable with such capacitors so we recommend that you fully check actual performance. 8/26

XC9128/XC9129 Series ■OPERATIONAL EXPLANATION The XC9128/XC9129 series consists of a reference voltage source, ramp wave circuit, error amplifier, PWM comparator, phase compensation circuit, N-channel driver transistor, P-channel synchronous rectification switching transistor and current limiter circuit. The error amplifier compares the internal reference voltage with the FB pin feed back voltage via resistors RFB1 and RFB2. Phase compensation is performed on the resulting error amplifier output, to input a signal to the PWM comparator to determine the turn-on time of the N-channel driver transistor during PWM operation. The PWM comparator compares, in terms of voltage level, the signal from the error amplifier with the ramp wave from the ramp wave circuit, and delivers the resulting output to the buffer driver circuit to cause the Lx pin to output a switching duty cycle. This process is continuously performed to ensure stable output voltage. The current feedback circuit monitors the N-channel driver transistor’s turn-on current for each switching operation, and modulates the error amplifier output signal to provide multiple feedback signals. This enables a stable feedback loop even when a low ESR capacitor, such as a ceramic capacitor, is used, ensuring stable output voltage. <Reference Voltage Source> The source provides the reference voltage to ensure stable output of the DC/DC converter. <Ramp Wave Circuit> The ramp wave circuit determines switching frequency. The frequency is fixed internally at 1.2MHz. The Clock generated is used to produce ramp waveforms needed for PWM operation, and to synchronize all the internal circuits. <Error Amplifier> The error amplifier is designed to monitor output voltage. The amplifier compares the reference voltage with the feedback voltage divided by the internal resistors (RFB1 and RFB2). When the FB pin is lower than the reference voltage, output voltage of the error amplifier increases. The gain and frequency characteristics of the error amplifier are optimized internally. < Maximum Current Limit> The current limiter circuit monitors the maximum current flowing through the N-channel driver transistor connected to the Lx pin, and features a combination of the current limit and latch function. 1When the driver current is greater than a specific level (equivalent to peak coil current), the maximum current limit function starts to operate and the pulses from the Lx pin turn off the N-channel driver transistor at any given time. 2When the driver transistor is turned off, the limiter circuit is then released from the maximum current limit detection state. 3At the next pulse, the driver transistor is turned on. However, the transistor is immediately turned off in the case of an over current state. 4 When the over current state is eliminated, the IC resumes its normal operation. The XC9128B/XC9129B series waits for the over current state to end by repeating the steps 1 through 3. If an over current state continues for several ms and the above three steps are repeatedly performed, the IC performs the function of latching the OFF state of the N-channel driver transistor, and goes into operation suspension mode. After being put into suspension mode, the IC can resume operation by turning itself off once and then re-starting via the EN pin, or by restoring power to the V IN pin. The XC9128D/XC9129D series does not have this latch function, so operation steps 1 through 3 repeat until the over current state ends. Integral latch time may be released from a over current detection state because of the noise. Depending on the state of a substrate, it may result in the case where the latch time may become longer or the operation may not be latched. Please locate a n input capacitor as close as possible. Limit<# ms Limit<# ms 9/26

XC9128/XC9129 Series ■OPERATIONAL EXPLANATION (Continued) <Thermal Shutdown> For protection against heat damage, the thermal shutdown function monitors chip temperature. When the chip’s temperature reaches 150OC (TYP.), the thermal shutdown circuit starts operating and the driver transistor will be turned off. At the same time, the output voltage decreases. When the temperature drops to 130OC (TYP.) after shutting off the current flow, the IC performs the soft start function to initiate output startup operation. <MODE> The MODE pin operates in PWM mode by applying a high level voltage and in PFM/PWM automatic switching mode by applying a low level voltage. <Shut-Down> The IC enters chip disable state by applying low level voltage to the EN pin. At this time, the P-ch synchronous switching transistor turns on when VIN>VOUT and vise versa the transistor turns off when VIN<VOUT. <Adaptor Enable> While the XC9128 series using step-up DC/DC converters in parallel with an added power source such as AC adaptors, the circuit needs the step-up DC/DC converter to be transient-efficient for sustaining output voltage in case the added power source runs down. The AEN/ pin voltage determines whether the added power source is supplied or not so that high-speed following operation is possible. The IC starts operating although the driver transistor is off when a high level voltage is applied to the AEN/ pin after a high level voltage is also applied to the EN pin. If the AEN/ pin voltage changes from high level to low level while the EN pin sustains a high level voltage, the step-up operation starts with high-speed following mode (without soft-start). The XC9129 series does not have adaptor enable function. <Error Flag > For the XC9128 series, the FO pin becomes high impedance during over current state, over temperature state, soft-start period, and shut-down period. The XC9129 series does not have flag out function. ■NOTE ON USE 1. Please do not exceed the stated absolute maximum ratings values. 2. The DC/DC converter / controller IC's performance is greatly influenced by not only the ICs' characteristics, but also by those of the external components. Care must be taken when selecting the external components. 3. Make sure that the PCB GND traces are as thick as possible, as variations in ground potential caused by high ground currents at the time of switching may result in instability of the IC. 4. Please mount each external component as close to the IC as possible and use thick, short traces to reduce the circuit impedance. 5. When the device is used in high step-up ratio, the current limit function may not work during excessive load current. In this case, the maximum duty cycle limits maximum current. 6. When the adaptor enable function is used in the below circuit, please use a diode with low reverse bias current. The sum of R ’s and R ’s resistance should be set to manage the reverse bias current. AEN1 AEN2 10/26

XC9128/XC9129 Series ■NOTE ON USE (Continued) 7. P-ch synchronous switching transistor operation The parasitic diode of the P-ch synchronous transistor is placed between Lx (anode) and V (cathode), so that the OUT power line can not be turned off from Lx to V . On the other hand, the power line switch from V to Lx is shown in the OUT OUT table below. ●XC9128 Series EN Pin AEN/Pin P-channel Synchronous Switch Transistor Operation H H OFF H L Switching L H OFF L L Undefined ●XC9129 Series EN Pin P-channel Synchronous Switch Transistor Operation H Switching L Undefined With the XC9128B/XC9129B series, when step-up operation stops as a result of the latch condition working when the maximum current limit level is reached, the synchronous P-channel transistor will remain ON. 8. The maximum current limiter controls the limit of the N-channel driver transistor by monitoring current flow. This function does not limit the current flow of the P-channel synchronous transistor. 9. The integral latch time of the XC9128B/XC9129B series could be released from the maximum current detection state as a result of board mounting conditions. This may extend integral latch time or the level required for latch operation to function may not be reached. Please connect the output capacitor as close to the IC as possible. 10. With the XC9128B/XC9129B series, when the EN pin is left open or applied in the range of 0.2V〜0.65V, the integral latch or the V may not be able to release. Please make sure that the EN pin voltage is less than 0.2V or more than LVP 0.65V, or use the XC9128D/XC9129D series which does not have the integral latch and the LVP functions. 11. With the XC9128B/XC9129B series, please make the V pin voltage become more than 1.5V within the soft-start time, OUT otherwise the V is detected. Also, the operation may become unstable, please test and verify the operation in the LVP actual circuits thoroughly before use. 12. When used in small step-up ratios, the device may skip pulses during PWM control mode. 11/26

XC9128/XC9129 Series ■TEST CIRCUITS *1 < Circuit No.1 > Wave Form Measure Point L Lx VOUT CFB A BAT MODE RFB1 AVINV CIN VEN 10kΩ EN FB CL2 VMODE CL1 RL V ※LCE I Nx t::e 1r4n0.a7uluF CH (o(cLmeTrpaFom5n0iec2n)2tsT-4R7N2R0 : TDK) FO AEN/ V RFB2 CL1 : 22uF (ceramic) VFO VAEN/ CL2: 10uF (ceramic) PGND AGND Wave Form Measure Point < Circuit No.2 > < Circuit No.3 > Lx VOUT Lx VOUT A BAT MODE A A BAT MODE A EN FB A VMODE EN FB VOUT CIN CIN VIN FB VIN VMODE FO AEN/ A FO AEN/ VEN VAEN/ VEN VFB PGND AGND PGND AGND ※ External Components CIN : 1uF (ceramic) ※ External Components CIN : 1uF (ceramic) < Circuit No.4 > <Circuit No.5 > Wave Form Measure Point Rpull Lx VOUT Lx VOUT Vpull A BAT MODE BAT MODE A VIN CIN EN FB VMODE CIN EN FB COUTVOUT VEN FB VLx VFB VAEN/ A FO AEN/ FO AEN/ VFO VAEN/ VIN PGND AGND PGND AGND ※ External Components CIN : 1uF (ceramic) ※ External Components CIN : 1uF (ceramic) Rpull : 300Ω COUT : 1uF (ceramic) <Circuit No.6 > <Circuit No.7 > Wave Form Measure Point Wave Form Measure Point Rpull Lx VOUT Lx VOUT V1 Vpull SBD Rpull A BAT MODE BAT MODE Vpull VIN CIN EN FB VOUTV CLX CIN EN FB VEN VMODE VIN COUT VOUT A FO AEN/ FO AEN/ VFO FB VEN VMODE PGND AGND PGND AGND ※ External Components CIN : 1uF (ceramic) ※ External Components CIN : 1uF (ceramic) Rpull : 300Ω COUT : 1uF (ceramic) SBD : XBS304S17(TOREX) Rpull : 0.5Ω Measurement method for ON resistance of the Lx switch Using the layout of circuit No.7 above, set the L pin voltage to 50mV by adjusting the Vpull voltage whilst the N-ch driver X transistor is turned on. Then, measure the voltage difference between both ends of Rpull. ON Resistance is calculated by using the following formula: RLXN=0.05 ÷ ((V1 – 0.05) ÷ 0.5) where V1 is a voltage between SBD and Rpull. L pin voltage and V1 are measured by an oscilloscope. X *1: The XC9129 series does not have the AEN/ pin and the FO pin. When the XC9129 series is measured, the FO and AEN pins are not effective in the above mentioned test circuits, they are NC. 12/26

XC9128/XC9129 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (1) Efficiency vs. Output Current XC9128 (V =3.3V) XC9128 (V =5.0V) OUT OUT L=4.7μH(LTF5022-LC),CL=30μF(LMK212BJ106KG ×3) L=4.7μH(LTF5022-LC),CL=30μF(LMK212BJ106KG ×3) VEN=6V,VFO=OPEN,VAEN/=0V VEN=6V,VFO=OPEN,VAEN/=0V 100 RFB1=270kΩ,RFB2=43kΩ,CFB=12pF,CIN=10μF 100 RFB1=180kΩ,RFB2=18kΩ,CFB=15pF,CIN=10μF 90 90 80 80 FFI (%) 6700 3.0V FFI(%) 6700 3.0V4.2V ency: E 4500 1.8V ency: E 4500 1.8V Effici 2300 VIN=0.8V Effici 2300 VIN=0.8V 10 PWM/PFM(VMODE=0V) 10 PWM/PFM(VMODE=0V) PWM(VMODE=VOUT) PWM(VMODE=VOUT) 0 0 0.1 1 10 100 1000 0.1 1 10 100 1000 Output Current: I (mA) Output Current: I (mA) OUT OUT XC9128 (V =1.8V) OUT L=4.7μH(LTF5022-LC),CL=20μF(LMK212BJ106KG ×2) VEN=6V,VFO=OPEN,VAEN/=0V 100 RFB1=300kΩ,RFB2=100kΩ,CFB=10pF,CIN=10μF 90 80 %) 70 FFI ( 60 1.5V y: E 50 1.2V c n 40 e Effici 30 VIN=0.8V 20 PWM/PFM(V =0V) 10 MODE PWM(V =V ) 0 MODE OUT 0.1 1 10 100 1000 Output Current: I (mA) OUT 13/26

XC9128/XC9129 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (2) Output Voltage vs. Output Current VMODE=VOUT(PWM),VEN=6V,VFO=OPEN,VAEN/=0V VMODE=0V(PWM/PFM),VEN=6V,VFO=OPEN,VAEN/=0V L=4.7μH(LTF5022-LC),RFB1=270kΩ,RFB2=43kΩ L=4.7μH(LTF5022-LC),RFB1=270kΩ,RFB2=43kΩ 3.5 CL=30μF(LMK212BJ106KG ×3),CFB=12pF,CIN=10μF 3.5 CL=30μF(LMK212BJ106KG ×3),CFB=12pF,CIN=10μF V) V) V (OUT 3.4 V =0.8V,1.8V,3.0V V (OUT 3.4 3.0V VIN=0.8V,1.8V ge: 3.3 IN ge : 3.3 a a olt olt V V ut ut utp 3.2 utp 3.2 O O 3.1 3.1 0.1 1 10 100 1000 0.1 1 10 100 1000 Output Current: I (mA) Output Current: I (mA) OUT OUT VMODE=VOUT(PWM),VEN=6V,VFO=OPEN,VAEN/=0V VMODE=0V(PWM/PFM),VEN=6V,VFO=OPEN,VAEN/=0V L=4.7μH(LTF5022-LC),RFB1=180kΩ,RFB2=18kΩ L=4.7μH(LTF5022-LC),RFB1=180kΩ,RFB2=18kΩ 5.2 CL=30μF(LMK212BJ106KG ×3),CFB=15pF,CIN=10μF 5.2 CL=30μF(LMK212BJ106KG ×3),CFB=15pF,CIN=10μF V) V) V (OUT 5.1 V =0.8V,1.8V,3.3V,4.2V V (OUT 5.1 V =0.8V,1.8V,3.3V,4.2V age: 5 IN age: 5 IN olt olt V V ut ut Outp 4.9 Outp 4.9 4.8 4.8 0.1 1 10 100 1000 0.1 1 10 100 1000 Output Current: I (mA) Output Current: I (mA) OUT OUT VMODE=VOUT(PWM),VEN=6V,VFO=OPEN,VAEN/=0V VMODE=0V(PWM/PFM),VEN=6V,VFO=OPEN,VAEN/=0V L=4.7μH(LTF5022-LC),RFB1=300kΩ,RFB2=100kΩ L=4.7μH(LTF5022-LC),RFB1=300kΩ,RFB2=100kΩ 2.0 CL=20μF(LMK212BJ106KG ×2),CFB=10pF,CIN=10μF 2.0 CL=20μF(LMK212BJ106KG ×2),CFB=10pF,CIN=10μF V (V)OUT 1.9 VIN=0.8V,1.2V,1.5V V (V)OUT 1.9 VIN=0.8V,1.2V,1.5V Voltage: 1.8 Voltage: 1.8 utput 1.7 utput 1.7 O O 1.6 1.6 0.1 1 10 100 1000 0.1 1 10 100 1000 Output Current: I (mA) Output Current: I (mA) OUT OUT 14/26

XC9128/XC9129 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (3) Ripple Voltage vs. Output Current XC9128 (VOUT=3.3V) XC9128 (VOUT=3.3V) L=4.7μH(LTF5022-LC),CL=30μF(LMK212BJ106KG ×3) L=4.7μH(LTF5022-LC),CL=20μF(LMK212BJ106KG ×2) VEN=6V,VFO=OPEN,VAEN/=0V VEN=6V,VFO=OPEN,VAEN/=0V 100 RFB1=270kΩ,RFB2=43kΩ,CFB=12pF,CIN=10μF 100 RFB1=270kΩ,RFB2=43kΩ,CFB=12pF,CIN=10μF PWM/PFM(VMODE=0V) PWM/PFM(VMODE=0V) Vp-p) 80 V =0.8V,1.8V,3.0VPWM(VMODE=VOUT) mVp-p) 80 V =0.8V,1.8V,3.0VPWM(VMODE=VOUT) m IN IN e: Vr ( 60 0.8V 1.8V 3.0V ge: Vr ( 60 0.8V 1.8V 3.0V g a olta 40 Volt 40 Ripple V 20 Ripple 20 0 0 0.1 1 10 100 1000 0.1 1 10 100 1000 Output Current: I (mA) Output Current: I (mA) OUT OUT XC9128 (VOUT=3.3V) XC9128 (VOUT=3.3V) L=10μH(LTF5022-LC),CL=30μF(LMK212BJ106KG ×3) L=10μH(LTF5022-LC),CL=20μF(LMK212BJ106KG ×2) VEN=6V,VFO=OPEN,VAEN/=0V VEN=6V,VFO=OPEN,VAEN/=0V 100 RFB1=270kΩ,RFB2=43kΩ,CFB=12pF,CIN=10μF 100 RFB1=270kΩ,RFB2=43kΩ,CFB=12pF,CIN=10μF PWM/PFM(VMODE=0V) PWM/PFM(VMODE=0V) Vp-p) 80 VIN=0.8V,1.8V,3.0VPWM(VMODE=VOUT) Vp-p) 80 VIN=0.8V,1.8V,3.0VPWM(VMODE=VOUT) m m Vr ( 60 0.8V 1.8V 3.0V Vr ( 60 3.0V e: e: 0.8V 1.8V g g olta 40 olta 40 e V e V ppl 20 ppl 20 Ri Ri 0 0 0.1 1 10 100 1000 0.1 1 10 100 1000 Output Current: I (mA) Output Current: I (mA) OUT OUT XC9128 (VOUT=5.0V) XC9128(VOUT=1.8V) L=4.7μH(LTF5022-LC),CL=30μF(LMK212BJ106KG ×3) L=4.7μH(LTF5022-LC),CL=20μF(LMK212BJ106KG ×2) VEN=6V,VFO=OPEN,VAEN/=0V VEN=6V,VFO=OPEN,VAEN/=0V 100 RFB1=180kΩ,RFB2=18kΩ,CFB=15pF,CIN=10μF 100 RFB1=300kΩ,RFB2=100kΩ,CFB=10pF,CIN=10μF PWM/PFM(VMODE=0V) PWM/PFM(VMODE=0V) p) 80 PWM(VMODE=VOUT) p) 80 PWM(VMODE=VOUT) Vp- VIN=0.8V,1.8V,3.3V,3.6V Vp- VIN=0.8V,1.2V,1.5V m m e: Vr ( 60 0.8V 1.8V 3.3V 3.6V e: Vr ( 60 0.8V 1.2V 1.5V g g olta 40 olta 40 e V e V ppl 20 ppl 20 Ri Ri 0 0 0.1 1 10 100 1000 0.1 1 10 100 1000 Output Current : I (mA) Output Current: I (mA) OUT OUT 15/26

XC9128/XC9129 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (4) Supply Current 1 vs. Ambient Temperature (5) Supply Current 1 vs. Output Voltage XC9128/29 XC9128/29 10 VBAT=VOUT,VFB=0V,VEN=3.3V 10 VBAT=VOUT,VFB=0V,VEN=3.3V Supply current1: I (mA)DD1 2468 4.0V 5.0V VOUT=6.0V Supply current1: I (mA)DD1 2468 85℃Ta=-4025℃℃ 1.8V 2.5V 3.3V 0 0 -50 -25 0 25 50 75 100 1 2 3 4 5 6 Ambient Temperature: Ta (℃) Output Voltage : V (V) OUT (6) Supply Current 2 vs. Ambient Temperature (7) Supply Current 2 vs. Output Voltage XC9128 XC9128 80 VBAT=VOUT,VFB=VEN=3.3V 80 VBAT=VOUT,VFB=VEN=3.3V A) A) μnt2 : I (DD2 4600 VOUT=6.0V μnt2 : I (DD2 4600 85℃ 25℃ urre urre pply c 20 1.8V 3.3V pply c 20 Ta=-40℃ u u S S 0 0 -50 -25 0 25 50 75 100 1 2 3 4 5 6 Ambient Temperature: Ta (℃) Output Voltage : V (V) OUT (8) Standby Current vs. Ambient Temperature (9) Standby Current vs. Output Voltage XC9128/29 XC9128/29 10 VBAT=VOUT,VEN=0V 10 VBAT=VOUT,VEN=0V μA) 8 A) 8 ( μ Current : I STB 46 VOUT=6.0V urrent : I (STB 46 85℃ 25℃ Ta=-40℃ by y C and 2 3.3V ndb 2 St Sta 1.8V 0 0 -50 -25 0 25 50 75 100 1 2 3 4 5 6 Ambient Temperature: Ta (℃) Output Voltage : V (V) OUT 16/26

XC9128/XC9129 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (10) FB Voltage vs. Ambient Temperature (11) FB Voltage vs. Output Voltage XC9128/29 XC9128/29 0.460 VBAT=VOUT,VEN=3.3V 0.460 VBAT=VOUT,VEN=3.3V V) V) e: V (FB 0.455 6.0V e: V (FB 0.455 25℃ g g a a olt 0.450 olt 0.450 k V k V edbac 0.445 VOUT=1.8V,3.3V edbac 0.445 Ta=-40℃ Fe Fe 85℃ 0.440 0.440 -50 -25 0 25 50 75 100 1 2 3 4 5 6 Ambient Temperature: Ta (℃) Output Voltage: V (V) OUT (12) Oscillation Frequency vs. Ambient Temperature (13) Oscillation Frequency vs. Output Voltage XC9128/29 XC9128/29 1600 VBAT=VOUT,VEN=VMODE=3.3V,VFB=0V,Rpull=200Ω 1600 VBAT=VOUT,VEN=VMODE=3.3V,VFB=0V,Rpull=200Ω z) z) y : f (kHOSC 111345000000 3.3V VOUT=1.8V y : f (kHOSC 111345000000 85℃ enc 1200 enc 1200 u u n Freq 1100 5.5V n Freq 1100 25℃ Ta=-40℃ atio 1000 atio 1000 scill 900 scill 900 O O 800 800 -50 -25 0 25 50 75 100 1 2 3 4 5 6 Ambient Temperature: Ta (℃) Output Voltage: V (V) OUT (14) Maximum Duty Cycle vs. Ambient Temperature (15) Maximum Duty Cycle vs. Output Voltage XC9128/29 XC9128/29 %) 100 VBAT=VOUT,VEN=3.3V,VFB=0V,Rpull=200Ω 　%). 100 VBAT=VOUT,VEN=3.3V,VFB=0V,Rpull=200Ω Y ( VOUT=1.8V Y ( DT 96 DT 96 Ta=-40℃ X X A A Duty Cycle: M 8982 5.5V 3.3V Duty Cycle: M 8982 25℃ 85℃ mum 84 mum 84 Maxi 80 Maxi 80 -50 -25 0 25 50 75 100 1 2 3 4 5 6 Ambient Temperature: Ta (℃) Output Voltage: V (V) OUT 17/26

XC9128/XC9129 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (16) PFM Switch Current vs. Ambient Temperature XC9128 (V =5.0V) XC9128 (V =3.3V) OUT OUT L=4.7μH(LTF5022-LC),CL=30μF(LMK212BJ106KG ×3) L=4.7μH(LTF5022-LC),CL=30μF(LMK212BJ106KG ×3) IOUT=10mA,VEN=6V,VMODE=VAEN/=0V IOUT=10mA,VEN=6V,VMODE=VAEN/=0V 400 RFB1=180kΩ,RFB2=18kΩ,CFB=15pF,CIN=10μF 400 RFB1=270kΩ,RFB2=43kΩ,CFB=12pF,CIN=10μF A) 350 VIN=0.9V A) 350 VIN=0.9V m m (M 300 (M 300 F F nt : I P 250 1.8V,3.3V,4.2V nt : I P 250 1.8V,2.4V urre 200 urre 200 C C h 150 h 150 witc 100 witc 100 S S M M F 50 F 50 P P 0 0 -50 -25 0 25 50 75 100 -50 -25 0 25 50 75 100 Ambient Temperature: Ta (℃) Ambient Temperature: Ta (℃) XC9128 (V =1.8V) OUT L=4.7μH(LTF5022-LC),CL=30μF(LMK212BJ106KG ×3) IOUT=10mA,VEN=6V,VMODE=VAEN/=0V 450 RFB1=300kΩ,RFB2=100kΩ,CFB=15pF,CIN=10μF mA) 400 VIN=0.9V (M 350 F ent : I P 235000 1.5V urr 200 C h 150 c wit 100 S M 50 F P 0 -50 -25 0 25 50 75 100 Ambient Temperature: Ta (℃) (17) PFM Switch Current vs. Output Voltage XC9128 (V =0.9V) XC9128 (V =1.5V) IN IN L=4.7μH(LTF5022-LC),CL=30μF(LMK212BJ106KG ×3) L=4.7μH(LTF5022-LC),CL=30μF(LMK212BJ106KG ×3) 450 IOUT=10mA,VEN=6V,VMODE=VAEN/=0V,CIN=10μF 450 IOUT=10mA,VEN=6V,VMODE=VAEN/=0V,CIN=10μF mA) 400 Ta=-40℃ mA) 400 Ta=-40℃ witch Current : I (PFM 122335050500000 25℃ 85℃ witch Current : I (PFM 122335050500000 25℃ 85℃ M S 100 M S 100 PF 50 PF 50 0 0 1 2 3 4 5 6 1 2 3 4 5 6 Output Voltage: V (V) Output Voltage: V (V) OUT OUT 18/26

XC9128/XC9129 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (18) Limit Current vs. Ambient Temperature (19) Limit Current vs. Output Voltage XC9128/29 XC9128/29 2200 VOUT=5V,VEN=VMODE=3.3V,VFB=0V,Rpull=200Ω 2200 VOUT=5V,VEN=VMODE=3.3V,VFB=0V,Rpull=200Ω 2000 2000 A) A) m m 　mit Current : I (LIM 111468000000 3.3V 4.2V mit Current : I (LIM 111468000000 Ta=-40℃ Li 1200 VBAT=1.8V Li 1200 25℃ 85℃ 1000 1000 -50 -25 0 25 50 75 100 0 1 2 3 4 5 6 Ambient Temperature: Ta (℃) Supply Voltage: V (V) BAT (20) Lx SW”Pch”ON Resistance vs. Ambient Temperature (21) Lx SW”Pch”ON Resistance vs. Output Voltage XC9128/29 XC9128/29 0.40 VOUT+50mV=VBAT=VLx,VFB=0V 0.40 VBAT=VLx=VOUT+50mV,VFB=0V Ω) Ω) Lx SW"Pch"ON Resistance: R (LxP 00000000........0011223305050505 VOU6T.=01V.8V 3.3V Lx SW"Pch"ON Resistance: R (LxP 00000000........0011223305050505 25℃ Ta=-40℃85℃ -50 0 50 100 1 2 3 4 5 6 Ambient Temperature: Ta (℃) Output Voltage: VOUT (V) (22) Lx SW”Nch”ON Resistance vs. Ambient Temperature (23) Lx SW”Nch”ON Resistance vs. Output Voltage XC9128/29 XC9128/29 R (Ω)LxN 00..3305 VOUTV=O1UT.=8VVBAT,VLx=50mV,VFB=0V R (Ω)LxN 00..3305 VOUT=VBAT,VLx=50mV,VFB=0V nce: 0.25 3.3V nce: 0.25 85℃ a a esist 0.20 esist 0.20 N R 0.15 N R 0.15 O O h" 0.10 h" 0.10 25℃ c 6.0V c W"N 0.05 W"N 0.05 Ta=-40℃ S S Lx 0.00 Lx 0.00 -50 -25 0 25 50 75 100 1 2 3 4 5 6 Ambient Temperature: Ta (℃) Output Voltage: V (V) OUT 19/26

XC9128/XC9129 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (24) Soft Start Time 1 vs. Ambient Temperature (25) Soft Start Time 1 vs. Output Voltage XC9128/29 XC9128/29 10.0 VBAT=VOUT,VFB=VFO=0V,VEN=0V→VBAT 10.0 VBAT=VOUT,VFB=VFO=0V,VEN=0V→VBAT me : t (ms)SS1 68..00 4.2V 3.3V me : t (ms)SS1 68..00 Ta=-40℃ Ti Ti Soft Start 4.0 VOUT=0.9V 1.8V Soft Start 4.0 25℃ 85℃ 2.0 2.0 -50 -25 0 25 50 75 100 1 2 3 4 5 6 Ambient Temperature: Ta (℃) Output Voltage: VOUT (V) (26) Flag Output Current vs. Ambient Temperature (27) Flag Output Current vs. Output Voltage XC9128 XC9128 2.5 VOUT=VBAT,VEN=VMODE=3.3V,VFO=0.25V,VFB=VAEN/=0V 2.5 VOUT=VBAT,VEN=VMODE=3.3V,VFO=0.25V,VFB=VAEN/=0V mA) 6.0V mA) Ta=-40℃ (OUT 2.0 (OUT 2.0 Current: I FO_ 11..05 3.3V V =1.8V Current : I FO_ 11..05 25℃ 85℃ Output 0.5 OUT Output 0.5 Flag Flag 0.0 0.0 -50 -25 0 25 50 75 100 1 2 3 4 5 6 Ambient Temperature: Ta (℃) Output Voltage : V (V) OUT (28) Flag Leakage Current vs. Ambient Temperature (29) Flag Leakage Current vs. Output Current XC9128 XC9128 1.0 VBAT=VOUT=VMODE=3.3V,VFB=VAEN/=VEN=0V 0.10 VBAT=VOUT=VMODE=3.3V,VFB=VAEN/=VEN=0V A) A) μ 0.9 μ 0.09 (O_Leak 00..78 (O_Leak 00..0078 nt: I F 0.6 nt: I F 0.06 Curre 00..45 Curre 00..0045 e e ag 0.3 ag 0.03 k k Ta=-40℃,25℃,85℃ Lea 0.2 VFO=3.3V,6.0V Lea 0.02 g 0.1 g 0.01 a a Fl 0.0 Fl 0.00 -50 0 50 100 0 1 2 3 4 5 6 Ambient Temperature: Ta (℃) Flag Output Voltage: V (V) FO 20/26

XC9128/XC9129 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (30) Low Voltage Protection Voltage vs. Ambient Temperature XC9128 V) 1.60 VBAT=1.2V,VEN=VMODE=3.3V,VAEN/=VFB=0V (P V VL 1.55 e: g olta 1.50 V n o 1.45 cti e Prot 1.40 e g a 1.35 olt V w 1.30 o L -50 -25 0 25 50 75 100 Ambient Temperature: Ta (℃) (31) EN ”H” Voltage vs. Ambient Temperature (32) EN ”H” Voltage vs. Output Voltage XC9128/29 XC9128/29 0.65 VBAT=VOUT,VFB=0V 0.65 VBAT=VOUT,VFB=0V 0.60 0.60 V) 0.55 V) 0.55 Ta=-40℃ V (ENH 0.50 V (ENH 0.50 ge: 0.45 ge: 0.45 olta 0.40 olta 0.40 V V H" 0.35 VOUT=1.8V,3.3V,5.0V H" 0.35 25℃ 85℃ N " 0.30 N " 0.30 E E 0.25 0.25 0.20 0.20 -50 -25 0 25 50 75 100 1 2 3 4 5 6 Ambient Temperature: Ta(℃) Output Voltage: V (V) OUT (33) EN ”L” Voltage vs. Ambient Temperature (34) EN ”L” Voltage vs. Output Voltage XC9128/29 XC9128/29 0.65 VBAT=VOUT,VFB=0V 0.65 VBAT=VOUT,VFB=0V 0.60 0.60 V) 0.55 V) 0.55 Ta=-40℃ V (ENL 0.50 V (ENL 0.50 EN "L" Voltage: 0000....33440505 VOUT=1.8V,3.3V,5.0V EN "L" Voltage: 0000....33440505 25℃ 85℃ 0.25 0.25 0.20 0.20 -50 -25 0 25 50 75 100 1 2 3 4 5 6 Ambient Temperature: Ta(℃) Output Voltage: V (V) OUT 21/26

XC9128/XC9129 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (35) MODE”H”Voltage vs. Ambient Temperature (36) MODE”H”Voltage vs. Output Voltage XC9128/29 XC9128/29 L=4.7μH(CDRH4D28C),CL=30μF(LMK212BJ106KG ×3) L=4.7μH(CDRH4D28C),CL=30μF(LMK212BJ106KG ×3) 0.65 IOUT=10mA,VEN=3.3V,VAEN/=0V,CIN=10μF 0.65 IOUT=10mA,VEN=3.3V,VAEN/=0V,CIN=10μF V) 0.60 V) 0.60 (ODEH 0.55 (ODEH 0.55 Ta=-40℃ e : V M 00..4550 e : V M 00..4550 g g a a H" Volt 00..3450 VOUT=1.8V,3.3V,5.0V H" Volt 00..3450 25℃ 85℃ DE " 0.30 DE " 0.30 O O M 0.25 M 0.25 0.20 0.20 -50 -25 0 25 50 75 100 1 2 3 4 5 6 Ambient Temperature: Ta (℃) Output Voltage: VOUT (V) (37) MODE”L”Voltage vs. Ambient Temperature (38) MODE”L”Voltage vs. Output Voltage XC9128/29 XC9128/29 L=4.7μH(CDRH4D28C),CL=30μF(LMK212BJ106KG ×3) L=4.7μH(CDRH4D28C),CL=30μF(LMK212BJ106KG ×3) 0.65 IOUT=10mA,VEN=3.3V,VAEN/=0V,CIN=10μF 0.65 IOUT=10mA,VEN=3.3V,VAEN/=0V,CIN=10μF (V)ODEL 00..5650 (V)ODEL 00..5650 e : V M 00..4550 e : V M 00..4550 Ta=-40℃ g g a a olt 0.40 olt 0.40 V V L" 0.35 V =1.8V,3.3V,5.0V L" 0.35 25℃ DE " 0.30 OUT DE " 0.30 85℃ O O M 0.25 M 0.25 0.20 0.20 -50 -25 0 25 50 75 100 1 2 3 4 5 6 Ambient Temperature: Ta (℃) Output Voltage: V (V) OUT (39) AEN/Voltage vs. Ambient Temperature (40) AEN/Voltage vs. Output Voltage XC9128 XC9128 0.90 VBAT=VOUT,VEN=3.3V,VFB=0V 0.9 VBAT=VOUT,VEN=3.3V,VFB=0V (V)EN/ 0.85 6.0V (V)AEN/ 0.85 25℃ A V e: V 0.80 ge: 0.8 oltag VOUT=1.8V,3.3V Volta Ta=-40℃ 85℃ EN/ V 0.75 AEN/ 0.75 A 0.70 0.7 -50 -25 0 25 50 75 100 1 2 3 4 5 6 Output Voltage: V (V) Ambient Temperature: Ta (℃) OUT 22/26

XC9128/XC9129 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (41) Load Transient Response XC9128B45CDR(PWM Control) XC9128B45CDR(PWM/PFM Automatic Switching Control) VIN=1.8V,VOUT=3.3V,IOUT=10mA⇔100mA VIN=1.8V,VOUT=3.3V,IOUT=10mA⇔100mA L=4.7μH(LTF5022-LC),CL=30μF(LMK212BJ106KG ×3) L=4.7μH(LTF5022-LC),CL=30μF(LMK212BJ106KG ×3) RFB1=270kΩ,RFB2=43kΩ,CFB=56pF,CIN=10μF RFB1=270kΩ,RFB2=43kΩ,CFB=56pF,CIN=10μF 3.4 VEN=VMODE=3.3V,VAEN/=0V,Ta=25℃ 3.4 VEN=3.3V,VMODE=VAEN/=0V,Ta=25℃ V(V)OUT 3.3 Output Voltage V(V)OUT 3.3 Output Voltage Voltage: 3.2 Voltage: 3.2 put 3.1 put 3.1 Out 100mA Out 100mA 3.0 3.0 10mA Output Current 10mA Output Current 2.9 2.9 Time(400μsec/div) Time(400μsec/div) XC9128B45CDR(PWM Control) XC9128B45CDR(PWM/PFM Automatic Switching Control) VIN=3.0V,VOUT=5.0V,IOUT=10mA⇔100mA VIN=3.0V,VOUT=5.0V,IOUT=10mA⇔100mA L=4.7μH(LTF5022-LC),CL=30μF(LMK212BJ106KG ×3) L=4.7μH(LTF5022-LC),CL=30μF(LMK212BJ106KG ×3) RFB1=330kΩ,RFB2=30kΩ,CFB=47pF,CIN=10μF RFB1=330kΩ,RFB2=30kΩ,CFB=47pF,CIN=10μF 5.1 VEN=VMODE=5.0V,VAEN/=0V,Ta=25℃ 5.1 VEN=5.0V,VMODE=VAEN/=0V,Ta=25℃ V(V)OUT 5.0 Output Voltage V(V)OUT 5.0 Output Voltage Voltage: 4.9 Voltage: 4.9 put 4.8 put 4.8 Out 100mA Out 100mA 4.7 4.7 10mA Output Current 10mA Output Current 4.6 4.6 Time(400μsec/div) Time(400μsec/div) XC9128B45CDR(PWM Control) XC9128B45CDR(PWM/PFM Automatic Switching Control) VIN=3.0V,VOUT=5.0V,IOUT=10mA⇔300mA VIN=3.0V,VOUT=5.0V,IOUT=10mA⇔300mA L=4.7μH(LTF5022-LC),CL=30μF(LMK212BJ106KG ×3) L=4.7μH(LTF5022-LC),CL=30μF(LMK212BJ106KG ×3) RFB1=330kΩ,RFB2=30kΩ,CFB=47pF,CIN=10μF RFB1=330kΩ,RFB2=30kΩ,CFB=47pF,CIN=10μF 5.2 VEN=VMODE=5.0V,VAEN/=0V,Ta=25℃ 5.2 VEN=5.0V,VMODE=VAEN/=0V,Ta=25℃ (V)T 5.0 Output Voltage (V)T 5.0 Output Voltage U U VO VO age: 4.8 age: 4.8 olt olt V V put 4.6 put 4.6 Out 300mA Out 300mA 4.4 4.4 10mA Output Current 10mA Output Current 4.2 4.2 Time(400μsec/div) Time(400μsec/div) 23/26

XC9128/XC9129 Series ■PACKAGING INFORMATION ●MSOP-10 ●USP-10B 24/26

XC9128/XC9129 Series ■MARKING RULE ●USP-10B ① represents product series. MARK PRODUCT SERIES 8 XC9128 series 9 XC9129 series ② represents transistor built-in, output voltage freely set (FB voltage), integral protection type. MARK PRODUCT SERIES ●MSOP-10 B With integral protection D Without integral protection ③④ represents reference voltage. MARK VOLTAGE(V) ③ ④ 4 5 0.45 ⑤ represents oscillation frequency. MARK OSCILLATION FREQUENCY C 1200 ⑥⑦ represents production lot number 01 to 09, 10 to 99, 0A~ 0Z, 1A ~9Z,A0~Z9,AA~ZZ in order. (G, I, J, O, Q, W excluded) *No character inversion used 25/26

XC9128/XC9129 Series マーク① 1. The products and product specifications contained herein are subject to change without 製品シリーズを表す notice to improve performance characteristics. Consult us, or our representatives シンボル 製品 before use, to confirm that t8h e informXaCt9io12n8 inシ リthーis ズda tas heet is up to date. 9 XC9129シリーズ 2. We assume no responsibility for any infringement of patents, patent rights, or other rights arising from the use of any information and circuitry in this datasheet. マーク② 3. Please ensure suitableT rs内h蔵ip、pi出ng力 電c圧on任tr意ol設s 定((iFnBcl品ud)、in積g 分f保ai護l-s有a無feを 表deすs igns and aging protection) are in force foシrン eボquルip ment emタplイoyプin g produ cts listed in this datasheet. B 積分保護あり 4. The products in this datasheet are not developed, designed, or approved for use with D 積分保護無し such equipment whose failure of malfunction can be reasonably expected to directly endanger the life of, orマ cーauクs③e ,s④ig nificant injury to, the user. 基準電圧値を表す (e.g. Atomic energy; aerospace; transport; combustion and associated safety シンボル 電圧(V) equipment thereof.) ③ ④ 5. Please use the products list4e d in this da5ta sheet withi0n. 4t5h e speci fied ranges. Should you wish to use the products under conditions exceeding the specifications, マーク⑤ please consult us or our representatives. 発振周波数を表す 6. We assume no responシsibンilボityル f or da発m振ag周e波 o数r l(okHssz) due t o abnormal use. 7. All rights reserved. No partC o f this datash1e2e0t0 may be c opied or reproduced without the prior permission of TOREX SEMICONDUCTOR LTD. マーク⑥,⑦ 製造ロットを表す 01、…、09、10、11、…、99、0A、…、0Z、1A、…、9Z、 A0、…、Z9、 AA、…、ZZを順番とする。 (但し、G，I，J，O，Q，Wは除く。反転文字は使用しない。) 26/26