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K A 3 3 September 2014 7 / L M 3 3 7 KA337 / LM337 — 3 3-Terminal 1.5 A Negative Adjustable Regulator - T e r m i n a l Features Description 1 . 5 • Output-Current in Excess of 1.5 A The KA337 / LM337 are 3-terminal negative adjustable A • Output-Adjustable Between -1.25 V and -37 V regulators. They supply in excess of 1.5 A over an output N voltage range of -1.25 V to -37 V. These regulators • Internal Thermal Overload Protection e require only two external resistors to set the output volt- g • Internal Short-Circuit Current Limiting a age and employ current limiting, thermal overload protec- t • Output-Transistor Safe Area Compensation tion, and safe area compensation. iv e • Floating Operation for High-Voltage Applications A • Standard 3-Pin TO-220 Package TO-220 d Input ju s t a b l e 1 R e 1. Adj 2. Input 3. Output g u l a Ordering Information to r Product Number Package Packing Method Operating Temperature KA337TU TO-220 (Dual Gauge) Rail 0°C to +125°C LM337T TO-220 (Single Gauge) Block Diagram V adj 1 3 Output Voltage - Reference + Protection Circuitry 2 Input Figure 1. Block Diagram © 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com KA337 / LM337 Rev. 1.1.1

K A Absolute Maximum Ratings 3 3 7 Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be opera- / ble above the recommended operating conditions and stressing the parts to these levels is not recommended. In addi- L tion, extended exposure to stresses above the recommended operating conditions may affect device reliability. The M absolute maximum ratings are stress ratings only. Values are at T = 25°C unless otherwise noted. 3 A 3 7 Symbol Parameter Value Unit — IVI - VOI Input-Output Voltage Differential 40 V 3 - P Power Dissipation Internally Limited W T D e RθJC Thermal Resistance, Junction to Case 4 °C/W rm T Operating Temperature Range 0 to +125 °C in OPR a TSTG Storage Temperature Range -65 to +125 °C l 1 . 5 A N Electrical Characteristics e g V - V = 5 V, I = 40 mA, 0°C ≤ T ≤ +125°C, P = 20 W; unless otherwise specified. a I O O J DMAX t i v Symbol Parameter Conditions Min. Typ. Max. Unit e T = +25°C, A A 0.01 0.04 d Rline Line Regulation(1) 3 V ≤ I VI - VO I ≤ 40 V %/ V ju 3 V ≤ I V - V I ≤ 40 V 0.02 0.07 s I O t a T = +25°C, b A 15 50 l Rload Load Regulation(1) 10 mA ≤ IO ≤ 0.5 A mV e R 10 mA ≤ IO ≤ 1.5 A 15 150 e g IADJ Adjustable Pin Current 50 100 μA u l T = +25°C, a A t ΔI Adjustable Pin Current Change 10 mA ≤ I ≤ 1.5 A, 2 5 μA o ADJ O r 3 V ≤ I V - V I ≤ 40 V I O T =+25°C -1.213 -1.250 -1.287 A VREF Reference Voltage 3 V ≤ I VI - VO I ≤ 40 V, -1.200 -1.250 -1.300 V 10 mA ≤ I ≤ 1.5 A O ST Temperature Stability 0°C ≤ T ≤ +125°C 0.6 % T J Minimum Load Current to Maintain 3 V ≤ I VI - VO I ≤ 40 V 2.5 10.0 I mA L(MIN) Regulation 3 V ≤ I V - V I ≤ 10 V 1.5 6.0 I O T =+25°C, e RMS Noise, % of V A 0.003 % N OUT 10 Hz ≤ f ≤ 10 kHz V = -10 V, f = 120 Hz 60 O RR Ripple Rejection Ratio dB C = 10 μF(2) 66 77 ADJ ST Long-Term Stability T = 125°C, 1000 Hours 0.3 1.0 % J Notes: 1. Load and line regulation are specified at constant junction temperature. Change in V due to heating effects must be O taken into account separately. Pulse testing with low duty is used. 2. C , when used, is connected between the adjustment pin and ground. ADJ © 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com KA337 / LM337 Rev. 1.1.1 2

K A Typical Performance Characteristics 3 3 7 / L M 0.07 50 3 VIN = -8 V to -45 V VIN = -6.25 V IO = 10 mA to 0.5 A 3 R - Line Regulatoion (%)LINE000000......000000123456 IVOO =UT 4 = m -5A V DMTMyaainptxa::: s -00h..0e01e4t specs at 25 oC [%] R - Load Regulatoion (mV)Load12340000 VIDMTMOyOa ai=npUtxaT ::1: s -=105h5 0-em 1 mem.A2tV V 5stop V e1c.s5 aVt 25 oC [%] IO = 10 mA to 1.5 A 7 — 3-Terminal 1 . 0.00 0 5 -40 -20 0 20 40 60 80 100 120 -40 -20 0 20 40 60 80 100 120 A TA - Temperature[oC] TA - Temperature[oC] N Figure 2. Line Regulation vs. Temperature Figure 3. Load Regulations vs. Temperature e g a t i v e 100 10 A μnt (A) 80 VIOI =- V4O0 =m 5A V μnt (A) 8 VIOI =- V1O0 =m 3A Vto t o1 .450 V V VVVVIIII ---- VVVVOOOO ==== 43330 VVV V ,tt ooI,O I O44= 00= 1 VV10,,0 mII OOmA ==A t11 ot0. o51 m .1A5.A 5A A djus e e urr urr ta able Pin C 4600 able Pin C 46 DMTyainpts:: h2e μeAt specs at 25 oC ble R st st Max: 5 μA e dju Datasheet specs at 25 oC [%] dju g I - AADJ 20 MTMyainpx::: -5100 0μ AμA I - AADJ 2 ulat o 0 -40 -20 0 20 40 60 80 100 120 0 -40 -20 0 20 40 60 80 100 120 r T - Temperature[oC] T - Temperature[oC] A A Figure 4. Adjustable Pin Current vs. Temperature Figure 5. Adjustable Pin Current Change vs. Temperature 1.30 10 μstable Pin Current (A) 111...222468 VIOI =- V1O0 =m 3A Vto t o1 .450 V V VVVVVIIIII ----- VVVVVOOOOO ===== 4433500 VVV VV,,, III,,OOO II OO=== == 114 .10015. 05m m Am AAAA mmum Load Current [A] 468 VI DMTM- yaVianptxs::O: h 2 1=e.05e 3tmm s AAVpe tcos 40 V VVV II =-- VV3 OOV == 1400 VV Adju Mini I - ADJ1.22 DMTMyaainptxs::: h 111e...22e215t8 3 s7V p VVecs at 25 oC I - LMIN 2 1.20 0 -40 -20 0 20 40 60 80 100 120 -40 -20 0 20 40 60 80 100 120 T - Temperature[oC] T - Temperature[oC] A A Figure 6. Reference Voltage vs. Temperature Figure 7. Minimum Load Current vs. Temperature © 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com KA337 / LM337 Rev. 1.1.1 3

K A Typical Performance Characteristics 3 3 7 / 80 L V-V = 5V -45 M 70 I O -02255 80 VOUT = -10 V w/o C 33 60 5815500 o (dB) 75 CADJ = 10 μF with CAADDJJ 7 — e - Noise Voltage (uVrms)N 23450000 125 RR - Ripple Rejection Rati 56675050 DMTMwMTyyaiiaitnnpphtxa:::: : Cs 667h6A07De dJddeBBBt specs w/o CADJ 3-Terminal 1 Max: 10 50 .5 -40 -20 0 20 40 60 80 100 120 A 010 100 1000 104 TA - Temperature[oC] N Bandwidth F requency (Hz) e g Figure 8. Noise Voltage vs. Temperature Figure 9. Ripple Rejection vs. Temperature a t i v e A 0.9 3.5 d A) 0.8 VVIO -U TV =O G= N40D V TMTeyinps::t 00s.p.02e85c sAA at 25 oC [%] μA) VI - VO = 5 V TMTeyinps::t 12s.p.55e AcAs at 25 oC jus Current ( 00..67 Max: 0.9 A Current ( 3.0 Max: 3.5 A table Circuit 0.5 ble Pin 2.5 Re I - Short SCC000...234 I - AdjustaADJ2.0 gulator 0.1 1.5 -40 -20 0 20 40 60 80 100 120 -40 -20 0 20 40 60 80 100 120 T - Temperature[oC] T - Temperature[oC] A A Figure 10. Short-Circuit Currents vs. Temperature Figure 11. Peak Current vs. Temperature © 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com KA337 / LM337 Rev. 1.1.1 4

K A Typical Application 3 3 7 / L M I PROG 3 3 R2 + 7 CI(3) + C o (4) — 1 μF 1 μF 3 Iadj R1 -T 120 Ω er m Vadj i n -VI VI K A337 / LM337 VO -VO al 1 . 5 A Figure 12. Typical Application N Notes: e 3. C is required if regulator is located more then 4 inches from power supply filter. g I a 1.0 μF solid tantalum or 10 μF aluminum electrolytic is recommended. t i v 4. C is necessary for stability. 1.0 μF solid tantalum or 10 μF aluminum electrolytic is recommended. e O V = -1.25 V (1 + R / R ). A O 2 1 d j u s t a b l e R e g u l a t o r © 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com KA337 / LM337 Rev. 1.1.1 5

K A Physical Dimensions 3 3 7 / L M 3 3 7 — 3 - T e r m i n a l 1 . 5 A N e g a t i v e A d j u s t a b l e R e g u l a t o r Figure 13. TO-220, MOLDED, 3LEAD, JEDEC VARIATION AB © 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com KA337 / LM337 Rev. 1.1.1 6

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