LM237, LM337 3-TERMINAL ADJUSTABLE REGULATORS SLVS047G – NOVEMBER 1981 – REVISED SEPTEMBER 2003 D D D D INPUT D D LM237, LM337 . . . KC (TO-220) PACKAGE (TOP VIEW) Output Voltage Range Adjustable From –1.2 V to –37 V Output Current Capability of 1.5 A Max Input Regulation Typically 0.01% Per Input-Voltage Change Output Regulation Typically 0.3% OUTPUT INPUT ADJUSTMENT LM337 . . . KTE OR KTP PACKAGE (TOP VIEW) Peak Output Current Constant Over Temperature Range of Regulator OUTPUT INPUT D Ripple Rejection Typically 77 dB Direct Replacement for Industry-Standard LM237 and LM337 INPUT ADJUSTMENT description/ordering information The LM237 and LM337 are adjustable 3-terminal negative-voltage regulators capable of supplying in excess of –1.5 A over an output voltage range of –1.2 V to –37 V. They are exceptionally easy to use, requiring only two external resistors to set the output voltage and one output capacitor for frequency compensation. The current design has been optimized for excellent regulation and low thermal transients. In addition, the LM237 and LM337 feature internal current limiting, thermal shutdown, and safe-area compensation, making them virtually immune to failure by overloads. The LM237 and LM337 serve a wide variety of applications, including local on-card regulation, programmable output-voltage regulation, and precision current regulation. ORDERING INFORMATION –25°C to 150°C 0°C 0 C to 125°C 125 C ORDERABLE PART NUMBER PACKAGE† TJ TOP-SIDE MARKING TO-220 (KC) Tube of 50 LM237KC LM237 PowerFLEX (KTE) Reel of 2000 LM337KTER LM337 PowerFLEX (KTP) Reel of 3000 LM337KTPR L337 TO-220 (KC) Tube of 50 LM337KC LM337 † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PowerFLEX is a trademark of Texas Instruments. Copyright 2003, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 LM237, LM337 3-TERMINAL ADJUSTABLE REGULATORS SLVS047G – NOVEMBER 1981 – REVISED SEPTEMBER 2003 schematic diagram ADJUSTMENT OUTPUT INPUT absolute maximum ratings over operating temperature ranges (unless otherwise noted)† Input-to-output differential voltage, VI – VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40 V Operating virtual junction temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. package thermal data (see Note 1) PACKAGE BOARD PowerFLEX (KTE) High K, JESD 51-5 θJC 3°C/W θJA 23°C/W PowerFLEX (KTP) High K, JESD 51-5 19°C/W 28°C/W TO-220 (KC) High K, JESD 51-5 3°C/W 19°C/W NOTE 1: Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability. recommended operating conditions 2 IO Output current TJ Operating virtual junction temperature MIN MAX |VI – VO| ≤ 40 V, P ≤ 15 W 10 1500 |VI – VO| ≤ 10 V, P ≤ 15 W 6 1500 LM237 –25 150 LM337 0 125 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 UNIT mA °C LM237, LM337 3-TERMINAL ADJUSTABLE REGULATORS SLVS047G – NOVEMBER 1981 – REVISED SEPTEMBER 2003 electrical characteristics over recommended ranges of operating virtual junction temperature (unless otherwise noted) TEST CONDITIONS† PARAMETER Input regulation‡ VI – VO = –3 V to –40 V Ripple rejection VO = –10 V, VO = –10 V, Output regulation LM237 MIN TJ = 25°C TJ = MIN to MAX f = 120 HZ f = 120 HZ, CADJ = 10 µF MAX 0.01 0.02 66 0.3% 0.02 0.01 0.04 0.05 0.02 0.07 60 66 50 0.5% 0.3% 50 70 1% 1.5% Output-voltage long-term drift After 1000 h at TJ = MAX and VI – VO = –40 V 0.3% Output noise voltage f = 10 HZ to 10 kHZ, TJ = 25°C %/V mV 1% |VO| ≥ 5 V 0.6% UNIT dB 77 |VO| ≤ 5 V TJ = MIN to MAX Peak output current MAX 77 Output-voltage change with temperature Minimum output current to maintain regulation TYP 25 |VO| ≥ 5 V IO = 10 mA to 1.5 A MIN 60 |VO| ≤ 5 V IO = 10 mA to 1.5 A, TJ = 25°C LM337 TYP mV 0.6% 1% 0.3% 0.003% 1% 0.003% |VI – VO| ≤ 40 V 2.5 5 2.5 10 |VI – VO| ≤ 10 V 1.2 3 1.5 6 mA |VI – VO| ≤ 15 V |VI – VO| ≤ 40 V, TJ = 25°C 1.5 2.2 1.5 2.2 0.24 0.4 0.15 0.4 Adjustment-terminal current Change in adjustment-terminal current VI – VO = – 2.5 V to –40 V, IO = 10 mA to MAX TJ = 25°C, Reference voltage (output to ADJ) VI – VO = – 3 V to –40 V, IO = 10 mA to 1.5 A, P ≤ rated dissipation TJ = 25°C TJ = MIN to MAX A 65 100 65 100 µA 2 5 2 5 µA –1.225 –1.25 –1.275 –1.213 –1.25 –1.287 –1.2 –1.25 –1.3 –1.2 –1.25 –1.3 V Thermal regulation Initial TJ = 25°C, 10-ms pulse 0.002 0.02 0.003 0.04 %/W † Unless otherwise noted, these specifications apply for the following test conditions |VI – VO| = 5 V and IO = 0.5 A. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. All characteristics are measured with a 0.1-µF capacitor across the input and a 1-µF capacitor across the output. Pulse-testing techniques are used to maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must be taken into account separately. ‡ Input regulation is expressed here as the percentage change in output voltage per 1-V change at the input. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 LM237, LM337 3-TERMINAL ADJUSTABLE REGULATORS SLVS047G – NOVEMBER 1981 – REVISED SEPTEMBER 2003 electrical characteristics, TJ = 25°C TEST CONDITIONS† PARAMETER Input regulation‡ VI – VO = –3 V to –40 V Ripple rejection VO = –10 V, VO = –10 V, Output regulation IO = 10 mA to 1.5 A Output noise voltage f = 10 HZ to 10 kHZ Minimum output current to maintain regulation Peak output current LM237, LM337 MIN f = 120 HZ CADJ = 10 µF, f = 120 HZ Reference voltage (output to ADJ) MAX 0.01 0.04 60 66 50 |VO| ≥ 5 V 0.3% UNIT %/V dB 77 |VO| ≤ 5 V mV 1% 0.003% |VI – VO| ≤ 40 V 2.5 10 |VI – VO| ≤ 10 V 1.5 6 |VI – VO| ≤ 15 V 1.5 2.2 |VI – VO| ≤ 40 V 0.15 0.4 Adjustment-terminal current Change in adjustment-terminal current TYP VI – VO = – 2.5 V to –40 V, VI – VO = – 3 V to –40 V, P ≤ rated dissipation IO = 10 mA to MAX IO = 10 mA to 1.5 A, –1.213 mA A 65 100 µA 2 5 µA –1.25 –1.287 V † Unless otherwise noted, these specifications apply for the following test conditions |VI – VO| = 5 V and IO = 0.5 A. All characteristics are measured with a 0.1-µF capacitor across the input and a 1-µF capacitor across the output. Pulse-testing techniques are used to maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must be taken into account separately. ‡ Input regulation is expressed here as the percentage change in output voltage per 1-V change at the input. 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 LM237, LM337 3-TERMINAL ADJUSTABLE REGULATORS SLVS047G – NOVEMBER 1981 – REVISED SEPTEMBER 2003 APPLICATION INFORMATION LM237 or LM337 OUTPUT INPUT VI VO ADJUSTMENT R1 C1 C2 + + R2 ǒ Ǔ R1 typically is 120 Ω. R2 + R1 –V O –1..25 *1 , where VO is the output in volts. C1 is a 1-µF solid tantalum capacitor required only if the regulator is more than 10 cm (4 in) from the power-supply filter capacitor. C2 is a 1-µF solid tantalum or 10-µF aluminum electrolytic capacitor required for stability. Figure 1. Adjustable Negative-Voltage Regulator LM237 or LM337 RS VI INPUT OUTPUT VO ADJUSTMENT RS = 1.25 V ILIMIT Figure 2. Current-Limiting Circuit POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 PACKAGE OPTION ADDENDUM www.ti.com 19-May-2005 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty LM237KC ACTIVE TO-220 KC 3 LM237KTER OBSOLETE PFM KTE 3 50 Lead/Ball Finish TBD CU SNPB TBD Call TI MSL Peak Temp (3) Level-NC-NC-NC Call TI LM337KC ACTIVE TO-220 KC 3 50 TBD CU SNPB Level-NC-NC-NC LM337KTER ACTIVE PFM KTE 3 2000 TBD CU SNPB Level-1-220C-UNLIM LM337KTPR ACTIVE PFM KTP 2 3000 TBD CU SNPB Level-1-220C-UNLIM LM337KTPRG3 ACTIVE PFM KTP 2 3000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM LM337Y OBSOLETE XCEPT Y 0 Call TI Call TI TBD (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. 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Addendum-Page 1 MECHANICAL DATA MPFM001E – OCTOBER 1994 – REVISED JANUARY 2001 KTE (R-PSFM-G3) PowerFLEX PLASTIC FLANGE-MOUNT 0.375 (9,52) 0.080 (2,03) 0.070 (1,78) 0.365 (9,27) 0.360 (9,14) 0.050 (1,27) 0.040 (1,02) 0.350 (8,89) 0.220 (5,59) NOM 0.010 (0,25) NOM Thermal Tab (See Note C) 0.360 (9,14) 0.350 (8,89) 0.295 (7,49) NOM 0.320 (8,13) 0.310 (7,87) 0.420 (10,67) 0.410 (10,41) 1 3 0.025 (0,63) 0.031 (0,79) 0.100 (2,54) Seating Plane 0.004 (0,10) 0.010 (0,25) M 0.005 (0,13) 0.001 (0,03) 0.200 (5,08) 0.041 (1,04) 0.031 (0,79) 0.010 (0,25) NOM Gage Plane 3°– 6° 0.010 (0,25) 4073375/F 12/00 NOTES: A. B. C. D. E. All linear dimensions are in inches (millimeters). This drawing is subject to change without notice. The center lead is in electrical contact with the thermal tab. Dimensions do not include mold protrusions, not to exceed 0.006 (0,15). Falls within JEDEC MO-169 PowerFLEX is a trademark of Texas Instruments. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 MECHANICAL DATA MPSF001F – JANUARY 1996 – REVISED JANUARY 2002 KTP (R-PSFM-G2) PowerFLEX PLASTIC FLANGE-MOUNT PACKAGE 0.080 (2,03) 0.070 (1,78) 0.243 (6,17) 0.233 (5,91) 0.228 (5,79) 0.218 (5,54) 0.050 (1,27) 0.040 (1,02) 0.010 (0,25) NOM 0.130 (3,30) NOM 0.215 (5,46) NOM 0.247 (6,27) 0.237 (6,02) Thermal Tab (See Note C) 0.287 (7,29) 0.277 (7,03) 0.381 (9,68) 0.371 (9,42) 0.100 (2,54) 0.090 (2,29) 0.032 (0,81) MAX Seating Plane 0.090 (2,29) 0.180 (4,57) 0.004 (0,10) 0.005 (0,13) 0.001 (0,02) 0.031 (0,79) 0.025 (0,63) 0.010 (0,25) M 0.010 (0,25) NOM Gage Plane 0.047 (1,19) 0.037 (0,94) 0.010 (0,25) 2°–ā6° 4073388/M 01/02 NOTES: A. B. C. D. E. All linear dimensions are in inches (millimeters). This drawing is subject to change without notice. The center lead is in electrical contact with the thermal tab. Dimensions do not include mold protrusions, not to exceed 0.006 (0,15). Falls within JEDEC TO-252 variation AC. PowerFLEX is a trademark of Texas Instruments. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. 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