LM237, LM337 3-TERMINAL ADJUSTABLE REGULATORS www.ti.com SLVS047J – NOVEMBER 1981 – REVISED MAY 2007 FEATURES • • • • 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% • Peak Output Current Constant Over Temperature Range of Regulator Ripple Rejection Typically 77 dB Direct Replacement for Industry-Standard LM237 and LM337 • • OUTPUT INPUT ADJUSTMENT LM337...KCS (TO-220) PACKAGE (TOP VIEW) INPUT INPUT LM237, LM337...KC (TO-220) PACKAGE (TOP VIEW) LM337...KTE, KTP, OR KVU PACKAGE (TOP VIEW) INPUT ADJUSTMENT LM337...KTT (TO-263) PACKAGE (TOP VIEW) OUTPUT INPUT INPUT OUTPUT OUTPUT INPUT ADJUSTMENT 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 PACKAGE (1) TJ –25°C to 150°C 0°C to 125°C (1) ORDERABLE PART NUMBER 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 TO-220 – KCS Tube of 50 LM337KCSE3 LM337 TO-252 – KVU Reel of 2500 LM337KVURG3 LM337 TO-263 – KTT Reel of 500 LM337KTTR 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. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 1981–2007, Texas Instruments Incorporated LM237, LM337 3-TERMINAL ADJUSTABLE REGULATORS www.ti.com SLVS047J – NOVEMBER 1981 – REVISED MAY 2007 SCHEMATIC DIAGRAM ADJUSTMENT OUTPUT INPUT Absolute Maximum Ratings (1) over operating temperature ranges (unless otherwise noted) MIN MAX UNIT VI – VO Input-to-output differential voltage –40 V TJ Operating virtual junction temperature 150 °C 260 °C 150 °C Lead temperature Tstg (1) 1,6 mm (1/16 in) from case for 10 s Storage temperature range –65 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 (1) PACKAGE θJC θJA PowerFLEX (KTE) High K, JESD 51-5 3°C/W 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 TO-220 (KCS) High K, JESD 51-5 3°C/W 24.8°C/W TO-252 (KVU) High K, JESD 51-5 TO-263 (KTT) High K, JESD 51-5 (1) 2 BOARD 30.3°C/W 18°C/W 25.3°C/W 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. Submit Documentation Feedback LM237, LM337 3-TERMINAL ADJUSTABLE REGULATORS www.ti.com SLVS047J – NOVEMBER 1981 – REVISED MAY 2007 Recommended Operating Conditions 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 UNIT mA °C Electrical Characteristics over recommended ranges of operating virtual junction temperature (unless otherwise noted) PARAMETER Input regulation (2) Ripple rejection Output regulation TEST CONDITIONS (1) VI – VO = –3 V to –40 V LM237 MIN MAX TJ = 25°C 0.01 TJ = MIN to MAX 0.02 VO = –10 V, f = 120 Hz 66 |VO| ≤ 5 V IO = 10 mA to 1.5 A, TJ = 25°C |VO| ≥ 5 V 0.02 0.01 0.04 0.05 0.02 0.07 60 66 0.3 mV 1 % 50 70 mV |VO| ≥ 5 V 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 0.3 %/V dB 77 50 0.5 UNIT |VO| ≤ 5 V 0.6 0.6 1 0.3 0.003 % 1 0.003 2.5 5 2.5 10 |VI – VO| ≤ 10 V 1.2 3 1.5 6 |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 Change in ADJUSTMENT current VI – VO = –2.5 V to –40 V, IO = 10 mA to MAX, TJ = 25°C Reference voltage (OUTPUT to ADJUSTMENT) VI – VO = –3 V to –40 V, IO = 10 mA to 1.5 A, P ≤ rated dissipation Thermal regulation Initial TJ = 25°C, 10-ms pulse TJ = 25°C TJ = MIN to MAX –1.225 –1.2 % % |VI – VO| ≤ 40 V ADJUSTMENT current (2) MAX 25 TJ = MIN to MAX (1) TYP 77 Output-voltage change with temperature Peak output current MIN 60 VO = –10 V, f = 120 Hz, CADJ = 10 µF IO = 10 mA to 1.5 A Minimum output current to maintain regulation LM337 TYP mA A 65 100 65 100 µA 2 5 2 5 µA –1.25 –1.275 –1.213 –1.25 –1.287 –1.25 –1.3 –1.25 –1.3 0.002 0.02 0.003 0.04 –1.2 V %/W Unless otherwise noted, the following test conditions apply: |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. Submit Documentation Feedback 3 LM237, LM337 3-TERMINAL ADJUSTABLE REGULATORS www.ti.com SLVS047J – NOVEMBER 1981 – REVISED MAY 2007 Electrical Characteristics TJ = 25°C PARAMETER Input regulation (2) Ripple rejection VO = –10 V, f = 120 Hz Output noise voltage f = 10 Hz to 10 kHz 66 |VO| ≥ 5 V 4 0.01 0.04 0.3 mV 1 % % 2.5 10 |VI – VO| ≤ 10 V 1.5 6 1.5 2.2 |VI – VO| ≤ 40 V 0.15 0.4 VI – VO = –2.5 V to –40 V, IO = 10 mA to MAX Reference voltage (OUTPUT to ADJUSTMENT) VI – VO = –3 V to –40 V, IO = 10 mA to 1.5 A, P ≤ rated dissipation –1.213 %/V 50 0.003 |VI – VO| ≤ 15 V UNIT dB 77 |VI – VO| ≤ 40 V Change in ADJUSTMENT current (2) MAX |VO| ≤ 5 V ADJUSTMENT current (1) TYP 60 VO = –10 V, f = 120 Hz, CADJ = 10 µF IO = 10 mA to 1.5 A Peak output current MIN VI – VO = –3 V to –40 V Output regulation Minimum output current to maintain regulation LM237, LM337 TEST CONDITIONS (1) mA A 65 100 µA 2 5 µA –1.25 –1.287 V Unless otherwise noted, the following test conditions apply: |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. Submit Documentation Feedback LM237, LM337 3-TERMINAL ADJUSTABLE REGULATORS www.ti.com SLVS047J – NOVEMBER 1981 – REVISED MAY 2007 APPLICATION INFORMATION LM237 or LM337 INPUT VI OUTPUT VO ADJUSTMENT R1 C1 C2 + + R2 R1 typically is 120 Ω. ǒ R2 + R1 Ǔ –V O *1 –1..25 , 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 Submit Documentation Feedback 5 PACKAGE OPTION ADDENDUM www.ti.com 18-Sep-2007 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty LM237KC NRND TO-220 KC 3 50 Pb-Free (RoHS) CU SN N / A for Pkg Type LM237KCE3 NRND TO-220 KC 3 50 Pb-Free (RoHS) CU SN N / A for Pkg Type LM237KCSE3 ACTIVE TO-220 KCS 3 50 Pb-Free (RoHS) CU SN N / A for Pkg Type LM237KTER OBSOLETE PFM KTE 3 TBD Call TI Call TI LM337KC NRND TO-220 KC 3 50 Pb-Free (RoHS) CU SN N / A for Pkg Type LM337KCE3 NRND TO-220 KC 3 50 Pb-Free (RoHS) CU SN N / A for Pkg Type LM337KCSE3 ACTIVE TO-220 KCS 3 50 Pb-Free (RoHS) CU SN N / A for Pkg Type LM337KTER NRND PFM KTE 3 2000 TBD CU SN Level-3-240C-168 HR LM337KTPR NRND PFM KTP 2 3000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM LM337KTPRG3 NRND PFM KTP 2 3000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM LM337KTTR ACTIVE DDPAK/ TO-263 KTT 3 500 Green (RoHS & no Sb/Br) CU SN Level-3-245C-168 HR LM337KTTRG3 ACTIVE DDPAK/ TO-263 KTT 3 500 Green (RoHS & no Sb/Br) CU SN Level-3-245C-168 HR LM337KVURG3 ACTIVE PFM KVU 3 2500 Green (RoHS & no Sb/Br) CU SN Level-3-260C-168 HR LM337Y OBSOLETE DIESALE Y 0 Call TI Call TI TBD Lead/Ball Finish MSL Peak Temp (3) (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), Pb-Free (RoHS Exempt), 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. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. 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. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on Addendum-Page 1 PACKAGE OPTION ADDENDUM www.ti.com 18-Sep-2007 incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 5-Oct-2007 TAPE AND REEL BOX INFORMATION Device Package Pins Site Reel Diameter (mm) Reel Width (mm) A0 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LM337KTTR KTT 3 SITE 45 330 24 10.6 15.8 4.9 16 24 Q2 LM337KVURG3 KVU 3 SITE 45 330 16 6.9 10.5 2.7 8 16 Q2 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com Device 5-Oct-2007 Package Pins Site Length (mm) Width (mm) Height (mm) LM337KTTR KTT 3 SITE 45 340.0 340.0 38.0 LM337KVURG3 KVU 3 SITE 45 340.0 340.0 38.0 Pack Materials-Page 2 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. 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