LM337L www.ti.com SNVS780D – MAY 1998 – REVISED MAY 2013 LM337L 3-Terminal Adjustable Regulator Check for Samples: LM337L FEATURES 1 • • • • • • • • • • • 2 Adjustable Output Down to 1.2V Ensured 100mA Output Current Line Regulation Typically 0.01%/V Load Regulation Typically 0.1% Current Limit Constant With Temperature Eliminates the Need to Stock Many Voltages Standard 3-Lead Transistor Package 80 dB Ripple Rejection Output is Short Circuit Protected Available in the 6-Bump DSBGA Package See AN-1112 (Literature Number SNVA009) for DSBGA Considerations DESCRIPTION The LM337L is an adjustable 3-terminal negative voltage regulator capable of supplying 100mA over a 1.2V to 37V output range. It is exceptionally easy to use and requires only two external resistors to set the output voltage. Furthermore, both line and load regulation are better than standard fixed regulators. Also, the LM337L is packaged in a standard TO-92 transistor package which is easy to use. In addition to higher performance than fixed regulators, the LM337L offers full overload protection. Included on the chip are current limit, thermal overload protection and safe area protection. All overload protection circuitry remains fully functional even if the adjustment terminal is disconnected. Normally, only a single 1μF solid tantalum output capacitor is needed unless the device is situated more than 6 inches from the input filter capacitors, in which case an input bypass is needed. A larger output capacitor can be added to improve transient response. The adjustment terminal can be bypassed to achieve very high ripple rejection ratios which are difficult to achieve with standard 3-terminal regulators. Besides replacing fixed regulators, the LM337L is useful in a wide variety of other applications. Since the regulator is “floating” and sees only the input-tooutput differential voltage, supplies of several hundred volts can be regulated as long as the maximum input-to-output differential is not exceeded. Also, it makes an especially simple adjustable switching regulator, a programmable output regulator, or by connecting a fixed resistor between the adjustment and output, the LM337L can be used as a precision current regulator. Supplies with electronic shutdown can be achieved by clamping the adjustment terminal to ground which programs the output to 1.2V where most loads draw little current. The LM337L is available in a standard TO-92 transistor package, SO-8 surface mount package, and in our new 12 mil diameter bump DSBGA package. The LM337L is rated for operation over a −25°C to +125°C range. For applications requiring greater output current in excess of 0.5A and 1.5A, see LM137 series data sheets. For the positive complement, see series LM117 and LM317L data sheets. Typical Application 1.2V-25V Adjustable Regulator 1 2 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. All trademarks are the property of their respective owners. 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 © 1998–2013, Texas Instruments Incorporated LM337L SNVS780D – MAY 1998 – REVISED MAY 2013 www.ti.com Connection Diagrams 3-Pin TO92 8-Pin SOIC Figure 1. Bottom View Figure 2. Top View 6-Bump DSBGA NC A2 2 ADJ B2 NC C2 A1 B1 C1 OUT NC IN Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM337L LM337L www.ti.com SNVS780D – MAY 1998 – REVISED MAY 2013 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) (2) Power Dissipation Internally Limited Input–Output Voltage Differential Operating Junction 40V −25°C to +125°C Temperature Range −55°C to +150°C Storage Temperature Lead Temperature (Soldering, 10 sec.) 300°C Plastic Package (Soldering 4 sec.) 260°C 1.5kV (3) ESD Rating (1) (2) (3) “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not ensure specific performance limits. If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and specifications. Human body model, 1.5kΩ in series with 100pF. Electrical Characteristics (1) Typ Max Units Line Regulation Parameter TA = 25°C, 3V ≤ |VIN − VOUT| ≤ 40V (2) Conditions Min 0.01 0.04 %/V Load Regulation TA = 25°C, 5mA ≤ IOUT ≤ IMAX (2) 0.1 0.5 % Thermal Regulation TA = 25°C, 10ms Pulse 0.04 0.2 %/W 50 100 μA 0.2 5 μA 1.25 1.30 V 0.02 0.07 %/V 0.3 1.5 % 5 mA Adjustment Pin Current Adjustment Pin Current Change 5mA ≤ IL ≤ 100mA 3V ≤ |VIN − VOUT| ≤ 40V Reference Voltage 3V ≤ |VIN − VOUT| ≤ 40V (3) 10mA ≤ IOUT ≤ 100mA, P ≤ 625mW Line Regulation 3V ≤ |VIN − VOUT| ≤ 40V (2) 1.20 (2) Load Regulation 5mA ≤ IOUT ≤ 100mA Temperature Stability TMIN ≤ Tj ≤ TMAX 0.65 Minimum Load Current |VIN − VOUT| ≤ 40V 3.5 3V ≤ |VIN − VOUT| ≤ 15V Current Limit 2.2 3.5 mA 3V ≤ |VIN − VOUT| ≤ 13V 100 200 320 mA |VIN − VOUT| = 40V 25 50 120 mA Rms Output Noise, % of VOUT TA = 25°C, 10Hz ≤ f ≤ 10kHz Ripple Rejection Ratio VOUT = −10V, F = 120 Hz, CADJ = 0 CADJ = 10μF Long-Term Stability (1) (2) (3) % 66 TA = 125°C 0.003 % 65 dB 80 0.3 dB 1 % Unless otherwise specified, these specifications apply −25°C ≤ TJ ≤ + 125°C for the LM337L; |VIN − VOUT| = 5V and IOUT = 40mA. Although power dissipation is internally limited, these specifications are applicable for power dissipations up to 625 mW. IMAX is 100mA. Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specification for thermal regulation. Thermal resistance of the TO-92 package is 180°C/W junction to ambient with 0.4″ leads from a PC board and 160°C/W junction to ambient with 0.125″ lead length to PC board. The SOIC package θJA is 180°C/W in still air. The 6-Bump DSBGA package θJA is 290°C/W in still air. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM337L 3 LM337L SNVS780D – MAY 1998 – REVISED MAY 2013 www.ti.com Typical Applications 1.2V-25V Adjustable Regulator Full output current not available at high input-output voltages †C1 = 1μF solid tantalum or 10μF aluminum electrolytic required for stability *C2 = 1μF solid tantalum is required only if regulator is more than 4″ from power supply filter capacitor Regulator with Trimmable Output Voltage Trim Procedure: —If VOUT is −23.08V or bigger, cut out R3 (if smaller, don't cut it out). —Then if VOUT is −22.47V or bigger, cut out R4 (if smaller, don't). —Then if VOUT is −22.16V or bigger, cut out R5 (if smaller, don't). This will trim the output to well within 1% of −22.00 VDC, without any of the expense or trouble of a trim pot (see LB46). Of course, this technique can be used at any output voltage level. 4 Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM337L LM337L www.ti.com SNVS780D – MAY 1998 – REVISED MAY 2013 REVISION HISTORY Changes from Revision C (May 2013) to Revision D • Page Changed layout of National Data Sheet to TI format ............................................................................................................ 4 Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM337L 5 PACKAGE OPTION ADDENDUM www.ti.com 21-May-2013 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish (2) MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) LM337LM ACTIVE SOIC D 8 95 TBD Call TI Call TI -25 to 100 LM337 LM LM337LM/NOPB ACTIVE SOIC D 8 95 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -25 to 100 LM337 LM LM337LMX ACTIVE SOIC D 8 2500 TBD Call TI Call TI -25 to 100 LM337 LM LM337LMX/NOPB ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -25 to 100 LM337 LM LM337LZ/LFT1 ACTIVE TO-92 LP 3 2000 Green (RoHS & no Sb/Br) SN Level-1-NA-UNLIM LM337 LZ LM337LZ/LFT3 ACTIVE TO-92 LP 3 2000 Green (RoHS & no Sb/Br) SNCU Level-1-NA-UNLIM LM337 LZ LM337LZ/LFT4 ACTIVE TO-92 LP 3 2000 Green (RoHS & no Sb/Br) SNCU Level-1-NA-UNLIM LM337 LZ LM337LZ/NOPB ACTIVE TO-92 LP 3 1800 Green (RoHS & no Sb/Br) SNCU Level-1-NA-UNLIM -25 to 100 LM337 LZ (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. Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com (4) 21-May-2013 There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. 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Addendum-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 8-May-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LM337LMX SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LM337LMX/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 8-May-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM337LMX SOIC D 8 2500 367.0 367.0 35.0 LM337LMX/NOPB SOIC D 8 2500 367.0 367.0 35.0 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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