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LM337

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1.5-A, negative, adjustable linear voltage regulator

Data sheet
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1.5-A, negative, adjustable linear voltage regulator

LM337

ACTIVE
Data sheet Order now

Product details

Parameters

Output options Adjustable Output, Negative Output Iout (Max) (A) 1.5 Vin (Max) (V) -3 Vin (Min) (V) -40 Vout (Max) (V) -1.2 Vout (Min) (V) -37 Noise (uVrms) 1110 Iq (Typ) (mA) 1.5 Thermal resistance θJA (°C/W) 23 Load capacitance (Min) (µF) 1 Rating Catalog Regulated outputs (#) 1 Features — Accuracy (%) 2.4 PSRR @ 100 KHz (dB) 19 Dropout voltage (Vdo) (Typ) (mV) 2000 Operating temperature range (C) 0 to 125 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

TO-220 (KCS) 3 88 mm² 10.15 x 15.4 TO-252 (KVU) 3 67 mm² 6.6 x 10.11 TO-263 (KTT) 3 155 mm² 10.16 x 15.24 open-in-new Find other Linear regulators (LDO)

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
 open-in-new Find other Linear regulators (LDO)

Description

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 require only two external resistors to set the output voltage and one output capacitor for frequency compensation.

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TPS7A33 ACTIVE 1-A, high-PSRR, negative, adjustable low-dropout voltage regulator with enable This is a 1-A negative LDO regulator with lower noise (16 μVRMS)
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Technical documentation

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Type Title Date
* Data sheet LMx37 3-Terminal Adjustable Regulators datasheet (Rev. L) Jan. 12, 2015
Application note LDO Noise Demystified (Rev. B) Aug. 18, 2020
Application note A Topical Index of TI LDO Application Notes (Rev. F) Jun. 27, 2019
Technical article LDO basics: capacitor vs. capacitance Aug. 01, 2018
Technical article LDO Basics: Preventing reverse current Jul. 25, 2018
Technical article LDO basics: introduction to quiescent current Jun. 20, 2018
Selection guide Low Dropout Regulators Quick Reference Guide (Rev. P) Mar. 21, 2018
Application note LDO PSRR Measurement Simplified (Rev. A) Aug. 09, 2017
Technical article LDO basics: noise – part 1 Jun. 14, 2017
Application note AB-12 Wide Adjustable Range PNP Voltage Regulator (Rev. B) May 06, 2013
Application note AN-1028 Maximum Power Enhancement Techniques for Power Packages (Rev. B) May 06, 2013
Application note AN-103 LM340 Series Three Terminal Positive Regulators (Rev. A) May 06, 2013
Application note AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B) May 06, 2013
Application note AN-42 IC Provides On-Card Regulation for Logic Circuits (Rev. B) May 06, 2013
Application note AN-178 Applications for an Adjustable IC Power Regulator (Rev. B) May 05, 2013
Application note AN-182 Improving Power Supply Reliability with IC Power Regulators (Rev. B) May 05, 2013
Application note Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A) May 05, 2013
Application note AN-1061 Power Conversion in Line-Powered Equipment (Rev. B) Apr. 23, 2013
Application note High-Efficiency Reg has Low Drop-Out Voltage (Rev. B) Apr. 23, 2013
Application note How to pick a linear regulator for noise-sensitive applications Jan. 22, 2013
Application note ANY-OUT™ LDO Controlled by I2C™ IO Expander Device (Rev. A) Sep. 20, 2012
Application note Packaging Limits Range of Linear Regulators May 08, 2010
Application note Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A) Jun. 04, 2008
Application note A New Production Technique for Trimming Voltage Regulators Oct. 03, 2002
Application note Adjustable 3-Terminal Regulator for Low-Cost Battery Charging Systems Oct. 03, 2002
Application note High Stability Regulators Oct. 03, 2002
Application note Understanding the Terms and Definitions of LDO Voltage Regulators Oct. 21, 1999

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
29
Description

The LM317A-337N-EVM demonstrates canonical application of the LM317A adjustable regulator and its negative complement, the LM337-N. The evaluation module (EVM) is assesmbled with the SOT-223 package option for each device, supplying up to 1 A of load current. The EVM is designed for easy (...)

Features
  • Output adjustable from 1.2 V to 37 V for LM317A and –1.2 V to –37 V for LM337-N
  • 1-A load current with 1.5-A option
  • Heat sink space provided for TO-220
  • Large capacitor footprint space for customer selection
View details

Design tools & simulation

SIMULATION MODEL Download
SNVMAP4.ZIP (1 KB) - PSpice Model
SIMULATION MODEL Download
SNVMAP5.ZIP (49 KB) - PSpice Model

Reference designs

REFERENCE DESIGNS Download
30W Ultra Wide Range Power Supply for Protection Relays Reference Design
TIDA-00127 — This power supply solution for Protection Relays handles an ultra-wide range of both AC (88-276V AC) and DC (24-250V DC) inputs making it a suitable platform to power a variety of Protection Relays. The power supply is designed to output industry standard voltages (such as +/- 12V and isolated (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Small Form Factor 12W Ultra Wide Range Power Supply for Protection Relays - Reference Design
TIDA-00227 — This small form factor, 12W power supply solution for protection relays handles an ultra-wide range of both AC and DC inputs making it a suitable platform to power a variety of lower power protection relays that need to be placed in a small housing.  The power supply is designed to output (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
DDPAK/TO-263 (KTT) 3 View options
TO-220 (KCS) 3 View options
TO-252 (KVU) 3 View options

Ordering & quality

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  • Ongoing reliability monitoring

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