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Product details

Parameters

Output options Adjustable Output, Negative Output Iout (Max) (A) 1.5 Vin (Max) (V) -4.2 Vin (Min) (V) -40 Vout (Max) (V) -1.2 Vout (Min) (V) -37 Noise (uVrms) 38 Iq (Typ) (mA) 0.065 Thermal resistance θJA (°C/W) 23 Load capacitance (Min) (µF) 1 Rating Catalog Regulated outputs (#) 1 Features Accuracy (%) 2.4 PSRR @ 100 KHz (dB) 35 Dropout voltage (Vdo) (Typ) (mV) 2400 Operating temperature range (C) -40 to 125, 0 to 125, 0 to125 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

SOT-223 (DCY) 4 46 mm² 6.5 x 7 TO-220 (NDE) 3 47 mm² 10.16 x 4.58 TO-220 (NDG) 3 194 mm² 10.16 x 19.05 open-in-new Find other Linear regulators (LDO)

Features

  • 1.5-A Output Current
  • Line Regulation 0.01%/V (Typical)
  • Load Regulation 0.3% (Typical)
  • 77-dB Ripple Rejection
  • 50 ppm/°C Temperature Coefficient
  • Thermal Overload Protection
  • Internal Short-Circuit Current Limiting
    Protections
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Description

The LM137 and LM337-N are adjustable 3-terminal negative voltage regulators capable of supplying –1.5 A or more currents over an output voltage range of –1.25 V to –37 V. It requires only two external resistors to set the output voltage and one output capacitor for frequency compensation. The circuit design has been optimized for excellent regulation and low thermal transients. Further, the LM137 and LM337-N feature internal current limiting, thermal shutdown and safe-area compensation, making it virtually blowout-proof against overloads.

The LM137 and LM337-N are ideal complements to the LM117 and LM317 adjustable positive regulators. The LM137 has a wider operating temperature range than the LM337-N and is also offered in military and space qualified versions.

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Exact equivalent in functionality and parametrics to the compared device:
LM337 ACTIVE 1.5-A, negative, adjustable linear voltage regulator Pin-to-pin equivalent for cost-sensitive applications

Technical documentation

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No results found. Please clear your search and try again. View all 9
Type Title Date
* Datasheet LM137, LM337-N 3-Terminal Adjustable Negative Regulators datasheet (Rev. E) Jan. 13, 2016
Technical articles LDO basics: capacitor vs. capacitance Aug. 01, 2018
Technical articles LDO Basics: Preventing reverse current Jul. 25, 2018
Technical articles LDO basics: introduction to quiescent current Jun. 20, 2018
Technical articles LDO basics: noise – part 1 Jun. 14, 2017
User guides LM317A-337N-EVM User's Guide Jan. 21, 2016
Application notes Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A) May 05, 2013
Application notes LB-46 A New Production Technique for Trimming Voltage Regulators May 15, 2004
Application notes A New Production Technique for Trimming Voltage Regulators Oct. 03, 2002

Design & development

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

Hardware development

EVALUATION BOARDS 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

Design tools & simulation

SIMULATION MODELS Download
SNVMAP4.ZIP (1 KB) - PSpice Model
SIMULATION MODELS Download
SNVMAP5.ZIP (49 KB) - PSpice Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

Package Pins Download
SOT-223 (DCY) 4 View options
TO-220 (NDE) 3 View options
TO-220 (NDG) 3 View options

Ordering & quality

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