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LM137

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Extended Temperature 1.5A Adjustable Output Negative Voltage Regulator / LDO

Data sheet
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Extended Temperature 1.5A Adjustable Output Negative Voltage Regulator / LDO

LM137

ACTIVE
Data sheet Order now

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) 1110 Iq (Typ) (mA) 0.065 Thermal resistance θJA (°C/W) 137 Load capacitance (Min) (µF) 1 Rating Catalog Regulated outputs (#) 1 Features — Accuracy (%) 4 PSRR @ 100 KHz (dB) 30 Dropout voltage (Vdo) (Typ) (mV) 3000 Operating temperature range (C) -55 to 150 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

TO-CAN (NDT) 3 92 mm² 10.03 x 9.14 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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Technical documentation

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Type Title Date
* Datasheet LM137, LM337-N 3-Terminal Adjustable Negative Regulators datasheet (Rev. E) Jan. 13, 2016
Application notes A Topical Index of TI LDO Application Notes (Rev. F) Jun. 27, 2019
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
Selection guides TI Components for Aerospace and Defense Guide (Rev. E) Mar. 22, 2017
Application notes AN-103 LM340 Series Three Terminal Positive Regulators (Rev. A) May 06, 2013
Application notes AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B) May 06, 2013
Application notes AN-182 Improving Power Supply Reliability with IC Power Regulators (Rev. B) May 05, 2013
Application notes Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A) May 05, 2013
More literature Die D/S LM137H MDS MCD2120A 3-Terminal Adjustable Negative Regulator Dec. 20, 2012
Application notes Packaging Limits Range of Linear Regulators May 08, 2010
Application notes Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A) Jun. 04, 2008
Application notes A New Production Technique for Trimming Voltage Regulators Oct. 03, 2002
Application notes Understanding the Terms and Definitions of LDO Voltage Regulators Oct. 21, 1999

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