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Linear & low-dropout (LDO) regulators

LM237

ACTIVE

1.5-A, negative, adjustable linear voltage regulator with low-IQ

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Data sheet

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Drop-in replacement with upgraded functionality to the compared device
LM337 ACTIVE 1.5-A, negative, adjustable linear voltage regulator Higher Iq
LM337-N ACTIVE 1.5-A, negative, adjustable linear voltage regulator Better PSRR
TPS7A33 ACTIVE 1-A, high-PSRR, negative, adjustable low-dropout voltage regulator with enable Better PSRR

LM237

ACTIVE
Data sheet Order now

Product details

Output options Adjustable Output Iout (max) (A) 1.5 Vin (max) (V) -3 Vin (min) (V) -40 Vout (max) (V) -1.2 Vout (min) (V) -37 Noise (µVrms) 1110 Iq (typ) (mA) 0.065 Thermal resistance θJA (°C/W) 23 Rating Catalog Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Accuracy (%) 4 PSRR at 100 KHz (dB) 19 Dropout voltage (Vdo) (typ) (mV) 2000 Operating temperature range (°C) -25 to 150
Output options Adjustable Output Iout (max) (A) 1.5 Vin (max) (V) -3 Vin (min) (V) -40 Vout (max) (V) -1.2 Vout (min) (V) -37 Noise (µVrms) 1110 Iq (typ) (mA) 0.065 Thermal resistance θJA (°C/W) 23 Rating Catalog Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Accuracy (%) 4 PSRR at 100 KHz (dB) 19 Dropout voltage (Vdo) (typ) (mV) 2000 Operating temperature range (°C) -25 to 150
TO-220 (KCS) 3 46.228 mm² 10.16 x 4.55
  • 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 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

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.

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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Technical documentation

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Type Title Date
* Data sheet LMx37 3-Terminal Adjustable Regulators datasheet (Rev. L) PDF | HTML 12 Jan 2015
Application note LDO Noise Demystified (Rev. B) PDF | HTML 18 Aug 2020
Application note LDO PSRR Measurement Simplified (Rev. A) PDF | HTML 09 Aug 2017
Application note AB-12 Wide Adjustable Range PNP Voltage Regulator (Rev. B) 06 May 2013
Application note AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B) 06 May 2013
Application note AN-42 IC Provides On-Card Regulation for Logic Circuits (Rev. B) 06 May 2013
Application note AN-178 Applications for an Adjustable IC Power Regulator (Rev. B) 05 May 2013
Application note AN-182 Improving Power Supply Reliability with IC Power Regulators (Rev. B) 05 May 2013
Application note Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A) 05 May 2013
Application note AN-1061 Power Conversion in Line-Powered Equipment (Rev. B) 23 Apr 2013
Application note High-Efficiency Reg has Low Drop-Out Voltage (Rev. B) 23 Apr 2013
Application note A New Production Technique for Trimming Voltage Regulators 03 Oct 2002
Application note Adjustable 3-Terminal Regulator for Low-Cost Battery Charging Systems 03 Oct 2002
Application note High Stability Regulators 03 Oct 2002

Design & development

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Simulation model

LM337-N PSpice Transient Model

SNVMAP5.ZIP (49 KB) - PSpice Model
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Simulation model

LM337-N Unencrypted PSpice Transient Model

SNVMAP4.ZIP (1 KB) - PSpice Model
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TO-220 (KCS) 3 View options
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