500-mA, negative linear voltage regulator

UA79M is in the process of being discontinued
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LM79 ACTIVE 1.5-A, negative linear voltage regulator Replacement
TPS7A33 ACTIVE 1-A, high-PSRR, negative, adjustable low-dropout voltage regulator with enable Alternative product with ultra-low-noise performance, better accuracy and lower dropout voltage

Product details

Output options Adjustable Output, Negative Output Iout (max) (A) 0.5 Vin (max) (V) -7 Vin (min) (V) -25 Vout (max) (V) -5 Vout (min) (V) -8 Fixed output options (V) -8, -5 Noise (µVrms) 125 Iq (typ) (mA) 1 Thermal resistance θJA (°C/W) 23 Rating Catalog Load capacitance (min) (µF) 0.1 Regulated outputs (#) 1 Accuracy (%) 3.75 Dropout voltage (Vdo) (typ) (mV) 1100 Operating temperature range (°C) 0 to 125
Output options Adjustable Output, Negative Output Iout (max) (A) 0.5 Vin (max) (V) -7 Vin (min) (V) -25 Vout (max) (V) -5 Vout (min) (V) -8 Fixed output options (V) -8, -5 Noise (µVrms) 125 Iq (typ) (mA) 1 Thermal resistance θJA (°C/W) 23 Rating Catalog Load capacitance (min) (µF) 0.1 Regulated outputs (#) 1 Accuracy (%) 3.75 Dropout voltage (Vdo) (typ) (mV) 1100 Operating temperature range (°C) 0 to 125
TO-220 (KCS) 3 46.228 mm² 10.16 x 4.55 TO-252 (KVU) 3 66.726 mm² 6.6 x 10.11
  • 3-Terminal Regulators
  • Output Current up to 500 mA
  • No External Components
  • High Power-Dissipation Capability
  • Internal Short-Circuit Current Limiting
  • Output Transistor Safe-Area Compensation

  • 3-Terminal Regulators
  • Output Current up to 500 mA
  • No External Components
  • High Power-Dissipation Capability
  • Internal Short-Circuit Current Limiting
  • Output Transistor Safe-Area Compensation

This series of fixed-negative-voltage integrated-circuit voltage regulators is designed to complement the µA78M00 series in a wide range of applications. These applications include on-card regulation for elimination of noise and distribution problems associated with single-point regulation. Each of these regulators delivers up to 500 mA of output current. The internal current-limiting and thermal-shutdown features of these regulators make them essentially immune to overload. In addition to use as fixed-voltage regulators, these devices can be used with external components to obtain adjustable output voltages and currents, and also as the power-pass element in precision regulators.

This series of fixed-negative-voltage integrated-circuit voltage regulators is designed to complement the µA78M00 series in a wide range of applications. These applications include on-card regulation for elimination of noise and distribution problems associated with single-point regulation. Each of these regulators delivers up to 500 mA of output current. The internal current-limiting and thermal-shutdown features of these regulators make them essentially immune to overload. In addition to use as fixed-voltage regulators, these devices can be used with external components to obtain adjustable output voltages and currents, and also as the power-pass element in precision regulators.

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Technical documentation

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Type Title Date
* Data sheet uA79M00 Series datasheet (Rev. K) 25 Apr 2005
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

Design & development

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Evaluation board

MLTLDO2EVM-037 — Universal LDO linear voltage regulator evaluation module for DCY, DDA and KVU packages

The MLTLDO2EVM-037 multipackage low-dropout (LDO) evaluation module (EVM) allows design engineers to evaluate the operation and performance of several common packages of linear regulators for possible use in their own circuit application. This EVM configuration contains a DDA, 3-pin and 5-pin KVU, (...)

User guide: PDF
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Package Pins Download
TO-220 (KCS) 3 View options
TO-252 (KVU) 3 View options

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