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L7915CV-DG

3-terminal -15V negative LDO, 1.5A, TO-220, thermal/short-circuit protection

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Manufacturer Part：

L7915CV-DG

Package：

TO-220-3 (10.4 x 4.6 x 9.15mm)

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Description

Product Overview

The L7915CV-DG from STMicroelectronics is a three-terminal negative voltage regulator providing a fixed -15V output at up to 1.5A in a TO-220 package. Part of the L79 series, it features thermal overload protection, short-circuit protection, and output SOA protection, making it ideal for split power supply applications when paired with the L7815 positive regulator.

Key Specifications

Output Voltage -15V (±4% at 25°C)
Output Current Up to 1.5A
Input Voltage Range -17.5V to -35V
Dropout Voltage 1.1V @ 1A
Line Regulation 300mV (input -17.5V to -30V)
Load Regulation 300mV (load 5mA to 1.5A)
Quiescent Current 3mA typ.
Ripple Rejection 60dB typ. @ 120Hz
Output Noise Voltage 65μV (10Hz-100kHz)
Package TO-220-3 (through-hole)
Operating Junction Temp 0°C to +150°C

Features

  • Fixed -15V output with ±4% tolerance
  • Output current up to 1.5A
  • Thermal overload protection
  • Short-circuit current limiting
  • Output transition SOA protection
  • 60dB ripple rejection
  • Low output noise: 65μV
  • Drop-in complement to L7815 positive regulator
  • Pb-Free, ECOPACK2 compliant

Applications

  • Split ±15V power supplies for op-amps
  • Analog circuit negative rail regulation
  • Audio amplifier dual-rail supplies
  • Industrial instrumentation power supplies
  • Test equipment bench power supplies

The L7915CV-DG from STMicroelectronics is a three-terminal fixed negative voltage regulator from the classic L79 series, providing -15V output at up to 1.5A. Designed with the same voltage options as the L78 positive series, it is particularly suited for split power supply configurations. The device incorporates thermal overload protection, short-circuit current limiting, and output safe operating area protection, making it virtually indestructible. The -DG suffix indicates the ECOPACK2 RoHS-compliant version in a TO-220 through-hole package with tube packaging.

The L7915CV-DG is a series pass linear regulator that maintains a constant -15V output by continuously adjusting the conduction of an internal series pass transistor. A voltage divider network samples the output voltage and compares it to an internal bandgap reference. The error amplifier drives the pass transistor to maintain regulation. The dropout voltage of 1.1V at 1A means the input must be at least -16.1V to maintain regulation. The thermal shutdown activates when the junction temperature exceeds approximately 150°C, and the short-circuit protection limits current to about 300mA during fault conditions.

Pin Name Type Function
1 GND Ground Common ground reference
2 INPUT Power Unregulated negative input (-17.5V to -35V)
3 OUTPUT Output Regulated -15V output
  • ±15V split supply for dual op-amp circuits and analog front-ends
  • Audio amplifier negative rail power supply
  • Industrial instrumentation and test equipment dual-rail rails
  • On-card local negative regulation to eliminate distribution noise
  • Adjustable negative supply using external resistors for non-standard voltages
Manufacturer Part Number Package Notes
ST L7915ACV-DG TO-220 Higher accuracy ±2% version
ST L7915CD2T-TR D²PAK SMD version, same specs
TI LM7915CT TO-220 Pin-compatible equivalent
onsemi MC7915CTG TO-220 Pin-compatible alternative
TI LM337T TO-220 Adjustable -1.2V to -37V version
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We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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