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L7805CV-DG

5V fixed LDO regulator, 1.5A output, TO-220, internal protection

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Manufacturer Part：

L7805CV-DG

Package：

TO-220 (10.4 x 4.6 x 15.75 mm)

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Description

Product Overview

The L7805CV-DG from STMicroelectronics is a three-terminal positive voltage regulator in a TO-220 package providing a fixed 5V output at up to 1.5A. It features internal current limiting, thermal shutdown, and safe operating area protection, making it virtually indestructible. The -DG suffix denotes the dry-pack packaging option for moisture-sensitive storage and shipping.

Key Specifications

Output Voltage 5V (fixed)
Output Current Up to 1.5A
Input Voltage Range 7V to 35V
Dropout Voltage 2V typical @ 1A
Line Regulation 50 mV typical
Load Regulation 100 mV typical
Quiescent Current 6 mA typical
Operating Temperature 0°C to +125°C
Package TO-220 (10.4 x 4.6 x 15.75 mm)

Features

  • Output current up to 1.5A with adequate heatsinking
  • Fixed 5V output with 2% tolerance (A version)
  • Internal thermal overload protection
  • Internal short-circuit current limiting
  • Output transistor safe operating area protection
  • Available in TO-220, TO-220FP, D2PAK, and DPAK packages

Applications

  • 5V logic power supply regulation
  • Local on-card voltage regulation
  • Battery charger and power management
  • Microcontroller and digital IC power supplies
  • Industrial and consumer power supply circuits

The L7805CV-DG from STMicroelectronics is a member of the L78 series of three-terminal positive voltage regulators, providing a fixed 5V output at up to 1.5A. Housed in a TO-220 through-hole package, this regulator integrates internal current limiting, thermal shutdown, and safe operating area protection. The -DG suffix indicates dry-pack packaging for moisture-sensitive storage. It is widely used as a local on-card regulator, eliminating distribution problems associated with single-point regulation in power supply designs.

The L7805CV-DG uses a series-pass transistor topology controlled by a feedback loop. A bandgap voltage reference provides a stable internal reference voltage. The output voltage is divided by an internal resistor network and compared against the reference by an error amplifier, which drives the series-pass transistor to maintain 5V at the output. If the output current exceeds the safe limit, the current limiting circuit reduces the drive to the pass transistor. If the junction temperature exceeds approximately 150°C, the thermal shutdown circuit turns off the pass transistor. The dropout voltage of approximately 2V means the input must be at least 7V to maintain 5V regulation.

Pin Name Type Function
1 INPUT Power Unregulated input voltage (7-35V)
2 GND Power Ground connection
3 OUTPUT Power Regulated 5V output
  • 5V logic power supply for microcontroller and digital circuits
  • Local on-card regulation in distributed power systems
  • Battery-powered device regulation with appropriate input voltage
  • Industrial control system power rails
  • Consumer electronics power supply stages
Manufacturer Part Number Package Notes
STMicroelectronics L7805ABV-DG TO-220 2% tolerance, higher accuracy version
onsemi MC7805ECTG TO-220 Direct equivalent, 5V/1A
TI UA7805CKTTR TO-220 Industry standard 7805 equivalent
Infineon ICY78M05CT TO-220 500mA lower current alternative
Diodes Inc AZ1117CH-5.0 SOT-223 1A LDO alternative, lower dropout
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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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