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L7805CV

L7805CV

STMicroelectronics
Classic fixed 5 V regulator in a through-hole package for simple, robust 5 V regulation when board space is less constrained.
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Overview

The L7805CV is a classic positive fixed-voltage regulator providing a stable 5V output. Packaged in a robust TO-220 through-hole form factor, it is designed for applications where simplicity, reliability, and ease of thermal management are prioritized over minimizing board space. It features internal protection mechanisms to safeguard against common electrical faults.

Why Choose This Part

This regulator offers excellent reliability due to its robust TO-220 package and built-in protection features like thermal overload and short-circuit protection. Its through-hole mounting makes it easy to work with for prototyping and repairs, and it can supply up to 1.5A of current. The L7805CV is a cost-effective and straightforward solution for generating a stable 5V supply from an input voltage up to 35V.

Applications

Local On-Card Regulation
Used to provide a stable 5V supply to specific sections of a circuit board, isolating them from potential noise or voltage fluctuations on a main power bus.
General Purpose 5V Power Supply
Suitable for creating basic, reliable 5V power rails in prototypes, educational projects, or simple electronic devices that require up to 1.5A.
Adjustable Voltage and Current Regulators
Can be combined with external components to create more complex adjustable voltage or current regulation circuits, leveraging its stable fixed output as a reference.
Legacy System Maintenance
Ideal for repairs or replacements in older electronic systems that utilized the standard L78xx series, ensuring compatibility and reliable operation.

Key Specifications

PSRR 62dB (120Hz)
Output Type Fixed
Mounting Type Through Hole
Package / Case TO-220-3
Current - Output 1.5A
Protection Features Over Temperature, Short Circuit
Number of Regulators 1
Output Configuration Positive
Operating Temperature 0degC ~ 125degC
Voltage - Input (Max) 35V
Voltage Dropout (Max) 2V @ 1A (Typ)
Supplier Device Package TO-220
Current - Quiescent (Iq) 8 mA
Voltage - Output (Min/Fixed) 5V

Getting Started

To get started with the L7805CV, simply connect the input voltage (7V to 35V) to the input pin, ground to the common pin, and retrieve the regulated 5V from the output pin. It is recommended to use input and output capacitors for stability, typically 0.33uF on the input and 0.1uF on the output. For current draws approaching 1.5A, a heatsink will be necessary due to power dissipation in the TO-220 package.

Also Consider

AMS1117-5.0 Advanced Monolithic Systems - A common 5V LDO alternative, often found in surface-mount packages for more compact designs.
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