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L7812CV

L7812CV

STMicroelectronics
Linear Voltage Regulator IC Positive Fixed 1 Output 1.5A TO-220
Active37,488 in stock

Overview

The L7812CV is a positive fixed voltage regulator that provides a stable 12V output for industrial and hobbyist electronics. It is capable of delivering up to 1.5A of output current when used with appropriate heat sinking and features internal current limiting and thermal shutdown protection. This three-terminal regulator simplifies power supply design by eliminating the need for external compensation components.

Why Choose This Part

The TO-220 package offers excellent heat dissipation and a robust through-hole mounting option for high-vibration environments. It includes built-in thermal overload and short-circuit protection, making the IC virtually indestructible in typical application scenarios.

Applications

Local On-Card Regulation
Provides clean 12V power directly at the point of load on printed circuit boards to eliminate noise from long power distribution lines.
Power Supplies
Used as the primary regulation stage in linear AC-DC power adapters for low-noise instrumentation.
Solar Battery Systems
Regulates fluctuating voltages from lead-acid batteries down to a steady 12V for powering sensors and communication equipment.

Key Specifications

PSRR 55dB (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) 12V

Getting Started

To achieve stable operation, place a 0.33uF ceramic capacitor on the input and a 0.1uF capacitor on the output as close to the IC pins as possible. Ensure the input voltage stays between 14.5V and 35V for proper regulation, and calculate the required heat sink size based on the power dissipation (Vin - Vout) * Iout.

Also Consider

LM317AT TITexas Instruments - An adjustable linear regulator in a TO-220 package for designs that may require a non-standard output voltage.