L7918CV Transistor (ST) TO-220 Code: 10282473

The L7918CV is a fixed -18V, 1.5A linear voltage regulator in a TO-220 package. It features internal short-circuit and thermal overload protection, making it ideal for on-card regulation and split power supplies. Access the full manufacturer specifications via the STMicroelectronics L7918CV Datasheet.

Key Specifications

• Output Voltage:-18V fixed
• Output Current:Up to 1.5A
• Input Voltage Range:-35V to -14.5V
• Operating Temperature:0°C to +150°C

Standard Circuit Configuration

To maintain stability and reduce noise, a basic setup requires two external capacitors:

• Input Capacitor (C1):A 2.2µF to 10µF electrolytic capacitor is typically placed between the input pin and ground.
• Output Capacitor (C2):A 1µF or larger capacitor is placed between the output pin and ground to improve transient response.

Thermal Management

If you are pulling heavier currents closer to the 1.5A limit, a heatsink is recommended to prevent the device from engaging its thermal overload protection.