L7909 IC Negative Voltage Regulator L7909

Product Overview

The L7909 is a three-terminal negative voltage regulator from the L79 series. It is designed to provide a fixed output voltage of -9V. These regulators are used for local on-card regulation to eliminate distribution problems associated with single-point regulation and are particularly suited for split power supply applications when paired with the L78 positive regulator series. Each device includes internal current limiting, thermal shutdown, and safe area protection.

Core Specifications

• Manufacturer: STMicroelectronics

• Function: Negative Voltage Regulator

• Fixed Output Voltage: -9V

• Max Output Current: Up to 1.5A (with adequate heat sinking)

• Protection Features: Thermal overload protection, short-circuit protection, and output transition SOA protection

• Output Tolerance: 4% (C version) at 25°C

• Available Packages: TO-220, TO-220FP, D2PAK