L7809ABV

Overview

The L7809ABV is a three-terminal positive linear voltage regulator from the STMicroelectronics L78 series, providing a fixed 9 V output. It supports an input voltage range of 11 V to 35 V and delivers up to 1.5 A of continuous output current. The device features internal thermal overload protection, short-circuit current limiting, and safe area protection. It operates within a temperature range of -40 °C to +125 °C and is housed in a TO-220 package.

Feature Summary

• Integrated thermal shutdown and current limiting for robust operation
• Fixed 9 V output with high line and load regulation
• Internal safe area protection prevents failure under extreme conditions

Applications

• Local on-card regulation for electronic circuits
• Power supplies for industrial equipment
• Embedded systems requiring stable DC voltage sources

Procurement Notes

Verify the specific suffix 'BV' against official datasheets to confirm package type and tape/reel specifications. Ensure the component matches the required thermal performance for the intended application environment. Cross-reference part numbers with authorized distributors to avoid counterfeit products.

Selection Notes

Select this regulator when a fixed 9 V output is required with currents up to 1.5 A. Consider the TO-220 package for adequate heat dissipation without external components. Evaluate input voltage headroom to ensure dropout voltage requirements are met across the operating temperature range.

Part Context

Part of the widely used L78 series of three-terminal positive regulators. This family offers various fixed output voltages and packages including TO-220, D2PAK, and DPAK. Known for reliability and ease of use in general-purpose power supply designs.

Replacement Considerations

Compatible equivalents include L7809CV or L7809AC depending on temperature grade and package requirements. Verify pinout compatibility and thermal resistance values before substitution.