L78L08A

Overview

The UMW L78L08A is a three-terminal positive linear voltage regulator designed for fixed-output applications. It provides a nominal output voltage of 8 V with a maximum continuous output current of 100 mA. The device operates within an input voltage range from 10.5 V to 30 V, ensuring stable regulation under varying supply conditions. It supports surface-mount installation in an SO-8 package and functions reliably across an operating temperature range of -20 °C to +120 °C. Internal protection mechanisms include thermal shutdown and current limiting to safeguard the component during overload or excessive heat scenarios.

Feature Summary

• Provides a fixed 8 V DC output regulated from higher input voltages
• Supports up to 100 mA load current capability
• Includes internal thermal shutdown and current limiting protections
• Designed for surface-mount integration via SO-8 packaging

Applications

• General-purpose power supply regulation
• Battery-powered equipment voltage conditioning
• Embedded system biasing circuits

Procurement Notes

Verify the specific suffix designation against the manufacturer's official documentation to confirm pinout compatibility and thermal characteristics. Ensure the selected variant matches the required operating temperature range and package style for your PCB layout. Cross-reference the datasheet revision date to guarantee alignment with current manufacturing specifications and compliance standards before finalizing procurement orders.

Selection Notes

Select this component when a stable 8 V rail is required for low-current loads up to 100 mA. The SO-8 package facilitates automated surface-mount assembly processes. Consider the thermal dissipation requirements based on the voltage differential between input and output at full load. Verify that the input voltage remains within the specified minimum and maximum limits to maintain proper regulation performance.

Part Context

This regulator belongs to the L78LxxA series of three-terminal positive voltage regulators. These devices are widely used in consumer electronics and industrial control systems requiring simple, cost-effective voltage regulation solutions. The L78L08A specifically targets applications needing an 8 V output, offering a reliable alternative to discrete transistor-based regulator designs while maintaining compact form factors suitable for space-constrained boards.

Replacement Considerations

Compatible substitutes include the STMicroelectronics L78L08ACUTR and Nisshinbo NJM78L08UA-TE2. Both alternatives offer identical 8 V output and 100 mA current ratings in SOT-89 packages. Verify pinout compatibility and thermal resistance values before substitution to ensure seamless integration into existing circuit designs without requiring layout modifications.