LA5752-E

Voltage Regulators - DC DC Switching Regulators Overview

The LA5752-E is a separately-excited step-down switching regulator IC designed by Fairchild Semiconductor, now part of onsemi. It operates as a fixed-output DC-DC converter, providing a steady 5V output from an input voltage range of 7V to 28V. The device features a switching frequency of 60kHz and does not utilize synchronous rectification. It is housed in a TO-220-5 package with formed leads and supports an operating junction temperature range of -30°C to 150°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Fixed 5V output voltage regulation for step-down applications
• Wide input voltage tolerance up to 28V
• High thermal capability with junction temperature support up to 150°C

Voltage Regulators - DC DC Switching Regulators Applications

• General purpose step-down DC-DC conversion
• Power supply modules requiring 5V output
• Industrial electronic systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer status carefully, as documentation indicates this component may be obsolete or discontinued by Fairchild Semiconductor. Confirm current availability through authorized distributors or onsemi directly. Ensure the specific suffix matches the required package and lead configuration. Cross-reference datasheets for any updates regarding pinout or electrical characteristics before finalizing procurement plans.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a simple, non-synchronous buck converter is required for 5V generation. The 60kHz frequency balances efficiency and component size. Consider the TO-220-5 package for thermal management needs. Verify that the input voltage stays within the 7V to 28V range. Check if the lack of synchronous rectification meets efficiency requirements for the specific load current.

Voltage Regulators - DC DC Switching Regulators Part Context

The LA5752 belongs to the family of separately-excited switching regulators. It is distinct from integrated monolithic buck converters by its external excitation requirement. The model represents a legacy product line from Fairchild Semiconductor, which has been acquired by onsemi. Documentation may reference either brand name depending on the publication date.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Due to the potential obsolete status, direct replacements should be verified against current onsemi portfolios or equivalent third-party step-down regulators with similar 5V output and 28V input capabilities.