100355PC

Overview

The FAN53555UC05X is a synchronous step-down switching regulator manufactured by Fairchild Semiconductor. It operates with an input voltage range of 2.5V to 5.5V and provides a single positive output adjustable from 0.6V to 1.23V. The device delivers up to 5A of output current at a fixed switching frequency of 2.4MHz. Packaged in a compact 20-WLCSP (1.96x1.56mm) format, it supports surface mount assembly and functions within an operating temperature range of -40°C to 85°C.

Feature Summary

• Synchronous rectification for improved efficiency
• Programmable output voltage control
• Compact WLCSP package design

Applications

• Portable electronic devices requiring efficient power management
• Embedded systems utilizing low-voltage logic
• Battery-powered equipment needing regulated DC supply

Procurement Notes

Verify the manufacturer part number FAN53555UC05X against official Fairchild documentation to ensure authenticity. Confirm the specific suffix matches the required electrical characteristics and packaging type. Check RoHS compliance status and moisture sensitivity level before integration into production workflows.

Selection Notes

Select this component when a small form factor is critical due to its WLCSP footprint. Ensure the application requires a maximum output current of 5A and an input voltage not exceeding 5.5V. Consider the fixed 2.4MHz switching frequency for electromagnetic interference compatibility and thermal management requirements.

Part Context

This device belongs to the FAN53555 family of buck regulators designed for high-density power applications. It integrates power switches and control circuitry into a minimal outline package, distinguishing it from larger SOIC or QFN alternatives while maintaining similar regulatory performance metrics.

Replacement Considerations

Consult official datasheets for direct pin-compatible substitutes. Verify that any alternative maintains the 20-WLCSP package dimensions and 5A current capability.