FAN53555UC01X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN53555UC01X is a synchronous step-down switching regulator manufactured by Fairchild Semiconductor, now part of onsemi. It operates with an input voltage range of 2.5V to 5.5V and provides a programmable output voltage from 0.6V to 1.23V. The device delivers up to 5A of continuous output current at a fixed switching frequency of 2.4MHz. Packaged in a compact 20-WLCSP (1.96x1.56mm) format, it supports surface mount installation and functions within an operating temperature range of -40°C to 85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates synchronous rectification for high efficiency across the load range
• Utilizes digital programming architecture for precise output voltage control
• Employs a specialized buck topology to minimize external component requirements

Voltage Regulators - DC DC Switching Regulators Applications

• Portable computing systems
• Cloud infrastructure power distribution
• Mobile communication devices

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer status carefully, as Fairchild Semiconductor operations were acquired by onsemi. Confirm the specific suffix indicates the correct output voltage configuration. Check datasheets for any Product Change Notifications regarding pinout or electrical parameter updates. Ensure the package dimensions match the target PCB footprint exactly.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a single output channel is required with a maximum current demand of 5A. The fixed 2.4MHz frequency allows for smaller passive components compared to lower-frequency alternatives. Verify that the application environment stays within the specified -40°C to 85°C ambient temperature limits for reliable operation.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the TinyBuck series, designed for space-constrained applications requiring high current density. The WLCSP package offers one of the smallest footprints available for 5A regulators. The product line emphasizes simplified design-in processes through reduced external bill of materials.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Public records indicate the FAN53555UC01X has reached End-of-Life status. Engineers should evaluate alternative sources or redesign using currently active equivalents from the same family or compatible competitors.