FAN53540UCX

Voltage Regulators - DC DC Switching Regulators Overview

The FAN53540UCX is a synchronous step-down switching regulator IC from the TinyBuck series, manufactured by onsemi. It features an adjustable output voltage range from 0.8V to 4.95V and delivers up to 5A of continuous output current. The device operates with an input voltage supply between 2.7V and 5.5V 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 a temperature range of -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates synchronous rectification for high efficiency in a small footprint
• Supports programmable output voltage adjustment via external resistors
• Designed for point-of-load regulation in space-constrained applications

Voltage Regulators - DC DC Switching Regulators Applications

• Cloud systems computing power distribution
• Point-of-Load (POL) regulators
• Portable electronic devices requiring efficient DC-DC conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify component authenticity through authorized channels as this part is officially discontinued. Check Product Change Notifications for any historical manufacturing updates or material declarations. Confirm package integrity upon receipt, as WLCSP components are sensitive to moisture and mechanical stress during handling and storage.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a 5A buck converter is required in a minimal area constraint. Ensure the application input voltage remains within the 2.7V to 5.5V range. Consider thermal management requirements due to the high current density in the WLCSP package. Verify that the target output voltage falls within the 0.8V to 4.95V adjustability window.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the TinyBuck family of power management integrated circuits. It represents a transition from Fairchild Semiconductor's portfolio to onsemi following corporate restructuring. The component is designed to replace older generation regulators offering similar current capabilities but with improved efficiency and smaller physical dimensions suitable for modern mobile and embedded systems.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. As the component is marked as End-of-Life (EOL), engineers should consult official replacement guides or contact the manufacturer directly for qualified alternatives.