FAN53555UC05X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN53555UC05X is a digitally programmable buck switching regulator IC manufactured by Fairchild Semiconductor, now part of onsemi. 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. It utilizes synchronous rectification for high efficiency and is housed in a compact 20-WLCSP package measuring 1.96x1.56mm. The component supports operation within a temperature range of -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Digitally programmable output voltage via internal control interface
• Synchronous rectifier architecture for optimized power conversion
• Fixed 2.4MHz switching frequency enabling reduced external component size
• Integrated shutdown capability for power management

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics requiring compact power solutions
• Embedded systems with single-rail voltage regulation needs
• Battery-powered devices utilizing step-down topology
• Industrial control modules operating within standard temperature ranges

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer status as Fairchild Semiconductor has been acquired by onsemi; confirm if the specific suffix UC05X denotes a fixed or programmable variant based on official datasheets. Check RoHS3 compliance and MSL ratings before integration. Ensure the WLCSP-20 package dimensions align with PCB footprint requirements. Validate supply chain authenticity due to potential legacy stock variations.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a high-current 5A buck converter is required in a minimal footprint. The 2.4MHz frequency allows for smaller inductors compared to lower-frequency alternatives. Ensure the load does not exceed 5A continuous current. Verify that the desired output voltage falls within the 0.6V to 1.23V range. Consider thermal dissipation capabilities of the WLCSP package under full load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the TinyBuck family of DC-DC converters designed for space-constrained applications. It integrates power switches and control logic into a single chip. The series emphasizes high efficiency and small solution size. Other variants in the family may offer different current ratings or fixed output voltages. The technology leverages advanced CMOS processes for low quiescent current.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Check for direct cross-reference part numbers from onsemi's current portfolio. Verify pin-to-pin compatibility if substituting with other WLCSP-20 regulators. Confirm electrical parameters match, specifically the 5A current rating and 2.4MHz frequency. Review any changes in control interface or feedback resistor configurations.