FAN53555BUC13X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN53555BUC13X is a synchronous step-down switching regulator manufactured by onsemi, formerly Fairchild Semiconductor. It operates with an input voltage range of 2.5V to 5.5V and delivers a programmable output voltage between 0.8V and 1.43V. The device supports a maximum continuous output current of 5A at a fixed switching frequency of 2.4MHz. It utilizes a 20-WLCSP package measuring 1.96x1.56mm. The component functions within an ambient temperature range of -40°C to 85°C and features synchronous rectification for improved efficiency.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous buck topology with integrated high-side and low-side power switches
• Digitally programmable output voltage via I2C interface
• Compact wafer-level chip-scale packaging for space-constrained designs

Voltage Regulators - DC DC Switching Regulators Applications

• Portable computing devices requiring efficient core voltage regulation
• Embedded systems with single-rail power distribution needs
• Industrial control modules operating in extended temperature ranges

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'BUC13X' against official manufacturer documentation to confirm exact output voltage settings and package variations. Confirm current lifecycle status as this part may be subject to discontinuation notices. Ensure compatibility with existing PCB footprint and reflow profiles before integration into production lines.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this regulator when a compact solution is required for high-current applications up to 5A. The fixed 2.4MHz switching frequency allows for smaller passive components compared to lower-frequency alternatives. Verify that the programmable output range meets the target load requirements without exceeding the maximum input voltage limits of the system.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the TinyBuck family of power management ICs designed for mobile and embedded applications. It replaces older discrete solutions or larger packaged regulators by integrating power switches and control logic into a minimal footprint. The series offers various output configurations tailored for different processor and memory voltage rails.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Check manufacturer obsolescence notices for direct replacements within the same product line.