FAN53555BUC23X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN53555BUC23X is a synchronous step-down switching voltage regulator from onsemi, part of the TinyBuck series. It delivers a digitally programmable output voltage ranging from 600 mV to 1.3875 V with a maximum continuous output current of 5 A. The device operates from an input supply between 2.5 V and 5.5 V at a fixed switching frequency of 2.4 MHz. It features an I2C interface for digital programming and control. Packaged in a compact 20-WLCSP (1.96x1.56 mm) footprint, it supports operation across a temperature range of -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Digitally programmable output voltage via high-speed I2C interface
• Synchronous buck topology for high efficiency
• Compact WLCSP package design for space-constrained applications

Voltage Regulators - DC DC Switching Regulators Applications

• Cloud systems computing power management
• Portable electronic devices requiring efficient DC-DC conversion
• Embedded systems with strict size limitations

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix code against the manufacturer's latest datasheet to confirm exact output voltage ranges and pin configurations. Confirm availability status as distribution channels may list obsolete or end-of-life variants. Ensure compatibility with your system's I2C clock speed requirements before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a 5 A output current capability is required within a minimal board area constraint. The fixed 2.4 MHz frequency allows for smaller passive components compared to lower-frequency regulators. Ensure the application input voltage remains within the 2.5 V to 5.5 V operational window for reliable performance.

Voltage Regulators - DC DC Switching Regulators Part Context

This regulator belongs to the TinyBuck family, designed for high-density power solutions. It integrates synchronous rectification to minimize external component count. The WLCSP packaging utilizes flip-chip technology to reduce thermal resistance and profile height compared to traditional BGA packages.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

FAN53555BUC24X offers similar functionality with a 4 A output current rating.