FAN53555BUC09X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN53555BUC09X is a digitally programmable synchronous buck switching regulator manufactured by onsemi, formerly Fairchild Semiconductor. It operates with an input voltage range of 2.5V to 5.5V and provides a single positive output adjustable from 0.603V to 1.41V. The device supports a maximum output current of 3A and utilizes a fixed switching frequency of 2.4MHz. It is housed in a compact 20-WLCSP package measuring 1.96x1.56mm. The component functions within an operating temperature range of -40°C to 85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Digitally programmable output voltage via I²C interface for dynamic adjustment
• Integrated synchronous rectification with built-in high-side and low-side MOSFETs
• Automatic transition between PWM and PFM modes to optimize efficiency across load conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Portable computing systems requiring efficient core voltage regulation
• Smartphones and mobile devices needing compact power management solutions
• Embedded systems utilizing digital voltage scaling for performance optimization

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation carefully, as production has transferred from Fairchild Semiconductor to onsemi. Confirm the specific suffix indicates the 3A variant rather than the 5A version. Check for End-of-Life status notifications or Product Change Notices regarding availability and sourcing channels before finalizing procurement plans.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact footprint is required alongside precise digital voltage control capabilities. Ensure the application demands an output current within the 3A limit. Verify that the system architecture supports I²C communication for programming the output voltage levels dynamically during operation.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the TinyBuck family of switching regulators designed for space-constrained portable electronics. The series integrates control logic and power stages into a minimal package size. It addresses the need for high efficiency and small board area in modern mobile and embedded applications.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The FAN53555BUC09X is listed as obsolete. Consider the FAN53526UC00X as a potential alternative if specifications align with the application requirements.