FAN5355UC00X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN5355UC00X is a synchronous step-down DC-DC converter from the TinyBuck family, manufactured by Fairchild Semiconductor. It integrates a PWM controller, driver, and MOSFETs to optimize performance in low-power applications. The device supports an output current of up to 800mA with a switching frequency of 3MHz. It operates within an input voltage range of 2.7V to 5.5V and provides a programmable output voltage between 0.75V and 1.975V. The component utilizes a 12-bump CSP package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates high-frequency synchronous step-down conversion with ultra-fast transient response capabilities
• Supports digitally programmable output voltage via I2C-compatible interface or pin selection
• Features smooth transition between Pulse Width Modulation (PWM) and Pulse Frequency Modulation (PFM) for high efficiency at light loads

Voltage Regulators - DC DC Switching Regulators Applications

• SmartReflex-compliant power supply systems
• Portable media players and digital cameras
• Cell phones and smart phones
• Micro DC-DC converter modules

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer origin, as ON Semiconductor acquired Fairchild Semiconductor's assets. Confirm the specific suffix 'UC00X' matches the required 800mA variant and 12-bump WLCSP package. Ensure compatibility with the intended I2C address and output voltage settings before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for designs requiring small passive components due to the 3MHz fixed-frequency operation. It is suitable for space-constrained portable electronics needing efficient power management. Consider the 800mA output limit when sizing the load requirements relative to other variants in the series.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the FAN5355 TinyBuck regulator series, designed for low-power applications using small, low-cost inductors and capacitors. The series includes variants supporting different output currents, such as 1A and 0.8A options, all sharing similar control architectures and package styles.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The FAN5355UC03X serves as a direct functional substitute within the same product family, offering identical topology and interface characteristics.