FAN53526UC89X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN53526UC89X is a digitally programmable TinyBuck step-down regulator manufactured by onsemi. It operates with an input voltage range of 2.5 V to 5.5 V and delivers a continuous output current of 3 A. The device features a fixed switching frequency of 2.4 MHz, which minimizes external component requirements. Output voltage is digitally programmable via an I²C interface, ranging from 0.6 V to 1.39375 V in 6.25 mV steps. It includes pulse frequency modulation (PFM) for light-load efficiency, with a typical quiescent current of 50 µA. The regulator is housed in a 15-ball WLCSP package measuring 1.31 mm x 2.015 mm.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Digitally programmable output voltage via I²C interface with flexible slew rate control
• Synchronous buck topology providing high efficiency across load ranges
• Integrated PFM mode for low-power operation at light loads
• Compact 15-ball WLCSP packaging for space-constrained designs

Voltage Regulators - DC DC Switching Regulators Applications

• ARM-based processors and SoCs
• Mobile smartphones and tablets
• Portable gaming devices

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix UC89X against official datasheets to confirm the exact output voltage setting, as this variant differs from other FAN53526 models. Confirm RoHS compliance status through manufacturer documentation. Ensure compatibility with existing PCB footprints for the 15-ball WLCSP package. Check for end-of-life notices or obsolescence warnings prior to final design approval.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact, high-current synchronous buck converter is required for portable electronics. The fixed 2.4 MHz frequency simplifies filter design compared to adjustable frequency alternatives. Consider the I²C programming capability if dynamic voltage scaling is needed. Verify that the 3 A output current meets the peak demands of the target processor core under all operating conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the FAN53526 series of TinyBuck regulators, designed for mobile applications requiring small form factors. The series utilizes proprietary synchronous rectification technology to achieve high efficiency. Other variants in the family share similar electrical characteristics but may differ in fixed output voltages or packaging options.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other FAN53526 variants such as FAN53526UC168X or FAN53526UC288X, provided the fixed output voltage matches the system requirement. Cross-reference pinouts and thermal characteristics to ensure mechanical compatibility.