FAN53526UC84X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN53526UC84X is a digitally programmable TinyBuck synchronous step-down switching regulator manufactured by onsemi (formerly Fairchild Semiconductor). 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, though it supports up to 3.4 MHz operation. Output voltage is digitally programmable via an I²C interface, ranging from 600 mV to 1.39375 V in 6.25 mV steps. Key electrical parameters include a typical quiescent current of 50 µA in PFM mode and a shutdown supply current of less than 1 µA. The component is housed in a 15-ball WLCSP package measuring 1.310 mm x 2.015 mm with a 0.4 mm pitch.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Digitally programmable output voltage via I²C interface allows flexible system configuration without external resistor dividers.
• Synchronous rectification architecture provides high efficiency across load ranges, maintaining performance at light loads through PFM mode.
• Integrated protection mechanisms include thermal shutdown and overload protection to ensure operational reliability.
• Compact WLCSP packaging minimizes board space requirements while supporting surface-mount assembly.

Voltage Regulators - DC DC Switching Regulators Applications

• Powering ARM, Tegra, OMAP, NovaThor, ARMADA, and Krait processors
• Supplying graphics and DSP processors
• General-purpose digital logic power distribution

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer status carefully, as official documentation indicates the FAN53526 series may be obsolete or nearing end-of-life. Confirm that the specific suffix UC84X corresponds to the required output voltage setting and package variant. Ensure compatibility with existing PCB footprints for the 15-ball WLCSP format. Check for alternative sources if long-term supply stability is required for production.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact, high-efficiency buck converter is needed for processor cores requiring precise digital voltage control. The 3 A output capability suits moderate-power applications. Consider the 2.4 MHz default frequency for reduced external component count. Verify that the I²C interface speed and address configuration meet system bus requirements. Evaluate thermal performance within the WLCSP package constraints for the intended enclosure.

Voltage Regulators - DC DC Switching Regulators Part Context

The FAN53526 belongs to onsemi's TinyBuck family of digitally programmable regulators. This series is designed for portable electronics and computing applications requiring small form factors and efficient power management. The device integrates synchronous switches and control logic into a minimal footprint, distinguishing it from traditional analog-regulated counterparts that require external feedback networks.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult onsemi application notes for cross-reference recommendations based on specific voltage and current requirements.