FAN53526UC128X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN53526UC128X is a digitally programmable synchronous buck converter from onsemi's TinyBuck family. It operates with an input voltage range of 2.5 V to 5.5 V and delivers up to 3 A output current. The device features a fixed switching frequency of 2.4 MHz and provides an adjustable output voltage between 600 mV and 1.393 V. Packaged in a WLCSP-15 format, it supports shutdown functionality and maintains a quiescent current of 50 uA across 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 precise power rail configuration
• Integrated synchronous rectification topology ensures high efficiency at light and heavy loads
• Compact WLCSP-15 footprint minimizes printed circuit board area requirements
• Fixed 2.4 MHz switching frequency enables the use of small external passive components

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics requiring compact power solutions
• System-on-module (SoM) core voltage regulation
• Embedded systems with strict space constraints
• Battery-powered devices needing efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify component authenticity through authorized distribution channels due to potential counterfeit risks. Confirm package integrity upon receipt as WLCSP components are sensitive to mechanical stress. Ensure storage conditions meet moisture sensitivity level requirements before reflow soldering. Cross-reference datasheet revisions to confirm pinout compatibility with existing designs.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this regulator when digital voltage adjustment is required within a limited spatial envelope. The 2.4 MHz frequency allows smaller inductors compared to lower-frequency alternatives. Verify that the load profile remains within the 3 A continuous current limit. Consider thermal performance in the final assembly as heat dissipation depends heavily on PCB copper area surrounding the WLCSP pads.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to onsemi's TinyBuck series, designed specifically for applications demanding minimal solution size. The FAN53526 variant integrates control logic and power switches into a single chip. It replaces discrete MOSFET solutions by providing a complete step-down regulator in a wafer-level package. The series emphasizes ease of integration for mobile and IoT platforms.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Check for FAN53526UC168X if different output voltage ranges are needed. Verify pin-to-pin compatibility with legacy Fairchild Semiconductor parts before substitution. Ensure equivalent thermal characteristics and switching frequencies when replacing with other manufacturers' WLCSP buck converters.