FAN53555BUC05X

Description：IC REG BUCK PROG 5A 20WLCSP
Series：TinyBuck®
Mfr：onsemi
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:c0a27feafeb2 Category: Voltage Regulators - DC DC Switching Regulators Brand: onsemi

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Product introduction

FAN53555BUC05X is listed in the Voltage Regulators - DC DC Switching Regulators range at ChipApex. The manufacturer field lists onsemi. Its product description is IC REG BUCK PROG 5A 20WLCSP. Review the specifications below when checking this part for your BOM.

Voltage Regulators - DC DC Switching Regulators specifications for FAN53555BUC05X

Description：IC REG BUCK PROG 5A 20WLCSP
Series：TinyBuck®
Mfr：onsemi
Package：Tape & Reel (TR),Cut Tape (CT)
Function：Step-Down
Output Configuration：Positive
Topology：Buck
Output Type：Programmable
Number of Outputs：1
Voltage - Input (Min)：2.5V
Voltage - Input (Max)：5.5V
Voltage - Output (Min/Fixed)：0.6V
Voltage - Output (Max)：1.23V
Current - Output：5A
Frequency - Switching：2.4MHz
Synchronous Rectifier：Yes
Operating Temperature：-40°C ~ 85°C (TA)
Mounting Type：Surface Mount
Package / Case：20-UFBGA, WLCSP
Supplier Device Package：20-WLCSP (1.96x1.56)
Grade：-
Qualification：-

Voltage Regulators - DC DC Switching Regulators datasheet and documents for FAN53555BUC05X

FAN53555BUC05X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN53555BUC05X is a synchronous buck switching regulator from onsemi’s TinyBuck family, housed in a 20-WLCSP package. It delivers up to 5 A output current with an input voltage range of 2.5 V to 5.5 V. The device features a fixed 0.9 V output and operates at a 2.4 MHz switching frequency. It supports programmable soft-start and includes comprehensive protection mechanisms such as overcurrent, thermal shutdown, and undervoltage lockout.

Voltage Regulators - DC DC Switching Regulators Feature Summary

Integrated synchronous rectification for high efficiency
Digitally programmable control interface
Compact wafer-level chip scale packaging

Voltage Regulators - DC DC Switching Regulators Applications

Portable electronic devices requiring compact power solutions
Embedded systems with single-rail power distribution
Battery-powered equipment needing efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against official datasheets to confirm output voltage and package variations. Confirm RoHS compliance status and moisture sensitivity levels prior to assembly. Check for obsolescence notices or lifecycle changes directly from the manufacturer. Ensure ordering quantities align with standard reel sizes specified in procurement catalogs.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 0.9 V output is required alongside high current capability. The 2.4 MHz frequency allows for smaller external passive components compared to lower-frequency alternatives. Evaluate thermal performance requirements given the small WLCSP footprint and 5 A load capacity.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the TinyBuck series designed for space-constrained applications. It replaces older linear regulators or larger switching controllers by integrating power switches and control logic into a minimal footprint. The family emphasizes digital programmability and high efficiency for mobile and industrial portable electronics.