FAN21SV04MPX

Description：IC REG BUCK ADJ 4A 25MLP
Series：TinyBuck®
Mfr：onsemi
Package：Tape & Reel (TR)

SKU:865c8a79c513 Category: Voltage Regulators - DC DC Switching Regulators Brand: onsemi

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Product introduction

Product Detailed Parameters

Description：IC REG BUCK ADJ 4A 25MLP
Series：TinyBuck®
Mfr：onsemi
Package：Tape & Reel (TR)
Function：Step-Down
Output Configuration：Positive
Topology：Buck
Output Type：Adjustable
Number of Outputs：1
Voltage - Input (Min)：3V
Voltage - Input (Max)：24V
Voltage - Output (Min/Fixed)：0.8V
Voltage - Output (Max)：19.2V
Current - Output：4A
Frequency - Switching：200kHz ~ 600kHz
Synchronous Rectifier：Yes
Operating Temperature：-10°C ~ 85°C (TA)
Mounting Type：Surface Mount
Package / Case：25-WQFN Exposed Pad
Supplier Device Package：25-MLP (6x5)
Grade：-
Qualification：-

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FAN21SV04MPX

Overview

The FAN21SV04MPX is a TinyBuck single-input integrated synchronous buck regulator manufactured by onsemi. It operates with an input voltage range up to 24 V and delivers a maximum output current of 4 A. The device features adjustable output voltages starting from 0.8 V. It utilizes a fixed switching frequency architecture and is housed in a compact 25-WQFN exposed pad package designed for surface-mount installation.

Feature Summary

Integrates high-side and low-side power switches within a single synchronous buck topology
Features TinyBuck form factor for minimal printed circuit board footprint requirements
Supports wide input voltage ranges suitable for various bus architectures

Applications

Point-of-load regulation for embedded systems
Power supply stages for industrial equipment
Voltage conversion for communication infrastructure modules

Procurement Notes

Verify the specific suffix MPX against the official onsemi datasheet to confirm package type and tape-and-reel specifications. Confirm end-of-life status or obsolescence notices prior to finalizing design-in decisions, as availability may be restricted. Ensure thermal management strategies align with the MLP-25 package capabilities under maximum load conditions.

Selection Notes

Select this component when space-constrained designs require a high-efficiency synchronous solution without external MOSFETs. Compare against the FAN2106EMPX if higher current capacity is needed. Evaluate the fixed frequency operation against applications requiring variable frequency synchronization. Verify that the 0.8 V minimum output voltage meets the target rail requirements.

Part Context

This part belongs to the TinyBuck family of power management integrated circuits from onsemi. These devices are engineered to provide high efficiency in small footprints. The series targets applications where board real estate is limited but robust power delivery is essential. It complements other PMIC offerings in the onsemi portfolio focused on compact DC-DC conversion.