FAN21SV04EMPX

Overview

The FAN21SV04EMPX is a single-output synchronous buck switching regulator from onsemi. It accepts an input voltage range of 3 V to 24 V and delivers up to 4 A of output current. The adjustable output voltage spans from 800 mV to 19.2 V. Operating with a fixed switching frequency of 300 kHz, the device functions within an ambient temperature range of -40 °C to +85 °C. It utilizes a 25-lead MLP package for surface-mount installation.

Feature Summary

• Integrates high-side and low-side power MOSFETs for synchronous rectification
• Supports wide input voltage ranges suitable for various bus architectures
• Includes internal compensation to simplify external component requirements

Applications

• Point-of-load regulation for industrial equipment
• Power distribution networks in embedded systems
• Voltage conversion for communication infrastructure modules

Procurement Notes

Verify the specific suffix EMPX against the manufacturer's official datasheet to confirm the exact package variant and tape-and-reel specifications. Confirm RoHS compliance status through the product compliance documentation provided by onsemi. Ensure the ordering information matches the current revision level to avoid integration errors during procurement.

Selection Notes

Select this component when a compact solution is required for converting higher bus voltages down to lower logic or peripheral levels. The integrated synchronous design offers improved efficiency compared to asynchronous alternatives. Verify that the thermal performance of the MLP package meets the system's heat dissipation requirements under maximum load conditions.

Part Context

This part belongs to the TinyBuck family of power management integrated circuits designed for space-constrained applications. It represents onsemi's approach to combining high power density with simplified design implementation. The series targets markets requiring reliable voltage regulation in small form factors without sacrificing current capability.

Replacement Considerations

Consult the official onsemi substitution guide for verified alternative part numbers. Cross-reference pinouts and electrical characteristics carefully before replacing components in existing designs.