XLSEMI XL4201 Buck DC/DC Converter Datasheet

This datasheet details the XL4201, a 3A 150 KHz 40V buck DC/DC converter with constant current loop capability and internal protection features.

Brand: Xlsemi
Category: Other Electronics
Document type: Datasheet
Language: English
Pages: 14
File format: PDF
File size: 433 KB
Published: 22 October, 2026
Updated: 22 October, 2026
Model: XL4201
MD5 checksum: EED9D01521EE3A13DF0B0AA13753F079
PDF: XLSEMI XL4201 Buck DC/DC Converter Datasheet PDF

About this manual

The XLSEMI XL4201 is a fixed-frequency PWM buck (step-down) DC/DC converter operating at 150 kHz. It supports an input voltage range of 8V to 40V and provides adjustable output voltages from 1.25V to 37V, with a maximum switching current of 3A. The device includes internal optimization power MOSFETs and requires a minimum number of external components due to built-in frequency compensation.

What's inside

Features
Applications
Pin Configurations
Function Block Diagram
Typical Application Circuits
Ordering Information
Absolute Maximum Ratings
Electrical Characteristics

Specifications

Input Voltage Range	8V to 40V
Output Adjustable Range	1.25V to 37V
Switching Frequency	150 KHz
Maximum Switching Current	3A
Feedback Voltage Threshold	1.25V

Frequently asked questions

What are the recommended applications for the XL4201?

Recommended applications include Car Charger, Battery Charger, LCD Monitor and LCD TV, Portable instrument power supply, Telecom / Networking Equipment, Buck constant current driver, Monitor LED Backlighting, and General purpose LED lighting.

What is the minimum drop out voltage?

The XL4201 has a minimum drop out of 0.3V.

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