The XLSEMI XL4201 datasheet details a 3 A, 150 kHz buck DC/DC converter with 8‑40 V input, adjustable 1.25‑37 V output, and built‑in protections.
The XL4201 is a fixed‑frequency (150 kHz) PWM buck converter that delivers up to 3 A switching current while maintaining high efficiency and low ripple. It operates from an 8 V to 40 V input range and provides an adjustable output from 1.25 V to 37 V with a minimum dropout of 0.3 V.
Typical applications include car chargers, battery chargers, LCD monitors/TVs, portable instrument power supplies, and telecom/networking equipment. The device integrates internal MOSFET, thermal shutdown, current limit, and input over‑voltage protection, reducing external component count.
| Input Voltage Range | 8 V – 40 V |
|---|---|
| Output Voltage Range | 1.25 V – 37 V (adjustable) |
| Switching Frequency | 150 kHz (fixed) |
| Maximum Switching Current | 3 A |
| Minimum Drop‑Out Voltage | 0.3 V |
The XL4201 operates from 8 V to 40 V input.
It uses a fixed 150 kHz switching frequency.