念慈菴

4A, 850kHz fixed frequency PWM synchronous buck demonstration board with enable function based on ST1S41IPHR

STEVAL-ISA107V1

 
Overview

The STEVAL-ISA107V1 is a product evaluation board to aid in testing and designing with the ST1S41 in an SO-8 ePad package. The application is an internally-compensated 850 kHz fixed-frequency PWM synchronous step-down converter.

The ST1S41 operates from 4.0 V to 18 V input, while it regulates an output voltage as low as 0.8 V and up to VIN (100% duty-cycle).
The ST1S41 integrates a 95 mΩ high side switch and a 69 mΩ low side synchronous rectifier allowing very high efficiency with very low output voltages. The peak current mode control with internal compensation delivers very compact solution with a minimum component count.

Main features

  • 4.0 V to 18 V input voltage
  • Output voltage adjustable from 0.8 V
  • 850 kHz switching frequency
  • Internal soft-start
  • Integrated 95 mΩ and 69 mΩ Power MOSFETs
  • All ceramic capacitor
  • Enable
  • Cycle by cycle current limiting
  • Current fold back short circuit protection
  • RoHS compliant
参考设计图片
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Update:2025-06-20 11:46:49

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