supremeOne

4A, 850kHz fixed frequency PWM synchronous buck demonstration board based on ST1S41

STEVAL-ISA108V1

Overview

Based on the ST1S41 step-down switching regulator, the STEVAL-ISA108V1 demonstration board 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 V_IN(100% duty cycle).
The ST1S41 integrates a 95 mΩ high side switch and 69 mΩ low side synchronous rectifier, resulting in very high efficiency with very low output voltages.
The peak current mode control with internal compensation offers a compact solution with a minimum component count.

Main features

4 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 function
Cycle-by-cycle current limiting
Current fold-back short-circuit protection
RoHS compliant

Design Files

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

Hot

Technical Resources More

Search Datasheet?

Supported by EEWorld Datasheet

Technical Videos More

Forum More

Update:2025-06-20 10:58:06

Here I support "Teach you how to use UCOS step by step" and recommend three good books to you
Here are three must-read books for studying UCOS.1. (It is difficult to buy) Embedded Real-time Operating System UC/OS-II Tutorial, published by Xidian University - This book analyzes the source code
"Playing with the board" + Yu Zhennan's STM32 development board experiment 4
This content is originally created by EEWORLD forum user chenbingjy . If you want to reprint or use it for commercial purposes, you must obtain the author's consent and indicate the source.Chapter 8:
When CCS4.1.2 connects to the target board, a dialog box always pops up and then closes
At first I thought it was a computer problem, so I asked a senior to install it on his computer and it also had the same problem. Then I thought it was a 32-bit or 64-bit problem, so I found a 64-bit
A few questions when entering win ce for the first time
This is my first time to enter the wince module. I have a few questions. 1. If wince is embedded into a platform like ARM9, how much does the wince software cost? Can I use the software packages provi
Common operating problems of Qingyuefeng software----(PCB)
[b]1. I don't quite understand the naming of the two menus "Import" and "Open" in your software. Can you explain it? [/b] Answer: Open means opening the file saved by our software, while Import means
Latest TI C2000 Series Technical Seminar Schedule
TI C2000 Series Technical SeminarsC2000 devices are 32-bit microprocessors with high-performance integrated peripherals designed for real-time control applications. Its math-optimized core enables des

Datasheet More

Circuits More