Load Switch Explained. How it Works?

✅ Thanks to ROHM Semiconductor for sponsoring this video!
Compact and low on-resistance MOSFET introduced in this video
https://www.rohm.com/products/mosfets/small-signal/dual/aw2k21-product

Peripheral circuit design
https://fscdn.rohm.com/jp/products/databook/applinote/discrete/transistor/mosfet/dual_mosfet_aw2k21_an-j.pdf

Article that summarizes the characteristics of the MOSFET
https://www.rohm.co.jp/news-detail?news-title=2025-04-15_news_mosfet&defaultGroupId=false

This MOSFET is now on sale.
https://www.rohm.com/distribution/-/dinventory/AW2K21AR/sample/0

If you’d like to get something from AliExpress, it would really help me out if you used this link!
I’ll use any affiliate earnings to help keep my projects going.
https://s.click.aliexpress.com/e/_c3WMnib1

◤Products used in this video◢ (includes affiliate links)
Oscilloscope: Teledyne LeCroy HDO6104B 1GHz model https://ja.teledynelecroy.com/oscilloscope/hdo6000.aspx

◤Contents◢
0:00 Today’s Video Is About MOSFETs for Load Switches
0:54 What Is a Load Switch?
1:49 Circuit with Pch-MOSFET
2:12 Circuit with Nch-MOSFET
2:41 Reverse Current Protection Is Necessary
4:38 Reverse Current Protection Without Diodes
7:15 Introduction of MOSFET Used in This Video
9:15 Try Using MOSFET in Load Switch
10:21 Current Waveform
10:55 Heat Generation
12:13 Summary

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