RE: npm1300 load switch and LDO

Menon — Tue, 09 Sep 2025 09:14:05 GMT

No worries, happy to help. Please don’t hesitate to create a new ticket if you encounter any other issues

RE: npm1300 load switch and LDO

Samno — Mon, 08 Sep 2025 13:32:00 GMT

Very helpful thank you.

RE: npm1300 load switch and LDO

Menon — Wed, 03 Sep 2025 20:57:39 GMT

Hello,

[quote user=""] In the example schematics the LDO is shown with an output capacitance of 20uF while the load switch has just 1uF.[/quote]

This is mentioned in the section about the LDO and load switch output capacitors. In LDO mode, the regulator requires a larger capacitor (around 20 µF) to remain stable and keep the output voltage steady when the load changes quickly. In contrast, in load-switch mode, the device simply acts as an on/off switch, so only a small capacitor (about 1 µF) is needed to ensure smooth turn-on and to avoid sudden changes in current. Also see the section Load Switches / LDO Regulators.

[quote user=""]Is the load switch just an LDO that can be switched on and off, like a high side switch? I[/quote]

No, I believe the section I pointed out already explains this.

[quote user=""]Is there any difference between the efficiency of the load switch and the LDO?[/quote]

There isn’t an efficiency curve provided, but you can compare the electrical specifications for load-switch mode and LDO mode to get an idea. See the Electrical Specification section under 6.4.1 (inside the data sheet):

In load-switch mode, you can pass up to 100 mA.
In LDO mode, you’re limited to 50 mA at higher Vout, and 10 mA at lower Vout.

Kind Regards,

Abhijith