Ultra Low Power Application without USB - what to do with VDDUSB?

gilberto-falker · ‎2025-09-16

Hi

We are working on a project based on the STM32U073CCT6. The USB interfaces is not need. How should I connect the VDDUSB pin in order to minimize tthe power consuption? Is it Ok to connect it do GND?

Br

Gilberto

AScha.3 · ‎2025-09-16

Hi,

read in ds...general/minimum working conditions.

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FBL · ‎2025-09-17

Hi @gilberto-falker

Check this article FAQ: Configuring the VDD50USB and VDD33USB pins on... - STMicroelectronics Community

It should be helpful.

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Andrew Neil · ‎2025-09-17

@gilberto-falker wrote:
The USB interfaces is not need

The STM32U0 series Product Selector lists 12 models with no USB.

Could you use one of them?

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

gilberto-falker · ‎2025-09-17

Hi

Models without usb have less flash memory