ESP32-P4: How to connect VDD_LP

The VDD_LP pin on the ESP32-P4 microcontroller is used to power the low-power domain of the chip, which includes the RTC (Real-Time Clock) and some other low-power peripherals.

Connect the VDD_LP pin to a 3.3V power supply. The permissible voltage range for this pin is from 3.0V to 3.6V (absolute maximum rating of 3.6V). Supplying a higher voltage than 3.6V may destroy the chip.

For most designs, you want to connect VDD_LP to the same 3.3V power supply as VDD_LDO and VDD_DCDCC.

Avoid connecting VDD_LP directly to the analog 3.3V supply, as this may introduce noise into the analog circuits powered by the analog 3.3V supply.

DO NOT CONFUSE THE VDD_LP PIN WITH THE VDD_HP pins. The VDD_HP pins ared 1.1V pins and will get damaged if you connect them to 3.3V. The VDD_LP pin is a 3.3V pin and will not work if you connect it to 1.1V.

Source: ESP32-P4 hardware design guide