Help with power supply for i.MX RT1020

[MartinEnG]

Hello, I’m working on a custom design with an i.MX RT1020, but the documentation for using the internal DC/DC is somewhat confusing for me. Could you help me by reviewing my electrical connections and confirming if they are correct, please?

All the 3.3V connections are on the 3.3V supply rail shared across the entire PCB, but the other connections like VDD_ADC, USB_VBUS_CAP, NVCC_PLL, and all the others are not connected to anything; I only connected them to some test points.

[EdwinHz · Accepted solution]

Hi @MartinEnG,

I highly suggest you take a look at the Hardware Development Guide for the MIMXRT1020 if you haven't already. This document describes the hardware specifications that are required for the RT1020 to function properly. In this case, I have a few notes that do not follow this document:

• VDD_SOC_IN should be maximum 1.3V, rather than 3.3V
• VDD_HIGH_IN should be 3.3V.
• VDD_SNVS_IN should be 3.0V.

Also make sure to follow the capacitor specifications shown on "Table 2. Power supply decoupling recommendations ".

BR,
Edwin.

[MartinEnG]

Hellov @EdwinHz ,

Thank you for the response. I should have read the documentation before attempting to design this; my mistake. Thanks for the help.