I've been working on board bring-up for a custom ESP32-S3FH4R2 (just the chip, not a module) PCB that I designed with low current consumption in mind. After uploading some deep sleep software, I found that the current consumption was approximately 1.5 mA (I was expecting roughly 60 uA including all other peripherals on the PCB).
After careful review of my schematic and lots of debugging, I realized that I had connected the VDD_SPI pin directly to 3.3V (doesn't appear to be done in other dev boards). After de-soldering the chip and cutting the trace to VDD_SPI and re-soldering the chip, I found that the board drew the expected 60 uA and functioned correctly.
Is this expected behavior that anyone else can verify? Per the S3 hardware design guidelines (section 3.1.1), it doesn't suggest that connecting VDD_SPI to 3.3V would be a problem according to this quote:
Thanks in advance for any guidance on this behavior!VDD_SPI can also be driven by an external power supply.