KiCad Export
Thought for 7 sec
For this battery-powered sensor, U4 pin 7 (PS/SYNC) should normally connect to GND.
- GND/LOW: enables power-save mode, improving light-load and ESP32 sleep efficiency.
- 3V3/HIGH: forces PWM operation, giving lower ripple but consuming more standby current.
- It should not normally be powered from U4’s own 3V3 output, because that output is unavailable during startup.
Use 3V3 only if you deliberately need forced-PWM operation; otherwise connect pin 7 directly to GND.
check the current schematic, how is it now?
Thought for 4 sec
I’ll inspect U4 pin 7’s current net and verify the surrounding TPS63001 connections.
Worked for 26 sec
Currently, U4 pin 7 (PS/SYNC) is connected to the 3V3 net, along with VOUT and FB. That selects forced-PWM operation.
For this battery sensor, I recommend moving PS/SYNC to GND to enable power-save mode and reduce sleep/standby consumption. U4’s GND, PGND, and exposed pad are already connected to GND.
Fix and verify regulator
Move PS/SYNC to GND
Verify regulator wiring
Run schematic review
Explain power-save mode
