I have a TPS659112 on a new design PCB. I have verified the following things:
- VCC7 = 6.3V
- VCCS = 3.56V
- VRTC = 18.V
- VCCIO = 5.34V
I have grounded VBACKUP which may or may not be the proper thing to do. I can see a 32kHz oscillator input on OSC32KIN (which I believe is not required since it has the RC oscillator internally). I do not see output on CLK32KOUT, however.
My expectation is that the PMIC would autostart, but it does not appear to be doing so -- the outputs of other regulators I've checked to not appear to be on. VDDIO, for example, has 20mV or so on it. Control pin schematic below:
Any ideas why the part will not autostart?