What volts can I supply the VBAT pin with?

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Gordon

Yes, sorry about that, it's a bit of a mess - I didn't realise quite how bad! Bit busy today but I'll make sure I update the Pico page soon to clarify what's happening with the power. For now:

Pico Board	Quick Reference	Circuit	Description
USB Plug		VUSB	USB voltage in
VCC	5V	5V	USB (minus diode voltage drop) if connected, Battery if not
Bat (also pad marked `+`)	BAT_IN	VBAT	Battery voltage input
3.3V	VDD	VDD	Regulated 3.3v output (~200mA)

Do you know what the device between the GATE/SRC/DRN pads is

Yes, it's a PFET (Q1 in the circuit). Basically it turns itself on when USB is disconnected, which means you can then run off a battery without any voltage drop (which you'd get if you just used a diode).

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What volts can I supply the VBAT pin with?

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