Other Parts Discussed in Thread: PMP41083,
Tool/software:
Greetings,
looking at the schematic of PMP41083 reference design. As far as I understand TPS25751 needs an external 3.3V supply to pin 38. Where does it come from?
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Hello,
The PMP41083 is a sink only design. LDO_3V3 and LDO_1V5 are supplied via the VBUS and not VIN_3V3. This is referred to as dead-battery mode.
https://www.ti.com/lit/ds/symlink/tps25751.pdf#page=30
Regards,
Chris