I'm having trouble with MCP73833. It's 1S lipo charger powered from USB. I followed this figure from application note:
Battery connectors are X4 and X5, load is connected, USB is disconnected,
The problem is on the line marked in my schematic I measure 2.1V. I don't know what might be wrong with this design and how it can get in there. D5 schottky diode prevents this situation. Also its not IRLML2244 fault. MCP73833 10, 9 pins are the only way. I checked block diagram of MCP73833 and the only thing that bothers me is the Direction Control. Is there a option that it might get though Vbat and appear on VDD?
The question is: How 2.1V appeared on marked line?