4.25V PMV65XP Q1 4.2V 2 AMPS MAX DC IN D S 15V MAX G 200.0K 205K 10K 1% A1 R5 1% R4 2 3 2.1v R1 + 1 TLV2401 _ 4 + 470pF LITHIUM ION C1 5 OR NiMH 2.2M 200.0K BATTERY 0.1uF 1% R3 C2 R6 200.0K 1% 5 R2 1 IDEAL DIODE CIRCUIT MAINTAINS 0.05V DROP FROM INPUT TO OUTPUT FET TURNS OFF WHEN OUTPUT VOLTAGE EXCEEDS