Designed for Imax @ 750mA based on Datasheet (Figure 23 exact, except D1 is 1N5819 instead of BAT1000)
Rs = 200mOHM
Radj = open
Measurements
Vin = 5.9V (Voltage Drop across D1 is 0.301V)
Vrs = 15mV
Vadj = 2.975V
Vchg = 0.001V
Disconnected Battery Voltage = 0.688V (4.2V Li Ion battery pack containing 3 batteries)
Output Voltage, Vbat = 0.694 V !! instead of expected 5 V
Charge Current Starts at 2 mA and reduces to 0.12 mA !!
Part FZT549 used as external pass transistor is found to heat up also.
The circuit is supposed to produce an output of 5V and charge the connected battery. But as i have explained above, it is not. Kindly advise. How do i troubleshoot this ?
I've moved your post into the power management forum, where they can better serve your ADP2291 needs.