I have a design that uses the Fastrack Supreme 20 in a battery powered application. On power up the modem draws a narrow but very healthy current spike - 4 to 6 amps.
This is not a problem until the battery discharges some. The battery voltage drops during that turn on current spike, the V regulator on my PCB drops out of regulation, and my processor resets. This effect severely shortens uasable battery life
Has any body seen this problem?
What is the cause? I’m guessing large capacitors in the modem.
Any suggested fix?