I am using the DC2973A Demonstration Board to evaluate the LTC3337 battery monitor.
I am using a Lab' PSU set to 2.9V and resistors to simulate a load; with all the IPK links set to 1 for 100mA peak load.
Our target has very low quiescent current, with periodic peaks when the device wakes up.
I initially used a 47K load, to simulate quiescent current, and the the system works as expected.
If I use a 47R resistor to simulate a running system at 60mA, the LTC3337 limits the current to about 20mA on power on and locks up in this state, with an output voltage of 0.97V.
However; if I power the system with the 47K load; and then use a switch to add the 47R in parallel with the 47K load; the PSU is sourcing 60mA and there is 2.75V across the load resistors.
Is this a one off problem with my DC2976A board, or is this a limitation of the LTC3337 device?