Other Parts Discussed in Thread: TPS61200
Schematic/layout are below. Tested on multiple boards and platforms (even a modular platform which doesn't have any load connected on the boost output). Problem is high static power consumption (9-10 mA) of boost when enabled and no load attached (power save is disabled: PS connected to input). EN is pulled down (100k) and controlled by a 2.8V powered host. UVLO is disabled (connected to VAUX). Following is the details of the tests and my findings. Any help would be greatly appreciated!
Normal usage:
INPUT: Lithium Polymer battery (3V - 4.2V)
OUTPUT: 5V, max load 700 mA
Test 1)
INPUT: Li-Po battery with Voc = 3.8V
OUTPUT: 5V, no load (floating)
When the host enables the boost, it sinks 9-10 mA of static current (JP4). Expected 70 - 100 uA.
Test 2)
INPUT: Floating
OUTPUT: Lab power supply 5V (max current set at 200 mA)
When the host enables the boost, it sinks 12 uA of static current in the output supply (JP6)
Test 3)
INPUT: Lab power supply 3.8V input (max current set at 200 mA)
OUTPUT: 5V, no load (floating)
When the host enables the boost, it sinks 9-10 mA of static current (JP4).
