Hi,
I am using an LTC3225 for my application, which is only allowed to draw a current in the area of below 10 mA. Reading through the datasheet of the LTC3225, I couldn't find any hints for a minimum charging current (or a maximum value for RPROG), so I connected a 1.8 MOhms resistor to the RPROG pin, which should limit the loading current to 2 mA. However when I do that, the LTC3225 does not load with 2 mA (my application board as a whole only draws about 1.2 mA in this case), and when I changed the resistor to 360kOhms (hence setting the current to 10 mA), my board also only draws about 1.2 mA. When soldering a 36 kOhm resistor (corresponding to 100 mA), it works well.
What might be the problem?
