Lower current in deep sleep | Cypress Semiconductor
Lower current in deep sleep
I have a low powered application using PSOC4200 powered by 3V battery.
The application has the micro and 2 other ICs on the PCB.
The other 2 ICs combined draw 12uA. Currently I put the micro into deep sleep and all I need is to wake on an interrupt on a Pin state change.
I have measured total current around 60uA, this implies the 4200 is drawing 48uA instead of the 1.3-15uA suggested in the low power guide.
I do have the LVP enabled as I want to know if battery gets low. IIf this is drawing current then I could stop the LVP int before deep sleep and start again on wake.
I have SPI being used when wake and also a timer interrupt that is stopped before putting to deep sleep.
My target is 30uA total for the circuit (around 15-20uA for 4200 would do the trick).