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TPS63031: High current consumption than shown in the quesient current colomn

Dhanish Vijayan1
Prodigy 10 points
Part Number: TPS63031

Hi, 

I am using TPS63031 to power a 3.3Volt circuit from a Lithium ION battery of 3.7 Volt. The circuit is mostly in low power mode consuming 5uA current. 

When I tested the current consumption of TPS63031, it seems like 5 mA is being consumed. I was hoping to have a consumption of 25uA after referring to the quiescent current value. I am not sure if I misinterpreted the value. 

The circuit I used is shown below

I used the NR3015T1R5N inductor for L1. And capacitors are X5R/X7R type 0805 packages.
Please let me know if I can reduce the power consumption to a minimum, and what is the minimum attainable low power consumption. 

  • 0
    TI__Mastermind 21565 points

    Hi Dhanish:

    How about enable the power save mode? Just connect the PS pin to ground, It can save power when load is light. 

    "The PS/SYNC pin can be used to select different operation modes. To enable power-save, PS/SYNC must be set low. Power-save mode is used to improve efficiency at light load. If power-save mode is enabled, the converter stops operating if the average inductor current gets lower than about 100 mA and the output voltage is at or above its nominal value. If the output voltage decreases below its nominal value, the device ramps up the output voltage again by starting operation using a programmed average inductor current higher than required by the current load condition. Operation can last for one or several pulses. The converter again stops operating once the conditions for stopping operation are met again."