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DRV2667: How to minimize current consumption.

Part Number: DRV2667

I am using the DRV2667 in a battery-powered device in which current is a major constraint. In my current setup, the waveform generator does not work if the current supplied is less than about 60 mA, though the boost converter works down to around 5 mA. I would like to know how the parameters of the design can be used to minimize the current needed to work. The following is the values I am currently using:

Vdd = 3.3V

Cvdd = 100u

Cbst = 0.1u

Creg = 1u

Cpump = 0.1u

R1 = 768k

R2 = 13k

Rext = 7.67k

L1 = 472u