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TPS63900: TI solution suggestion

Part Number: TPS63900
Other Parts Discussed in Thread: TPS61094

Dear Team,

Do we have any low iq solution can meet spec in one chip as below?

case 1 : input voltage 1.8V,output : 4V , output current 300mA 

case 2 : input voltage 1.8V,output : 3.3V , output current 600mA   

If not, could you help to suggest 2 solutions (low iq) can meet  each 2 spec.

Thanks a lot.

Jimmy