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TPS74701: Bias voltage settings

Part Number: TPS74701


I'm using 2 x TPS75701 LDOs for different power rails as below. Note that for both rails i'm setting Vbias = 5V. Is that the right approach & what are the key consideration in setting the bias voltage?

1)      Vin= 2.5V, Vo= 1.5V/300mA

2)      Vin= 1.5V, Vo= 1.1V/200mA