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TPS62120: Function of PMOS

Part Number: TPS62120
Other Parts Discussed in Thread: TPS62135,

Hello,

The specifications of the chip claim that it has a duty cycle of 100%. When controlling the internal switch, PMOS is used in the high side tube, but D connects Vin, S connects SW.

(1)Will this connection cause the diode keeping turn on?

(2) how to control PMOS conduction and turn off?

2.About TPS62135

The specification of the chip claims that it has a duty cycle of 100%. When controlling the internal switch, the high and low sides use NMOS. How to control the high side of the NMOS to keep turning on?