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WEBENCH® Tools/TPS61178: TPS611781 Vout issue

Part Number: TPS61178
Other Parts Discussed in Thread: TPS61022

Tool/software: WEBENCH® Design Tools

Hello Sir,

I use the TPS611781 for a 5V output without load disconnect function design, and the EN pin is PD/100K to GND to disable.

But use the 4.2V for Vin and got a 3.7V in the Vout when the EN pin is low, if add PU/3.3V on the EN pin and got the output is correct 5V.

Could you give me a advice for the PD EN pin and got the 3.7V in the Vout? 

Sincerely,

John