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WEBENCH® Tools/TPS61088: Disable the TPS61088 with the ENABLE pin, it is not working!

Leo86
Intellectual 255 points
Part Number: TPS61088
Other Parts Discussed in Thread: TPS61178

Tool/software: WEBENCH® Design Tools


Why when I set the ENABLE of the TPS61088 to logic level "0", the VOUT output is not set to zero, disabling the output?

By placing "0" on the TPS61088's ENABLE pin I expected his output to go to 0 volts (VOUT pin) as well. Why doesn't that happen?

  • 0
    TI__Mastermind 40080 points

    Dear Sir,

    Please check the block diagram in the datasheet: For the upper side FET, there's a body diode inside the IC, which makes the Vin connects with Vout even the silicon is disabled.

    If you need load disconnect function, you can change to TPS61178.