Datasheet

TPS23751

TPS23752

SLVSB97C –JULY 2012–REVISED JANUARY 2014

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: The V

pin connects to the negative rail of the input supply. It serves as a local ground for the PD control

circuitry. The PowerPAD™ must connect to V

to ensure proper operation.

WAKE (TPS23752 only): The WAKE pin performs several functions. During Sleep Mode, it outputs a current-

limited 2.5V. Pushing the external pushbutton (S

WAKE

in Figure 29) during Sleep Mode connects the WAKE pin to

optocoupler, OPTO6. An internal current comparator detects this excess current drawn by OPTO6 and re-

enables the DC-DC converter out of Sleep Mode. The WAKE pin now connects back to the internal pull-up

resistor (R

WKPLUP

in the Sleep Mode block diagram) to provide bias current for OPTO6. The optocoupler alerts

the system controller that the button has been pressed during sleep operation. Circuit board routing should

protect WAKE from noise sources on the board.

Product Folder Links: TPS23751 TPS23752