Datasheet

TPS65735
www.ti.com SLVSAI6–JUNE 2011
Figure 3-4. Bypassing Default TPS65735 Push Button SWITCH Timing
In a system where a different push-button SWITCH off timing is required, the SLEEP pin is used to control
the power off of the device. After system power up, the MCU must force the SLEEP pin to a high state
(V
SLEEP
> V
IH(PMIC)
). Once the SWITCH push-button is pressed to shut the system down, a timer in the
MCU should be active and counting the desired t
OFF
time of the device. Once this t
OFF
time is detected,
the MCU can assert the SLEEP signal to a logic low level (V
SLEEP
< V
IL(PMIC)
). It is on the falling edge of
the SLEEP signal where the system will be powered off (see Figure 3-5)
Figure 3-5. SWITCH Press and SLEEP Signal to Control System Power Off
Copyright © 2011, Texas Instruments Incorporated APPLICATION INFORMATION 29
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