Datasheet

DCDCconvertersstart
LDOsstart
dependingonsequencingoption
PB_IN=0
PB
_IN=0 (fallingedge
detect)
POWER_ON=0
PowerOFF
SYS = OFF
PowerOFF 2
SYS = ON
voltageat ACappliedOR
voltageatUSBappliedOR
PB_IN=0
AC=1 OR
USB=1
WAIT FOR
POWERON
SYS = ON
YES
NO
POWER
ON_1
SYS = ON
POWER
ON_2
SYS = ON
POWER_ON=1
PB_IN=1 &&
POWER_ON=1
POWER
OFF 3
SYS = ON
DCDCconverters
powerdown
LDOspowerdown
dependingon
sequencingoption
allvoltagespowereddown
voltageat ACappliedOR
voltageatUSBapplied
allvoltagespowereddown
TPS65070, TPS65072, TPS65073
TPS650731, TPS650732, TPS650701, TPS650702, TPS650721
SLVS950G JULY 2009REVISED MAY 2013
www.ti.com
PB_IN (Push-button IN)
This pin is the ON/OFF button for the PMU to leave OFF-state and enter ON-state by pulling this pin to GND.
Entering ON-state will first ramp the output voltage of the power path (SYS), load the default register settings and
start up the DCDC converters and LDOs with the sequencing defined. In ON-state, the I2C interface is active and
the wLED converter can be enabled. The system turns on if PB_IN is pulled LOW for >50ms (debounce time)
AND the output voltage of the power path manager is above the undervoltage lockout voltage (AVDD6 > 3V).
This is for Vbat>3V OR VAC>3V OR VUSB>3V. The default voltage for the undervoltage lockout voltage can be
changed with Bits <UVLO1>, <UVLO0> in register CON_CTRL2. The value will be valid until the device was
turned off completely by entering Off state. The system turns off if PB_IN is released OR the system voltage falls
below the undervoltage lockout voltage of 3V. This is the case when either the battery voltage drops below 3.0V
or the input voltage at the pins AC or USB is below 3V. In order to keep the TPS6507x enabled after PB_IN is
released HIGH, there is an input pin called POWER_ON which needs to be pulled HIGH before the PB_IN button
is released. POWER_ON=HIGH will typically be asserted by the application processor to keep the PMU in ON-
state after the power button at PB_IN is released.
In addition to this, there is a 15s timer which will drive PGOOD=LOW for 0.5ms when 15s are expired. The 15s
timer is enabled again when PB_IN is released HIGH. If PB_IN is pulled LOW for 30s continuously, PGOOD will
be driven LOW only once after the first 15s. When PGOOD is driven LOW due to PB_IN=low for 15s, all
registers in TPS6507x are set to their default value. See Figure 33.
Figure 33. State Machine
34 Submit Documentation Feedback Copyright © 2009–2013, Texas Instruments Incorporated
Product Folder Links: TPS65070 TPS65072 TPS65073 TPS650731 TPS650732 TPS650701 TPS650702
TPS650721