SLVA371A Datasheet, PDF (6/10 Pages) Texas Instruments – Powering Freon with TPS65070

Sequencing with TPS65070
PB_IN
PB_OUT
SYS
Level not defined as
voltage at pull-up has
not ramped at that time
50 ms debounce
Can be released high any time
after POWR_ON = High
50 ms debounce
POWER_ON
external LDO
(RTC_CVDD)
1.2V
VDCDC3
(CVDD)
1.2V
VLDO2
(SATA_VDD)
1.2V
VDCDC2
(VDDSHV)
3.3V
VLDO1
(SATA_VDDR)
1.8V
VDCDC1
(USB0_VDDA33)
3.3V
PGOOD
(nReset)
Asserted high by the application processor
any time while PB_IN = low to keep
the system alive
170 ms
250 ms
170 ms
250 ms
170 ms
250 ms
400 ms
Figure 3. Power-Up Sequencing Timing Diagram (3.3-V I/O)
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Powering Freon with TPS65070
SLVA371A – February 2010 – Revised April 2010
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