PB_OUT

PB_IN

SYS

50msdebounce

50msdebounce

PGOOD

(nReset)

VDCDC1

(USB0_VDDA33)

3.3V

VDCDC2

(VDDSHV)

3.3V

VDCDC3

(CVDD)

1.2V

VLDO1

(SATA_VDDR)

1.8V

VLDO2

(SATA_VDD)

1.2V

externalLDO

(RTC_CVDD)

1.2V

POWER_ON

Levelnotdefinedas

voltageatpull-uphas

notrampedatthattime

Canbereleasedhighanytime

afterPOWR_ON=High

Assertedhighbytheapplicationprocessor

anytimewhile

=lowtokeep

thesystemalive

PB_IN

170 s

m

250 s

m

170 s

m

170 s

m

250 s

m

250 s

m

400ms

Sequencing with TPS65070

www.ti.com

Figure 3. Power-Up Sequencing Timing Diagram (3.3-V I/O)

6

Powering Freon with TPS65070

SLVA371A – February 2010 – Revised April 2010

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