ACT88320 datasheet(54/57 Pages) QORVO

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Data Sheet Rev. E, November 2019 | Subject to change without notice

54 of 57

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ACT88320

Advanced PMU with Inrush Control and Bypass Switch

Startup

Buck3

VIN

Buck2

Buck1

LDO2

CMI 109 Startup

nRESET

20ms

0.5ms

2.5ms

EXT_EN

0.5ms

GPIO1 (pin 13) - nRESET

GPIO1 is configured as an open drain nRESET. nRESET goes open drain 20ms after Buck3 goes into regulation.

GPIO2 (pin 14) – EXT_EN

GPIO2 is configured as an open drain EXT_EN. EXT_EN goes high 2.5ms after Buck2 goes into regulation. EXT_EN can be used

to sequence an external supply.

GPIO3 (pin 12) – nIRQ

GPIO3 is configured as an open drain nIRQ.

GPIO4 (pin 11) – DVS

GPIO4 is configured as a DVS input. Pulling the DVS input high makes the ACT88320 operate in Active mode with normal output

voltages. In Active mode, the buck converters operate with voltages set by their I2C VSET0 registers. Pulling the DVS input low makes

the IC operate in DVS mode. In DVS mode, the buck converters operate with voltages set by their VSET1 registers. Note that all

buck VSET0 and VSET1 registers are configured to the same default startup voltage.

SLEEP MODE

I2C default settings are SLEEP_MODE=1, SLEEP_EN=0, and SLEEP=0. Refer to the SLEEP State paragraph for details on how to

enter SLEEP Mode.

DPSLP MODE

I2C default settings are DPSLP_MODE=1, DPSLP_EN=0, and DPSLP=0. Refer to the DPSLP State paragraph for details on how to

enter SLEEP Mode.

VSYSMON

VSYSMON = 3.0V

Buck1 Voltage Setting

Buck 1 reference voltage is 0.8V. This sets the allowable voltage range between 0.8V and 3.998V in 12.5mV steps.

LDO Voltage Setting

The LDO reference voltage is 0.8V. This sets the allowable voltage range between 0.8V and 3.998V in 12.5mV steps.

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