ACT88430 datasheet(53/74 Pages) QORVO

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Data Sheet Rev. G, August 2021 | Subject to change without notice

53 of 74

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ACT88430

Advanced PMU for Microcontrollers and Solid State Drive Applications

nRESET_AUX1

The nRESET_AUX1 pin is programmed as an open drain output. It goes high 1989us after Buck2 goes into regulation.

Set register 0x01h bit 7 to 1 if nRESET_AUX1 needs to stay high when the IC enters SLEEP Mode.

nRESET_AUX2

The nRESET pin is not used and should be pulled to GND.

EXT_PG

EXT_PG is configured as an input to select the Buck2 output voltage. When EXT_PG is L, VSET0 sets Buck2 to 1.5V.

When EXT_PG is H, VSET1 sets Buck2 to 1.35V.

MODE

The MODE pin configures Buck1 into either bypass or switcher mode. Connect MODE to AGND to configure Buck1

into switcher mode when VIN=5V. Connect MODE to VIN to configure Buck1 into bypass mode when VIN=3.3V.

GPIO

GPIO is configured as an input to select the Buck3 output voltage for different NAND memory voltages. When GPIO3

is H, VSET0 sets Buck3 to 1.8V. When GPIO3 is L, VSET1 sets Buck3 to 1.2V.

PWREN

PWREN is configured as an input. When PWREN = H, the IC operates in Active Mode. When PWREN = L, the IC

operates in SLEEP Mode. Note that Buck4 = 1.2V in Active Mode and 1.0V in SLEEP Mode.

Buck1/3 Voltage Setting

Buck1/3 reference voltage is 0.8V. This sets the programmable voltage range between 0.8V to 3.998V in 12.5mV

steps.

Buck2 Voltage Setting

Buck2 reference voltage is 0.6V. This sets the programmable voltage range between 0.6V to 3.000V in 9.375mV

steps.

LDO1 Voltage Setting

The LDO1 reference voltage is 0.8V. This sets the programmable voltage range between 2.0V to 3.575V in 25mV

steps.

LDO2/3 Voltage Setting

The LDO2/3 reference voltage is 0.6V. This sets the allowable voltage range between 0.8V to 2.375V in 25mV steps.

Device ID

The CMI 105 Device ID (register 0x7Dh) = 0x05h

I2C Address

The CMI 105 7-bit I2C address is 0x53h. This results in 0xA6h for a write address and 0xA7h for a read address.

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