ACT88326VA datasheet(39/41 Pages) ACTIVE-SEMI

39 / 41 page

ACT88326VA

Rev 1.0, 29-May-2018

Innovative PowerTM

www.active-semi.com

ActiveSwitcherTM is a trademark of Active-Semi.

Buck1

Buck2

Buck3

LDO1

LDO2

1ms

100ms

LSG1

GPIO1

GPIO3

1ms

4ms

CMI 102 Startup

nRESET

1ms

I2C Address

The ACT88326 7-bit I2C address is 0x25h. Use address 0x4Ah when writing and 0x4Bh when reading.

GPIO1 (pin C7) – EXT_EN1

GPIO1 is configured as an open drain output to enable an external power supply. At power up, GPIO1 goes high when

Buck1 goes high. After power up, GPIO1 can be controlled via I2C to enable and disable the external power supply.

GPIO2 (pin C6) – EXT_EN2

GPIO2 is configured as an open drain output to enable an external power supply. At power up, GPIO2 goes high when

Buck1 goes high. After power up, GPIO2 can be controlled via I2C to enable and disable the external power supply.

GPIO3 (pin B6) – nIRQ

GPIO3 is configured as an open drain nIRQ output.

GPIO4 (pin D7) – nRESET

GPIO4 is configured as an open drain nRESET output. nRESET goes open drain 100ms after LDO2 goes into regulation.

During a turn off sequence, nRESET goes low 4ms before the outputs start to turn off.

SLEEP MODE

I2C default settings are SLEEP_MODE=0, SLEEP_EN=0, and SLEEP=0. This disables SLEEP mode. 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. This disables DPSLP mode. Refer to the

DPSLP State paragraph for details on how to enter DPSLP Mode.

ACT88326VA Datasheet(PDF) 39 Page - Active-Semi, Inc