ACT8870 datasheet(40/49 Pages) QORVO

40 / 49 page

ACT8870

Advanced PMU for Microcontrollers

and Solid State Drive Applications

Data Sheet Rev. 7.0, Feb. 18, 2020 | Subject to change without notice

40 of 49

www.qorvo.com

Startup

Buck1

VIN

LDO2/3

Buck2

Buck3

0.7ms

Buck4

CMI 102 Startup

nRESET_AUX1

0.5ms

1.991ms

0.5ms

SLEEP Mode

Enter SLEEP Mode by pulling PWREN low. The IC operates in Active mode when PWREN is high. Note that in the

default configuration, nRESET_AUX1 goes low when the IC enters Sleep mode. If the user requires nRESET_AUX1 to

stay high in Sleep mode, write a 1 into register 0x00h, bit 7.

DVS Mode

CMI 102 does not include the DVS function. Note that the processor can change Buck2 and Buck3 output voltages on

the fly with EXT_PG and nRESET_AUX2. This effectively provides independent DVS control for these two outputs.

Buck2 VID Boot Voltage - EXT_PG

The EXT_PG input sets the Buck2 boot up voltage. When EXT_PG = 0, Buck2 = 1.5V. When EXT_PG = 1, Buck2 =

1.35V. EXT_PG changes Buck2 at startup and during normal operation.

Buck3 VID Boot Voltage - nRESET_AUX2

The nRESET_AUX2 input sets the Buck3 boot up voltage. When nRESET_AUX2 = 0, Buck3 = 1.2V. When

nRESET_AUX2 = 1, Buck3 = 1.8V. nRESET_AUX2 changes Buck3 at startup and during normal operation.

POK Thresholds

POK_UV = 4.25V

POK_OV = 5.7V

The PG pin is not functional with CMI 102. Leave the PG pin floating.

nRESET

nRESET is not functional in CMI 102. Leave the nRESET pin floating.

ACT8870 Datasheet(PDF) 40 Page - Qorvo, Inc