ACT8870 datasheet(42/49 Pages) QORVO

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ACT8870

Advanced PMU for Microcontrollers

and Solid State Drive Applications

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

42 of 49

www.qorvo.com

CMI 104: ACT8870QJ104-T

CMI 104 is optimized for Silicon Motion SM2246 solid state disk drive controllers. It incorporates boot voltage options

for Buck2 and Buck3 that allow it to be used with 1.5V or 1.35V DRAM VDDQ and with 1.2V or 1.8V NAND flash I/O.

SM2246 Configuration

The following table shows how to connect the ACT8870 outputs to the SM2246. The EXT_PG and nRESET_AUX2 input

settings define Buck2 and Buck3 default startup voltages.

SM2246 Voltage (V)

SM2246 Connections

EXT_PG Input Setting

n/a

n/a. EXT_PG sets Buck2 boot voltage

nRESET_AUX2 Input Setting

n/a

n/a. nRESET_AUX2 sets Buck3 boot voltage

Buck1

3.3

VCCF for Flash Die Power

Buck2

1.5/1.35

DRAM – DDR3

Buck3

1.2/1.8

VCCFQ for Flash I/O

Buck4

1.2

VCCK/A1V1

LDO1

3.3

A3V3 Analog Power

LDO2

1.8

VCCIO Power

LDO3

1.8

VCCIO Power

Sequencing

Rail

Active

Mode

Voltage (V)

Sleep

Mode

Voltage (V)

DVS

Voltage (V)

DVS

slew rate

(mV/us)

Current

Limit

Setting(A)

Sequencing

Input

Trigger

StartUp

Delay

(us)

Soft-

Start (us)

LDO1

3.3

N/A

0.5

VIN_UVLO

660

LDO2

1.8

N/A

0.2

VIN_UVLO

165

LDO3

1.8

N/A

0.2

VIN_UVLO

165

Buck4

1.2

N/A

3.5

LDO1

700

500

Buck1

3.3

OFF

N/A

5.3

Buck4

500

Buck3

1.2/1.8

OFF

N/A

Buck1

500

Buck2

1.5/1.35

OFF

N/A

Buck3

500

ACT8870 Datasheet(PDF) 42 Page - Qorvo, Inc

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