ACT8870QJ-T

REV 0 23-DEC-2016

34

Recommended External Components

The following components have been used with the ACT8870.

REFERENCE

DESCRIPTION

MANUFACTURER

Input Capacitor, Buck1

22uF, 6.3V, X5R

Samsung, CL10A226MQ8NRNC

Input Capacitor, Buck2/3/4

10uF, 10V, X5R

Samsung, CL10A106KP8NNNC

Input Capacitor, LDO1/2/3

1uF, 25V, X7R

Yageo, CC0603KRX7R8BB105

Output Capacitor, Buck1

2x22uF, 6.3V, X5R

Samsung, CL10A226MQ8NRNC

Output Capacitor, Buck2/3/4

22uF, 6.3V, X5R

Samsung, CL10A226MQ8NRNC

Output Capacitor, LDO1/2/3

1uF, 25V, X7R

Yageo, CC0603KRX7R8BB105

Inductor, Buck1

1uH, 10.8mohm

Coilcraft, XFL4020-102

Inductor, Buck2/3/4

1uH, 15mohm

Wurth, 74438356010

VIO_IN

100nF, 6.3V, X5R

Standard

VIN

1uF, 6,3V, X5R

Standard

CMI OPTIONS

This section provides the basic default configuration settings for each available ACT8870 CMI option. Refer to each

option’s application note for the comprehensive list of default settings

CMI 101

CMI 101 is optimized for Atmel SAMA5D2. Buck1 is not used in this application. Buck4 and LDO1 power the SAMA5D2

Group 2 power supply inputs. Buck2 and Buck3 power the Group 1 power supply inputs. LDO3 powers VDDFUSE

which is not part of Group 1 or Group 2. LDO2 provides 1.8V power for other parts of the system.

Sequencing

Rail

Active

Mode

Voltage

(V)

Sleep

Mode

Voltage

(V)

DVS

Voltage

(V)

DVS slew

rate (mV/us)

Nominal

Current (A)

Current

Limit

Setting(A)

Sequencing

Input

Trigger

StartUp

Delay (us)

Soft-Start

(us)

Buck 1

OFF

N/A

OFF

N/A

N/A

N/A

N/A

Buck 2

1.5

N/A

1.35

3.12

0.1

2

LDO3_PG

200

500

Buck 3

1.25

N/A

1.25

3.12

0.1

2

BUCK2_PG

700

700

Buck 4

3.3

N/A

3.3

3.12

0.1

2

VIN_UVLO

300

700

LDO1

3.3

N/A

3.3

NA

0.4

0.5

VIN_UVLO

100

613

LDO2

1.8

N/A

1.8

NA

0.05

0.2

BUCK4 PG

300

150

LDO3

2.5

N/A

2.5

NA

0.05

0.2

LDO2_PG

300

150