MMPF0100 datasheet(47/136 Pages) FREESCALE

47 / 136 page

Analog Integrated Circuit Device Data

Freescale Semiconductor

PF0100

Functional Block Requirements and Behaviors

Power Generation

SW1A/B/C External Components

Table 50. Register SW1CMODE - ADDR 0x31

Name

Bit #

R/W

Default

Description

SW1CMODE

3:0

R/W

0x80

Sets the SW1C switching operation mode.

See Table 29 for all possible configurations.

UNUSED

–

0x00

UNUSED

SW1COMODE

R/W

0x00

Set status of SW1C when in Sleep mode

0 = OFF

1 = PFM

UNUSED

7:6

–

0x00

UNUSED

Table 51. Register SW1CCONF - ADDR 0x32

Name

Bit #

R/W

Default

Description

SW1CILIM

R/W

0x00

SW1C current limit level selection

0 = High level current limit

1 = Low level current limit

UNUSED

R/W

0x00

Unused

SW1CFREQ

3:2

R/W

0x00

SW1C switching frequency selector.

See Table 37.

SW1CPHASE

5:4

R/W

0x00

SW1C Phase clock selection.

See Table 35.

SW1CDVSSPEED

7:6

R/W

0x00

SW1C DVS speed selection.

See Table 33.

Table 52. SW1A/B/C External Component Recommendations

Mode

Components

Description

A/B/C Single

Phase

A/B Single - C

Independent Mode

A/B Dual - C

Independent Mode

CINSW1A(32)

SW1A Input capacitor

4.7

μF4.7 μF4.7 μF

CIN1AHF(32)

SW1A Decoupling input capacitor

0.1

μF0.1 μF0.1 μF

CINSW1B(32)

SW1B Input capacitor

4.7

μF4.7 μF4.7 μF

CIN1BHF(32)

SW1B Decoupling input capacitor

0.1

μF0.1 μF0.1 μF

CINSW1C(32)

SW1C Input capacitor

4.7

μF4.7 μF4.7 μF

CIN1CHF(32)

SW1C Decoupling input capacitor

0.1

μF0.1 μF0.1 μF

COSW1AB(32)

SW1A/B Output capacitor

6 x 22

μF4 x 22 μF

4 x 22

μF

COSW1C(32)

SW1C Output capacitor

–

2 x 22

μF

2 x 22

μF

LSW1A

SW1A Inductor

1.0

μH

DCR = 12 m

ISAT = 4.5 A

1.0

μH

DCR = 12 m

ISAT = 4.5 A

1.0

μH

DCR = 60 m

ISAT = 2.4 A

LSW1B

SW1B Inductor

–

1.0

μH

DCR = 60 m

ISAT = 2.4 A

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