LP8556 datasheet(42/63 Pages) TI1

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LP8556

SNVS871I – JULY 2012 – REVISED MARCH 2016

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8.6.2.12 CFG6

Address A6h

CFG6 REGISTER

BOOST_FREQ[1:0]

VBOOST[5:0]

NAME

BIT

ACCESS

DESCRIPTION

BOOST_FREQ

7:6

R/W

Set boost switching frequency when BOOST_FSET_EN = 0.

00 = 312 kHz

01 = 625 kHz

10 = 1250 kHz

11 = undefined

VBOOST

5:0

R/W

Boost output voltage. When ADAPTIVE = 1, this is the boost minimum and

initial voltage.

8.6.2.13 CFG7

Address A7h

CFG7 REGISTER

RESERVED

EN_DRV3

EN_DRV2

RESERVED

IBOOST_LIM[1:0]

NAME

BIT

ACCESS

DESCRIPTION

RESERVED

7:6

EN_DRV3

R/W

Selects boost driver strength to set boost slew rate. See EMI Reduction for

more detail.

0 = Driver3 disabled

1 = Driver3 enabled

EN_DRV2

R/W

Selects boost driver strength to set boost slew rate. See EMI Reduction for

more detail.

0 = Driver2 disabled

1 = Driver2 enabled

RESERVED

3:2

R/W

IBOOST_LIM

1:0

R/W

Select boost inductor current limit

(IBOOST_LIM_2X = 0 / IBOOST_LIM_2X = 1)

00 = 0.9 A / 1.6 A

01 = 1.2 A / 2.1 A

10 = 1.5 A / 2.6 A

11 = 1.8 A / not permitted

LP8556 数据表(PDF) 42 Page - Texas Instruments

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