WM8994ECSSLASHR datasheet(230/363 Pages) CIRRUS

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WM8994

230

Rev 4.6

PARAMETER

SYMBOL

CONDITION

MIN

TYP

MAX

UNITS

LDO1 Start-Up Time

tLDO1_START

VREFC Cap = 1 uF

AVDD1 Cap = 4.7uF

1.5

LDO1 Cycle Time

tLDO1_CYCLE

LDO2 Start-Up Time

tLDO2_START

VREFC Cap = 1 uF

DCVDD Cap = 1uF

1.5

LDO2 Cycle Time

tLDO2_CYCLE

Table 130 LDO Timing

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R59 (003Bh)

LDO 1

3:1

LDO1_VSEL [2:0]

110

LDO1 Output Voltage Select

2.4V to 3.1V in 100mV steps

000 = 2.4V

001 = 2.5V

010 = 2.6V

011 = 2.7V

100 = 2.8V

101 = 2.9V

110 = 3.0V

111 = 3.1V

LDO1_DISCH

LDO1 Discharge Select

0 = LDO1 floating when disabled

1 = LDO1 discharged when

disabled

R60

(003Ch)

LDO 2

2:1

LDO2_VSEL [1:0]

LDO2 Output Voltage Select

0.9V to 1.2V in 100mV steps

00 = 0.9V

01 = 1.0V

10 = 1.1V

11 = 1.2V

LDO2_DISCH

LDO2 Discharge Select

0 = LDO2 floating when disabled

1 = LDO2 discharged when

disabled

R1825

(0721h)

Pull Control

(2)

LDO2ENA_PD

LDO2ENA Pull-down enable

0 = Disabled

1 = Enabled

LDO1ENA_PD

LDO1ENA Pull-down enable

0 = Disabled

1 = Enabled

Table 131 LDO Regulator Control

WM8994ECS/R 数据表(PDF) 230 Page - Cirrus Logic

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