LP3921

SNVS580A – AUGUST 2008 – REVISED MAY 2013

www.ti.com

The following table summarizes the supported output voltages for the LP3921. Default voltages after startup are

highlighted in bold.

Table 4. LDO Output Voltage Programming

Data Code

LDO1

LDO2

VLDO3

LDO4

LDO5

LDO6

LDO7

LDOx PGM

(V)

(V)

(V)

(V)

(V)

(V)

(V)

O/P

8h'00

1.5

1.5

1.5

8h'01

1.8

1.8

1.8

8h'02

1.85

1.85

1.85

8h'03

2.5

2.5

2.5

2.5

8h'04

2.6

2.6

2.6

2.6

8h'05

2.7

2.7

2.7

2.7

2.7

2.7

2.7

8h'06

2.75

2.75

2.75

2.75

2.75

2.75

2.75

8h'07

2.8

2.8

2.8

2.8

2.8

2.8

2.8

8h'08

2.85

2.85

2.85

2.85

2.85

2.85

2.85

8h'09

2.9

2.9

2.9

2.9

2.9

2.9

2.9

8h'0A

2.95

2.95

2.95

2.95

2.95

2.95

2.95

8h'0B

3.0

3.0

3.0

3.0

3.0

3.0

3.0

8h'0C

3.05

3.05

3.05

3.05

3.05

3.05

3.05

8h'0D

3.1

3.1

3.1

3.1

8h'0E

3.2

3.2

3.2

3.2

8h'0F

3.3

3.3

3.3

3.3

The following table summarizes the supported charging current values for the LP3921. Default charge current

after startup is 100 mA.

Table 5. Charging Current Programming

Prog_Ichg[4]

Prog_Ichg[3

Prog_Ichg[2]

Prog_Ichg[1]

Prog_Ichg[0]

I_Charge I mA

0

0

0

0

0

50

0

0

0

0

1

100 (Default)

0

0

0

1

0

150

0

0

0

1

1

200

0

0

1

0

0

250

0

0

1

0

1

300

0

0

1

1

0

350

0

0

1

1

1

400

0

1

0

0

0

450

0

1

0

0

1

500

0

1

0

1

0

550

0

1

0

1

1

600

0

1

1

0

0

650

0

1

1

0

1

700

0

1

1

1

0

750

0

1

1

1

1

800

1

0

0

0

0

850

1

0

0

0

1

900

1

0

0

1

0

950

18

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