LP3923

SNVS567B – APRIL 2010 – REVISED MAY 2013

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Table 2. LDOs and Buck Default Voltages (for options LP3923TL/X and LP3923TL/X-VI)

Device

Type

Current

Enable

Input

Output(V)

Startup

Input

Output(V)

Startup

(mA)

control

default

default

SEL=BATT

SEL=GND

Buck

700

SI

VINB=BATT

2.0(1)

ON

VINB=BATT

1.8(1)

ON

LDO1

LILO

300

SI

VIN1=VBUCK

1.8

ON

VIN1=BATT

3

ON

LDO2

LILO

300

SI

VIN1=VBUCK

1.8

ON

VIN1=BATT

3

ON

LDO3

D

300

-

VIN2=BATT

3

ON

VIN2=BATT

3

ON

LDO4

A

80

TCXO_EN

VIN2=BATT

3

OFF

VIN2=BATT

3

OFF

LDO5

A

150

RX_EN

VIN2=BATT

3

OFF

VIN2=BATT

3

OFF

LDO6

A

150

TX_EN

VIN2=BATT

3

OFF

VIN2=BATT

3

OFF

LDO7

A

150

SI

VIN2=BATT

3

ON

VIN2=BATT

3

ON

LDO8

D

150

SI

VIN2=BATT

3

OFF

VIN2=BATT

3

OFF

(1)

Voltage is set by the external resistors.

Table 3. LDOs and Buck Default Voltages (for options LP3923TL/X-VB and LP3923TL/X-VC)

Device

Type

Current

Enable

Input

Output(V)

Startup

Input

Output(V)

Startup

(mA)

control

default

default

SEL=BATT

SEL=GND

Buck

700

SI

VINB=BATT

2.0(1)

ON

VINB=BATT

1.8(1)

ON

LDO1

LILO

300

SI

VIN1=VBUCK

1.8

ON

VIN1=BATT

3

OFF

LDO2

LILO

300

SI

VIN1=VBUCK

1.8

ON

VIN1=BATT

3

OFF

LDO3

D

300

-

VIN2=BATT

3

ON

VIN2=BATT

3

ON

LDO4

A

80

TCXO_EN

VIN2=BATT

3

OFF

VIN2=BATT

3

OFF

LDO5

A

150

RX_EN

VIN2=BATT

3

OFF

VIN2=BATT

3

OFF

LDO6

A

150

TX_EN

VIN2=BATT

3

OFF

VIN2=BATT

3

OFF

LDO7

A

150

SI

VIN2=BATT

3

ON

VIN2=BATT

3

ON

LDO8

D

150

SI

VIN2=BATT

3

OFF

VIN2=BATT

3

OFF

(1)

Voltage is set by the external resistors.

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

6

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