LP3971 datasheet(7/57 Pages) TI1

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LP3971

www.ti.com

SNVS432U – JANUARY 2006 – REVISED OCTOBER 2008

General Electrical Characteristics

Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over the

entire junction temperature range for operation,

−40°C to +125°C.

(1) (2)

Symbol

Parameter

Conditio

Min

Typ

Max

Units

VIN, VDDA, VIN Buck1, 2 and 3

Battery Voltage

2.7

3.6

5.5

VINLDO4, VINLDO5

Power Supply for LDO 4 and 5

1.74

3.6

5.5

TSD

Thermal Shutdown (3)

Tempera

160

ture

°C

Hysteresi

(1)

All voltages are with respect to the potential at the GND pin.

(2)

All limits guaranteed at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits

are production tested, guaranteed through statistical analysis or guaranteed by design. All limits at temperature extremes are

guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing

Quality Level (AOQL).

(3)

This electrical specification is guaranteed by design.

Supply Specification

(1) (2)

IMAX

VOUT (Volts)

Maximum Output

Supply

Range (V)

Resolution (mV)

Current (mA) (3)

LDO_RTC

Tracking (4)

N/A

30 or 10

LDO1

1.8 to 3.3

100

300

LDO2

1.8 to 3.3

100

150

LDO3

1.8 to 3.3

100

150

LDO4

1.0 to 3.3

50-600

150

LDO5

1.0 to 3.3

50-600

370

BUCK 1

0.8 to 3.3

50-600

1600

BUCK 2

0.8 to 3.3

50-600

1600

BUCK 3

0.8 to 3.3

50-600

1600

(1)

All voltages are with respect to the potential at the GND pin.

(2)

All limits guaranteed at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits

are production tested, guaranteed through statistical analysis or guaranteed by design. All limits at temperature extremes are

guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing

Quality Level (AOQL).

(3)

This electrical specification is guaranteed by design.

(4)

LDO_RTC voltage can track LDO1 voltage. LP3971 has a tracking function (nIO_TRACK). When enabled, LDO_RTC voltage will track

LDO1 voltage within 200mV down to 2.8V when LDO1 is enabled

Default Voltage Options

Version

LP3971SQ-B410

LP3971SQ-D510

LP3971Q-F211

LP3971SQ-W416

Enable

Version B

Version C

Version A

Version SW

LDO_RTC

2.8

3.0 (w/

3.3 (w/

LDO1

SYS_EN

Trkg)

SYS_EN

Trkg)

SYS_EN

3.3

SYS_EN

3.0

LDO2

SYS_EN

3.0

SYS_EN

3.3

SYS_EN

3.3

SYS_EN

3.3

LDO3

SYS_EN

3.0

SYS_EN

3.3

SYS_EN

3.3

PWR_EN

2.5

LDO4

PWR_EN

1.3

PWR_EN

1.3

SYS_EN

1.8

SYS_EN

1.0

LDO5

PWR_EN

1.1

PWR_EN

1.1

PWR_EN

3.3

PWR_EN

1.0

BUCK1

PWR_EN

1.4

PWR_EN

1.4

PWR_EN

1.5

PWR_EN

1.2

BUCK2

SYS_EN

3.0

SYS_EN

3.3

SYS_EN

2.5

SYS_EN

3.0

BUCK3

SYS_EN

1.8

SYS_EN

1.8

SYS_EN

1.8

SYS_EN

1.8

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