LP3972 datasheet(7/59 Pages) TI1

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LP3972

www.ti.com

SNVS468J – SEPTEMBER 2006 – REVISED AUGUST 2011

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) (3)

Symbol

Parameter

Test Conditions

Min

Typ

Max

Unit

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

VIN

TSD

Thermal Shutdown (4)

Temperature

160

°C

Hysteresis

(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)

No input supply should be higher then VDDA

(4)

This electrical specification is guaranteed by design.

Supply Specifications

(1) (2)

VOUT (Volts)

IMAX

Maximum Current

Supply

Range

Resolution

Current (mA)

(V)

(mV)

LDO_RTC

2.8V

N/A

30 mA dc source 10 mA backup source

LDO1 (VCC_MVT)

1.7 to 2.0

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 (VCC_SRAM)

0.850 to 1.5

400

BUCK1 (VCC_APPS)

0.725 to 1.5

1600

BUCK2

0.8 to 3.3

50-600

1600

BUCK3

0.8 to 3.3

50-600

1600

(1)

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

(2)

The Human body model is a 100 pF capacitor discharged through a 1.5 k

Ω resistor into each pin. (MIL-STD-883 3015.7) The machine

model is a 200 pF capacitor discharged directly into each pin. (EAIJ).

Default Voltage Option

(1) (2) (3)

Version

LP3972SQ-A514

LP3972SQ-A413

Enable

Version A

LDO_RTC

—

2.8

—

2.8

LDO1

SYS_EN

1.8

SYS_EN

1.8

LDO2

SYS_EN

1.8D

SYS_EN

1.8D

LDO3

SYS_EN

LDO4

SYS_EN

2.8D

LDO5

PWR_EN

1.4

PWR_EN

1.4

BUCK1

PWR_EN

1.4

PWR_EN

1.4

BUCK2

SYS_EN

3.3

SYS_EN

BUCK3

SYS_EN

1.8

SYS_EN

1.8

Version

LP3972SQ-E514

LP3972SQ-I514

Enable

Version E

Version I

LDO_RTC

—

2.8

—

2.8

(1)

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

(2)

The Human body model is a 100 pF capacitor discharged through a 1.5 k

Ω resistor into each pin. (MIL-STD-883 3015.7) The machine

model is a 200 pF capacitor discharged directly into each pin. (EAIJ).

(3)

E = Regulator is ENABLED during startup. D = Regulator is DISABLED during startup.

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