LP3923 datasheet(8/37 Pages) TI1

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LP3923

SNVS567B – APRIL 2010 – REVISED MAY 2013

www.ti.com

General Electrical Characteristics (continued)

Unless otherwise noted, VIN (= VIN1 = VIN2 = VINB = BATT) = 3.6V, GND = 0V, CVIN1–2 = CVINB = 10 µF, CLDOx = 1 µF.

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, TA = TJ = −40°C to +125°C.

(1)

Limit

Symbol

Parameter

Conditions

Typ

Units

Min

Max

IQ(STANDBY)

Standby Supply

VIN = 3.6V, UVLO on, internal logic circuit

µA

Current

on, all other circuits off.

IQ(SLEEP)

Sleep Mode

Buck, LDO1, LDO2, LDO3 and LDO7

Current

enabled

130

400

µA

@ 0 load

POWER MONITOR FUNCTIONS

Battery Under-Voltage Lockout

VUVLO-R

Under Voltage

VIN Rising

3.00

2.85

3.15

Lock-out Rising

VUVLO-F

Under Voltage

VIN Falling (LP3923-VC)

2.80

2.65

2.95

Lock-out Falling

THERMAL SHUTDOWN

Higher Threshold

See(2)

160

°C

LOGIC AND CONTROL INPUTS

VIL

Input Low Level

PS_HOLD, SDA, SCL, RX_EN, TCXO_EN,

0.25*

TX_EN

VLDO3

PWR_ON, HF_PWR, SEL

0.25*

VBATT

VIH

Input High Level

PS_HOLD, SDA, SCL, RX_EN, TCXO_EN,

0.75*

TX_EN

VLDO3

PWR_ON, HF_PWR, SEL

0.75*

VBATT

IIL

Logic Input

All logic inputs except PWR_ON, HF_PWR.

–5

µA

Current

≤ VINPUT ≤ VBATT

RIN

Input Resistance

PWR_ON and HF_PWR Pull-Down

500

Ω

resistance to GND(3)

LOGIC AND CONTROL OUTPUTS

VOL

Output Low Level PON_N, RESET_N, SDA, ACOK_N

0.25*

IOUT = 2 mA

VLDO3

VOH

Output High

PON_N, RESET_N, ACOK_N

0.75*

Level

IOUT = −2 mA

VLDO3

(Not applicable to Open Drain Output SDA)

(2)

Ensured by design.

(3)

Ensured by design.

LDO1, LDO2 (LILO) Electrical Characteristics

Unless otherwise noted, if SEL=GND, then VIN=VIN1=BATT=3.6V, if SEL=BATT, then VIN=VIN1=VBUCK, GND = 0V, CV!N1-2

= 10 µF, CLDOx= 1 µF. Note VINMIN is the greater of 3.0V or VOUT +0.5V. 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, TA = TJ

−40°C to +125°C.

(1)

Limit

Unit

Symbol

Parameter

Conditions

Typical

Min

Max

VOUT

Output Voltage Accuracy

IOUT = 1 mA, VOUT = 3.0V

−2

−3

Default Output Voltage

SEL = GND

3.0

SEL = BATT

1.8

(1)

All limits are specified. All electrical characteristics having room-temperature limits are tested during production with TJ = 25°C. All hot

and cold limits are ensured by correlating the electrical characteristics to process and temperature variations and applying statistical

process control.

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