LP3918

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SNVS476D – AUGUST 2007 – REVISED MAY 2013

LDO2 (DIGI) Electrical Characteristics (continued)

Unless otherwise noted, VIN ( = VIN1 = VIN2 = BATT) = 3.6V, GND = 0V, CVIN1-2=10µF, CLDOX=1µF. Note VINMIN is the greater

of 3.0V or VOUT2+ 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

Symbol

Parameter

Condition

Typ

Units

Min

Max

en2

Output Noise Voltage

10Hz

≤ f≤ 100KHz,

45

µVRMS

COUT = 1µF

(3)

PSRR

Power Supply Rejection

F = 10kHz, COUT = 1µF

65

dB

Ratio

IOUT2 = 20mA

(3)

tSTART-UP

Start-Up Time from Shut-

COUT = 1µF, IOUT2 = 300mA

40

60

µs

down

(3)

tTransient

Start-Up Transient

COUT = 1µF, IOUT2 = 300mA

5

30

mV

Overshoot

(3)

(3)

Specified by design. Not production tested.

LDO3 (ANA), LDO4 (TCXO) Electrical Characteristics

Unless otherwise noted, VIN ( = VIN1 = VIN2 = BATT) = 3.6V, GND = 0V, CVIN1-2=10µF, CLDOX=1µF. TCXO_EN high. Note

VINMIN is the greater of 3.0V or VOUT3/4 + 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

Symbol

Parameter

Condition

Typ

Units

Min

Max

VOUT3, VOUT4

Output Voltage Accuracy

IOUT3/4 = 1mA, VOUT3/4= 3.0V

−2

+2

%

−3

+3

Output Voltage

LDO3 default

3.0

V

LDO4 default

3.0

IOUT3, IOUT4

Output Current

VINMIN ≤ VIN ≤ 5.5V

80

mA

Output Current Limit

VOUT3/4 = 0V

160

VDO3, VDO4

Dropout Voltage

IOUT3/4 = 80mA

(2)

180

220

mV

ΔVOUT3 , ΔVOUT4

Line Regulation

VINMIN ≤ VIN ≤ 5.5V

2

mV

IOUT3/4 = 1mA

Load Regulation

1mA

≤ IOUT3/4 ≤ 80mA

20

mV

en3,en4

Output Noise Voltage

10Hz

≤ f ≤ 100kHz,

45

µVRMS

COUT = 1µF

(3)

PSRR

Power Supply Rejection

F = 10kHz, COUT = 1µF

65

dB

Ratio

IOUT3/4 = 20mA

(3)

tSTART-UP

Start-Up Time from Shut-

COUT = 1µF, IOUT3/4 = 80mA

40

60

µs

down

(3)

tTransient

Start-Up Transient

COUT = 1µF, IOUT3/4 = 80mA

5

30

mV

Overshoot

(3)

(1)

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

specified by correlating the electrical characteristics to process and temperature variations and applying statistical process control.

(2)

Dropout voltage is the input-to-output voltage difference at which the output voltage is 100mV below its nominal value. This specification

does not apply in cases it implies operation with an input voltage below the 3.0V minimum appearing under Operating Ratings. For

example, this specification does not apply for devices having 1.5V outputs because the specification would imply operation with an input

voltage at or about 1.5V.

(3)

Specified by design. Not productino tested.

LDO5 (RX), LDO6 (TX), LDO7 (GP) Electrical Characteristics

Unless otherwise noted, VIN ( = VIN1 = VIN2 = BATT) = 3.6V, GND = 0V, CVIN1-2=10µF, CLDOX=1µF. RX_EN, TX_EN high.

LDO7 Enabled via Serial Interface. Note VINMIN is the greater of 3.0V or VOUT5/6/7 + 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

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