LP3918

SNVS476D – AUGUST 2007 – REVISED MAY 2013

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LDO1 (CORE) Electrical Characteristics

Unless otherwise noted, VIN ( = VIN1 = VIN2 = BATT) = 3.6V, GND = 0V, CVIN1-2=10µF, CLDOX=1µF. VOUT1 set to 3.0V output.

Note VINMIN is the greater of 3.0V or VOUT1+ 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

VOUT1

Output Voltage Accuracy

IOUT1 = 1mA, VOUT1= 3.0V

−2

+2

%

−3

+3

Output Voltage

Default

1.8

V

IOUT1

Output Current

VINMIN ≤ VIN ≤ 5.5V

300

mA

Output Current Limit

VOUT1 = 0V

600

VDO1

Dropout Voltage

IOUT1 = 300mA,

(2)

200

280

mV

ΔVOUT1

Line Regulation

VINMIN ≤ VIN ≤ 5.5V

2

mV

IOUT1 = 1mA

Load Regulation

1mA

≤ IOUT1 ≤ 300mA

20

mV

en1

Output Noise Voltage

10Hz

≤ f≤ 100KHz,

45

µVRMS

COUT = 1µF

(3)

PSRR

Power Supply Rejection

F = 10kHz, COUT = 1µF

65

dB

Ratio

IOUT1 = 20mA

(3)

tSTART-UP

Start-Up Time from Shut-

COUT = 1µF, IOUT1 = 300mA

60

170

µs

down

(3)

TTransient

Start-Up Transient

COUT = 1µF, IOUT1 = 300mA

60

120

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 production tested.

LDO2 (DIGI) Electrical Characteristics

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

VOUT2

Output Voltage Accuracy

IOUT2 = 1mA, VOUT2= 3.0V

−2

+2

%

−3

+3

Output Voltage

Default

3.0

V

IOUT2

Output Current

VINMIN ≤ VIN ≤ 5.5V

300

mA

Output Current Limit

VOUT2 = 0V

600

VDO2

Dropout Voltage

IOUT2 = 300mA

(2)

200

280

mV

ΔVOUT2

Line Regulation

VINMIN ≤ VIN ≤ 5.5V

2

mV

IOUT2 = 1mA

Load Regulation

1mA

≤ IOUT2 ≤ 300mA

20

mV

(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.

8

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