LP3972 datasheet(11/59 Pages) NSC

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LDO1to5

Unless otherwise noted, V

IN = 3.6V, CIN = 1.0 µF, COUT = 0.47 µF, COUT (VRTC) = 1.0 µF ceramic. Typical values and limits

appearing in normal type apply for T

J = 25˚C. Limits appearing in boldface type apply over the entire junction temperature

range for operation, −40˚C to +125˚C. (Notes 2, 6, 7, 10, 11, 15) and (Note 16).

Symbol

Parameter

Conditions

Min

Typ

Max

Units

OUT

Accuracy

Output Voltage Accuracy (Default

OUT)

Load Current=1mA

−3

∆V

OUT

Line Regulation

IN =3.1V to 5.0V, (Note 11) Load

Current=1mA

0.15

%/V

Load Regulation

IN = 3.6V,

Load Current=1mAtoI

MAX

0.011

%/mA

Short Circuit Current Limit

LDO1–4, V

OUT = 0V

400

LDO5, V

OUT = 0V

500

IN -

OUT

Dropout Voltage

Load Current = 50 mA (Note 7)

150

PSRR

Power Supply Ripple Rejection

f = 10 kHz, Load Current = I

MAX

Quiescent Current “On”

OUT =0mA

µA

Quiescent Current “On”

OUT =IMAX

Quiescent Current “Off”

EN is de-asserted

0.03

Turn On Time

Start up from Shut-down

300

µsec

OUT

Output Capacitor

Capacitance for Stability

0˚C

≤ T

≤ 125˚C

0.33

0.47

µF

−40˚C

≤ T

≤ 125˚C

0.68

1.0

ESR

500

Ω

LDO dropout voltage vs. Load Current collect data for all LDO’s

Dropout Voltage vs. Load Current

Change in Output Voltage vs. Load Current

20207629

20207630

LP3972 Datasheet(PDF) 11 Page - National Semiconductor (TI)

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