LP3872 datasheet(6/28 Pages) TI1

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TEMPERATURE (

oC)

-40

-20

100 125

0.001

0.01

0.1

JUNCTION TEMPERATURE (

oC)

-40 -20

80 100 125

1.8

2.3

2.8

3.3

3.8

4.3

5.0

OUTPUT VOLTAGE (V)

0.5

1.5

100

200

300

400

500

600

OUTPUT LOAD CURRENT (A)

-40

o C

LP3872, LP3875

SNVS227H – FEBRUARY 2003 – REVISED JANUARY 2015

www.ti.com

Electrical Characteristics (continued)

Unless otherwise specified: TJ = 25°C, VIN = VO(NOM) + 1 V, IL = 10 mA, COUT = 10 µF, VSD = 2 V.

PARAMETER

TEST CONDITIONS

MIN(1)

TYP(2)

MAX(1)

UNIT

AC PARAMETERS

VIN = VOUT + 1 V, COUT = 10 µF

VOUT = 3.3 V, f = 120 Hz

PSRR

Ripple rejection

VIN = VOUT + 0.5 V, COUT = 10 µF

VOUT = 3.3 V, f = 120 Hz

ρn(l/f)

Output noise density

f = 120 Hz

0.8

µV

BW = 10 Hz – 100 kHz, VOUT = 2.5 V

150

µV

Output noise voltage

(rms)

BW = 300 Hz – 300 kH, VOUT = 2.5 V

100

6.6 Typical Characteristics

Unless otherwise specified: TJ = 25°C, COUT = 10 µF, CIN = 10 µF, SD pin is tied to VIN, VOUT = 2.5 V, VIN = VO(NOM) + 1 V, IL =

10 mA

Figure 1. Dropout Voltage vs Output Load Current

Figure 2. Ground Current vs Output Voltage

IL = 1.5 A

Figure 4. Errorflag Threshold vs Junction Temperature

Figure 3. Shutdown IQ vs Junction Temperature

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