LP2985-18DBVTG4 datasheet(8/27 Pages) TI

Part #	LP2985-18DBVTG4

Description	150-mA LOW-NOISE LOW-DROPOUT REGULATOR WITH SHUTDOWN

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Manufacturer	TI [Texas Instruments]

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−100

100

300

500

700

Time − ms

VI = 16 V

VO = 3.3 V

Ci = 1 µF

Cbyp = 0.01 µF

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5

200

220

240

260

280

300

320

0

0.5

1

1.5

2

2.5

3

3.5

Output Voltage − V

VO = 3.3 V

0

100

200

300

400

500

600

700

800

900

1000

1100

1200

0

20

40

60

80

100

120

140

Load Current − mA

160

VO = 3.3 V

Cbyp = 10 nF

0

10

20

30

40

50

60

70

80

90

100

10

100

1k

10k

100k

1M

Frequency − Hz

VI = 5 V

VO = 3.3 V

Co = 10 µF

Cbyp = 0 nF

50 mA

150 mA

1 mA

LP2985

SLVS522M – JULY 2004 – REVISED MARCH 2009 .......................................................................................................................................................... www.ti.com

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

CIN = 1 µF, COUT = 4.7 µF, VIN = VOUT(NOM) + 1 V, TA = 25°C, ON/OFF pin tied to VIN (unless otherwise specified)

SHORT-CIRCUIT CURRENT

vs

TIME

OUTPUT VOLTAGE

Figure 5.

Figure 6.

GROUND-PIN CURRENT

RIPPLE REJECTION

vs

LOAD CURRENT

FREQUENCY

Figure 7.

Figure 8.

8

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LP2985-18DBVTG4 Datasheet(PDF) 8 Page - Texas Instruments

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