LP2985-18DBVRE4 datasheet(10/27 Pages) TI

Part #	LP2985-18DBVRE4

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

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Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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10 / 27 page

0.01

0.1

1

10

100

1k

10k

100k

Frequency − Hz

Cbyp = 1 nF

Cbyp = 10 nF

Cbyp = 100 pF

ILOAD = 150 mA

0.001

0.01

0.1

1

10

100

1k

10k

100k

1M

Frequency − Hz

Ci = 1 µF

Co = 4.7 µF

VO = 3.3 V

10 mA

100 mA

1 mA

0.01

0.1

1

10

100

1k

10k

100k

Frequency − Hz

ILOAD = 1 mA

Cbyp = 1 nF

Cbyp = 10 nF

Cbyp = 100 pF

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

0

1

2

3

4

5

6

Input Voltage − V

RL = Open

RL = 3.3 kΩ

VO = 3.3 V

Cbyp = 10 nF

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)

OUTPUT IMPEDANCE

OUTPUT NOISE DENSITY

vs

FREQUENCY

Figure 13.

Figure 14.

OUTPUT NOISE DENSITY

INPUT CURRENT

vs

FREQUENCY

INPUT VOLTAGE

Figure 15.

Figure 16.

10

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