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LP2985LV

September 9, 2010

Micropower 150 mA Low-Noise Low-Dropout Regulator in

SOT-23 and micro SMD packages for Applications with

Output Voltages ≤ 2.0V

Designed for Use with Very Low ESR Output Capacitors

General Description

The LP2985LV is a 150 mA, fixed-output voltage regulator

designed to providehigh performance and low noise in appli-

cations requiring output voltages ≤ 2.0V.

Using an optimized VIP® (Vertically Integrated PNP) process,

the LP2985LV delivers unequalled performance in all speci-

fications critical to battery-powered designs:

Ground Pin Current: Typically 825 µA @ 150 mA load, and

75 µA @ 1 mA load.

Enhanced Stability: The LP2985LV is stable with output ca-

pacitor ESR as low as 5 mΩ, which allows the use of ceramic

capacitors on the output.

Sleep Mode: Less than 1 µA quiescent current when ON/OFF

pin is pulled low.

Smallest Possible Size: micro SMD package uses absolute

minimum board space.

Precision Output: 1% tolerance output voltages available (A

grade).

Low Noise: By adding a 10 nF bypass capacitor, output noise

can be reduced to 30 µV (typical).

Features

■ Guaranteed 150 mA output current

■ Smallest possible size (micro SMD)

■ Requires minimum external components

■ Stable with low-ESR output capacitor

■ <1 µA quiescent current when shut down

■ Low ground pin current at all loads

■ Output voltage accuracy 1% (A Grade)

■ High peak current capability

■ Wide supply voltage range (16V max)

■ Low ZOUT: 0.3Ω typical (10 Hz to 1 MHz)

■ Overtemperature/overcurrent protection

■ −40°C to +125°C junction temperature range

■ Custom voltages available

Applications

■ Cellular Phone

■ Palmtop/Laptop Computer

■ Personal Digital Assistant (PDA)

■ Camcorder, Personal Stereo, Camera

Block Diagram

VIP® is a registered trademark of National Semiconductor Corporation.

© 2010 National Semiconductor Corporation 101295

10129501

www.national.com

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Storage Temperature Range

Operating Junction Temperature

Range

Lead Temp. (Soldering, 5 sec.)

ESD Rating (Note 2)

−65°C to +150°C

−40°C to +125°C

260°C

2 kV

Power Dissipation (Note 3)

Input Supply Voltage (Survival)

Input Supply Voltage (Operating)

Shutdown Input Voltage (Survival)

Output Voltage (Survival, (Note 4))

IOUT (Survival)

Input-Output Voltage (Survival,

 (Note 5))

Internally Limited

−0.3V to +16V

2.2V to +16V

−0.3V to +16V

−0.3V to +9V

Short Circuit

Protected

−0.3V to +16V

Electrical Characteristics (Note 10)

Limits in standard typeface are for TJ = 25°C. and limits in boldface type apply over the full operating temperature range. Unless

otherwise specified: VIN = VO(NOM) + 1V, IL = 1 mA, CIN = 1 µF, COUT = 4.7 µF, VON/OFF = 2V.

LP2985AI-X.X

LP2985I-X.X

Symbol

Parameter

Conditions

Typ (Note 6)

(Note 6)

Units

Min Max Min Max

ΔVO Output Voltage IL = 1 mA

Tolerance

1 mA ≤ IL ≤ 50 mA

1 mA ≤ IL ≤ 150 mA

−1.0 1.0 −1.5 1.5

−1.5 1.5 −2.5 2.5

−2.5 2.5 −3.5 3.5 %VNOM

−2.5 2.5 −3.0 3.0

−3.5 3.5 −4.0 4.0

Output Voltage

Line Regulation

VO(NOM)+1V ≤ VIN ≤ 16V

0.007

0.014

0.032

0.014

0.032

%/V

IGND

VIN(min)

VIN - VOUT

VON/OFF

ION/OFF

en

Ground Pin Current

IL = 0

IL = 1 mA

IL = 10 mA

IL = 50 mA

IL = 150 mA

Minimum Input Voltage

Required To maintain

Output Regulation

(Note 9)

Dropout Voltage

(Note 9)

VON/OFF < 0.3V

VON/OFF < 0.15V

IL = 50mA

IL = 150mA

ON/OFF Input Voltage

(Note 7)

ON/OFF Input Current

Output Noise

Voltage (RMS)

High = O/P ON

Low = O/P OFF

VON/OFF = 0

VON/OFF = 5V

BW = 300 Hz to 50 kHz,

COUT = 10 µF

CBYPASS = 10 nF

VOUT = 1.8V

65

75

120

300

825

0.01

0.05

2.05

95

125

110

170

220

400

500

900

1200

2000

0.8

2

2.20

95

125

110

170

220

400

500

900

1200

2000

0.8

2

2.20

µA

V

120 150

150

250

280 350

600

250

mV

350

600

1.4 1.6

1.6

0.55 0.15 0.15

V

0.01 −2

5 15

−2

µA

15

30 µV

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4

Output Impedance vs Frequency

Output Impedance vs Frequency

10129527

Noise Density

10129532

Noise Density

10129533

Ground Pin vs Load Current

10129537

Minimum Input Voltage vs Temperature

10129513

7

10129509

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