LP2985AIM5-1.8 datasheet(4/22 Pages) TI

Part #	LP2985AIM5-1.8

Description	LP2985LV-N Micropower 150 mA Low-Noise Low-Dropout Regulator in SOT-23 and DSBGA packages for Applications with Output Voltages 2.0V

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Manufacturer	TI [Texas Instruments]

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LP2985LV-N

SNOS510P – NOVEMBER 1999 – REVISED APRIL 2013

www.ti.com

ELECTRICAL CHARACTERISTICS

(1)

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(2)

LP2985I-X.X(2)

Symbol

Parameter

Conditions

Typ

Units

Min

Max

Min

Max

IL = 1 mA

−1.0

1.0

−1.5

1.5

1 mA

≤ IL ≤ 50 mA

−1.5

1.5

−2.5

2.5

Output Voltage

ΔVO

−2.5

2.5

−3.5

3.5

%VNOM

Tolerance

1 mA

≤ IL ≤ 150 mA

−2.5

2.5

−3.0

3.0

−3.5

3.5

−4.0

4.0

0.007

0.014

Output Voltage

VO(NOM)+1V ≤ VIN ≤ 16V

%/V

0.032

Line Regulation

95

IL = 0

65

125

110

IL = 1 mA

75

170

220

IL = 10 mA

120

400

IGND

Ground Pin Current

µA

500

IL = 50 mA

300

900

1200

IL = 150 mA

825

2000

VON/OFF < 0.3V

0.01

0.8

VON/OFF < 0.15V

0.05

2

Minimum Input Voltage

VIN(min)

Required To maintain Output

2.05

2.20

V

Regulation(3)

150

IL = 50mA

120

250

VIN - VOUT

Dropout Voltage(3)

mV

350

IL = 150mA

280

600

High = O/P ON

1.4

1.6

VON/OFF

ON/OFF Input Voltage(4)

V

Low = O/P OFF

0.55

0.15

VON/OFF = 0

0.01

−2

ION/OFF

ON/OFF Input Current

µA

VON/OFF = 5V

5

15

BW = 300 Hz to 50 kHz,

COUT = 10 µF

en

Output Noise Voltage (RMS)

30

µV

CBYPASS = 10 nF

VOUT = 1.8V

f = 1 kHz, CBYPASS = 10 nF

Ripple Rejection

45

dB

COUT = 10 µF

IO(SC)

Short Circuit Current

RL = 0 (Steady State)

(5)

400

mA

IO(PK)

Peak Output Current

VOUT ≥ Vo(NOM) −5%

350

mA

(1)

Exposing the DSBGA device to direct sunlight will cause misoperation. See APPLICATION HINTS for additional information.

(2)

Limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation using Statistical

Quality Control (SQC) methods. The limits are used to calculate Average Outgoing Quality Level (AOQL).

(3)

VIN must be the greater of 2.2V or VOUT(NOM) + Dropout Voltage to maintain output regulation. Dropout Voltage is defined as the input to

output differential at which the output voltage drops 2% below ther value measured with a 1V differential.

(4)

The ON/OFF input must be properly driven to prevent possible misoperation. For details, refer to APPLICATION HINTS.

(5)

The LP2985LV-N has foldback current limiting which allows a high peak current when VOUT > 0.5V, and then reduces the maximum

output current as VOUT is forced to ground (see TYPICAL PERFORMANCE CHARACTERISTICS curves).

4

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