NSC LP2981IM5X-3.3, LP2981IM5X-3.0, LP2981IM5X-2.5, LP2981IM5-5.0, LP2981AIM5X-5.0 Datasheet

LP2981
Micropower 100 mA Ultra Low-Dropout Regulator

General Description

The LP2981 is a 100 mA, fixed-output voltage regulator de­signed specifically to meet the requirements of
battery-powered applications.

Using an optimized VIP

™

(Vertically Integrated PNP) pro­cess, the LP2981 delivers unequaled performance in all
specifications critical to battery-powered designs:

Dropout Voltage. Typically 200 mV

@

100 mA load, and

7mV

@

1 mA load.

Ground Pin Current. Typically 600 µA

@

100 mA load, and

80 µA

@

1 mA load.

Sleep Mode. Less than 1 µA quiescent current when ON/
OFF pin is pulled low.

Smallest Possible Size. SOT-23and micro SMD packages
use an absolute minimum board space.

Precision Output. 0.75% tolerance output voltages avail­able (A grade).

Eleven voltage options, from 2.5V to 5.0V, are available as
standard products.

Features

n Ultra low dropout voltage
n Output voltage accuracy 0.75% (A Grade)
n Guaranteed 100 mA output current
n Smallest possible size (SOT-23, micro SMD package)

n

<

1 µA quiescent current when shutdown

n Low ground pin current at all load currents
n High peak current capability (300 mA typical)
n Wide supply voltage range (16V max)
n Fast dynamic response to line and load
n Low Z

OUT

over wide frequency range

n Overtemperature/overcurrent protection
n −40˚C to +125˚C junction temperature range

Applications

n Cellular Phone
n Palmtop/Laptop Computer
n Personal Digital Assistant (PDA)
n Camcorder, Personal Stereo, Camera

Block Diagram

VIP™is a trademark of National Semiconductor Corporation.

DS012506-1

March 2000

LP2981 Micropower 100 mA Ultra Low-Dropout Regulator

© 2000 National Semiconductor Corporation DS012506 www.national.com

Connection Diagrams

Ordering Information

TABLE 1. Package Marking and Order Information

Output Voltage

(V)

Grade Order Information Package

Marking

Supplied as:

5-Lead Small Outline Package (M5)

2.5 A LP2981AIM5X-2.5 L0CA 3000 Units on Tape and Reel

2.5 A LP2981AIM5-2.5 L0CA 1000 Units on Tape and Reel

2.5 STD LP2981IM5X-2.5 L0CB 3000 Units on Tape and Reel

2.5 STD LP2981IM5-2.5 L0CB 1000 Units on Tape and Reel

2.7 A LP2981AIM5X-2.7 L0DA 3000 Units on Tape and Reel

2.7 A LP2981AIM5-2.7 L0DA 1000 Units on Tape and Reel

2.7 STD LP2981IM5X-2.7 L0DB 3000 Units on Tape and Reel

2.7 STD LP2981IM5-2.7 L0DB 1000 Units on Tape and Reel

2.8 A LP2981AIM5X-2.8 L77A 3000 Units on Tape and Reel

2.8 A LP2981AIM5-2.8 L77A 1000 Units on Tape and Reel

2.8 STD LP2981IM5X-2.8 L77B 3000 Units on Tape and Reel

2.8 STD LP2981IM5-2.8 L77B 1000 Units on Tape and Reel

2.9 A LP2981AIM5X-2.9 L0VA 3000 Units on Tape and Reel

2.9 A LP2981AIM5-2.9 L0VA 1000 Units on Tape and Reel

2.9 STD LP2981IM5X-2.9 L0VB 3000 Units on Tape and Reel

2.9 STD LP2981IM5-2.9 L0VB 1000 Units on Tape and Reel

3.0 A LP2981AIM5X-3.0 L05A 3000 Units on Tape and Reel

3.0 A LP2981AIM5-3.0 L05A 1000 Units on Tape and Reel

3.0 STD LP2981IM5X-3.0 L05B 3000 Units on Tape and Reel

3.0 STD LP2981IM5-3.0 L05B 1000 Units on Tape and Reel

3.1 A LP2981AIM5X-3.1 L38A 3000 Units on Tape and Reel

3.1 A LP2981AIM5-3.1 L38A 1000 Units on Tape and Reel

3.1 STD LP2981IM5X-3.1 L38B 3000 Units on Tape and Reel

3.1 STD LP2981IM5-3.1 L38B 1000 Units on Tape and Reel

3.2 A LP2981AIM5X-3.2 L35A 3000 Units on Tape and Reel

3.2 A LP2981AIM5-3.2 L35A 1000 Units on Tape and Reel

3.2 STD LP2981IM5X-3.2 L35B 3000 Units on Tape and Reel

3.2 STD LP2981IM5-3.2 L35B 1000 Units on Tape and Reel

3.3 A LP2981AIM5X-3.3 L04A 3000 Units on Tape and Reel

3.3 A LP2981AIM5-3.3 L04A 1000 Units on Tape and Reel

3.3 STD LP2981IM5X-3.3 L04B 3000 Units on Tape and Reel

3.3 STD LP2981IM5-3.3 L04B 1000 Units on Tape and Reel

5-Lead Small Outline Package (M5)

DS012506-2

Top View

See NS Package Number MF05A

For ordering information see

Table 1

micro SMD, 5 Bump Package (BPA05)

DS012506-50

Bottom View

See NS Package Number BPA05

LP2981

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Ordering Information (Continued)

TABLE 1. Package Marking and Order Information (Continued)

Output Voltage

(V)

Grade Order Information Package

Marking

Supplied as:

5-Lead Small Outline Package (M5)

3.6 A LP2981AIM5X-3.6 L0JA 3000 Units on Tape and Reel

3.6 A LP2981AIM5-3.6 L0JA 1000 Units on Tape and Reel

3.6 STD LP2981IM5X-3.6 L0JB 3000 Units on Tape and Reel

3.6 STD LP2981IM5-3.6 L0JB 1000 Units on Tape and Reel

3.8 A LP2981AIM5X-3.8 L36A 3000 Units on Tape and Reel

3.8 A LP2981AIM5-3.8 L36A 1000 Units on Tape and Reel

3.8 STD LP2981IM5X-3.8 L36B 3000 Units on Tape and Reel

3.8 STD LP2981IM5-3.8 L36B 1000 Units on Tape and Reel

4.0 A LP2981AIM5X-4.0 L0ZA 3000 Units on Tape and Reel

4.0 A LP2981AIM5-4.0 L0ZA 1000 Units on Tape and Reel

4.0 STD LP2981IM5X-4.0 L0ZB 3000 Units on Tape and Reel

4.0 STD LP2981IM5-4.0 L0ZB 1000 Units on Tape and Reel

4.7 A LP2981AIM5X-4.7 L0GA 3000 Units on Tape and Reel

4.7 A LP2981AIM5-4.7 L0GA 1000 Units on Tape and Reel

4.7 STD LP2981IM5X-4.7 L0GB 3000 Units on Tape and Reel

4.7 STD LP2981IM5-4.7 L0GB 1000 Units on Tape and Reel

5.0 A LP2981AIM5X-5.0 L03A 3000 Units on Tape and Reel

5.0 A LP2981AIM5-5.0 L03A 1000 Units on Tape and Reel

5.0 STD LP2981IM5X-5.0 L03B 3000 Units on Tape and Reel

5.0 STD LP2981IM5-5.0 L03B 1000 Units on Tape and Reel

micro SMD, 5 Bump Package (BPA05)

2.5 A LP2981AIBP-2.5 250 Units on Tape and Reel

2.5 A LP2981AIBPX-2.5 3000 Units on Tape and Reel

2.5 STD LP2981IBP-2.5 250 Units on Tape and Reel

2.5 STD LP2981IBPX-2.5 3000 Units on Tape and Reel

3.2 A LP2981AIBP-3.2 250 Units on Tape and Reel

3.2 A LP2981AIBPX-3.2 3000 Units on Tape and Reel

3.2 STD LP2981IBP-3.2 250 Units on Tape and Reel

3.2 STD LP2981IBPX-3.2 3000 Units on Tape and Reel

3.3 A LP2981AIBP-3.3 250 Units on Tape and Reel

3.3 A LP2981AIBPX-3.3 3000 Units on Tape and Reel

3.3 STD LP2981IBP-3.3 250 Units on Tape and Reel

3.3 STD LP2981IBPX-3.3 3000 Units on Tape and Reel

LP2981

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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 −65˚C to +150˚C
Operating Junction Temperature

Range −40˚C to +125˚C

Lead Temperature

(Soldering, 5 sec.) 260˚C

ESD Rating (Note 2) 2 kV

Power Dissipation (Note 3) Internally Limited
Input Supply Voltage (Survival) −0.3V to +16V
Input Supply Voltage (Operating) 2.1V to +16V
Shutdown Input Voltage (Survival) −0.3V to +16V
Output Voltage (Survival, (Note 4)) −0.3V to +9V
I

OUT

(Survival) Short Circuit Protected

Input-Output Voltage

(Survival, (Note 5)) −0.3V to +16V

Electrical Characteristics

Limits in standard typeface are for TJ= 25˚C, and limits in boldface type applyover the full operating temperature range. Un­less otherwise specified: V

IN=VO(NOM)

+ 1V, CIN= 1 µF, IL= 1 mA, C

OUT

= 4.7 µF,V

ON/OFF

= 2V.

Symbol Parameter Conditions Typ LP2981AI-XX LP2981I-XX Units

(Note 6) (Note 6)

Min Max Min Max

∆V

O

Output Voltage
Tolerance

IL= 1mA −0.75 0.75 −1.25 1.25

%V

NOM

1mA<I

L

<

100 mA −1.0 1.0 −2.0 2.0

−2.5 2.5 −3.5 3.5

Output Voltage V

O(NOM)

+ 1V 0.007 0.014 0.014 %/V

Line Regulation ≤ V

IN

≤ 16V 0.032 0.032

V

IN–VO

Dropout Voltage IL=0 133mV
(Note 7) 55

I

L

= 1 mA 7 10 10

15 15

I

L

= 25 mA 70 100 100

150 150

I

L

= 100 mA 200 250 250

375 375

I

GND

Ground Pin Current IL= 0 65 95 95 µA

125 125

I

L

= 1 mA 80 110 110

170 170

I

L

= 25 mA 200 300 300

550 550

I

L

= 100 mA 600 800 800

1500 1500

V

ON/OFF

<

0.3V 0.01 0.8 0.8

V

ON/OFF

<

0.15V 0.05 2 2

V

ON/OFF

ON/OFF Input Voltage High = O/P ON 1.4 1.6 1.6 V
(Note 8) Low = O/P OFF 0.50 0.15 0.15

I

ON/OFF

ON/OFF Input Current V

ON/OFF

= 0 0.01 −1 −1 µA

V

ON/OFF

=5V 5 15 15

I

O(PK)

Peak Output Current V

OUT

≥ V

O(NOM)

− 5% 400 150 150 mA

e

n

Output Noise BW = 300 Hz–50 kHz, 160 µV
Voltage (RMS) C

OUT

=10µF

Ripple Rejection f = 1 kHz 63 dB

C

OUT

=10µF

I

O(MAX)

Short Circuit Current RL= 0 (Steady State) 150 mA

(Note 9)

LP2981

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Electrical Characteristics (Continued)

Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the de-

vice outside of its rated operating conditions.

Note 2: The ESD rating of pins 3 and 4 is 1 kV.
Note 3: The maximum allowable power dissipation is a function of the maximum junction temperature, T

J(MAX)

, the junction-to-ambient thermal resistance, θJA, and

the ambient temperature, T

A

. The maximum allowable power dissipation at any ambient temperature is calculated using:

The value of θJAfor the SOT-23 package is 220˚C/W and the micro SMD package is 320˚C/W. Exceeding the maximum allowable power dissipation will cause ex­cessive die temperature, and the regulator will go into thermal shutdown.

Note 4: If used in a dual-supply system where the regulator load is returned to a negative supply, the LP2981 output must be diode-clamped to ground.
Note 5: The output PNP structure contains a diode between the V

IN

and V

OUT

terminals that is normally reverse-biased. Reversing the polarity from VINto V

OUT

will turn on this diode (see Application Hints).
Note 6: Limits are 100% production tested at 25˚C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control

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

Note 7: Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below the value measured with a 1V differential.
Note 8: The ON/OFF inputs must be properly driven to prevent misoperation. For details, refer to Application Hints.
Note 9: See Typical Performance Characteristics curves.

Basic Application Circuit

DS012506-4

*

ON/OFF input must be actively terminated. Tie to VINif this function is not to be used.

**

Minimum Output Capacitance is shown to insure stability over full load current range. More capacitance provides superior dynamic performance and

additional stability margin (see Application Hints).

***

Do not make connections to this pin.

LP2981

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