NSC LP2982AIM5-2.5, LP2982AIBPX-2.8, LP2982AIBP-3.0, LP2982AIBP-2.8, LP2982IM5X-5.0 Datasheet

LP2982
Micropower 50 mA Ultra Low-Dropout Regulator

LP2982 Micropower 50 mA Ultra Low-Dropout Regulator

March 2000

General Description

The LP2982 is a 50 mA, fixed-output voltage regulator de­signed to provide ultra low dropout and lower noise in battery
powered applications.

Using an optimized VIP
cess, the LP2982 delivers unequaled performance in all
specifications critical to battery-powered designs:

Dropout Voltage: Typically120 mV

@

1 mA load.

Ground Pin Current: Typically 375 µA

@

80 µA
Sleep Mode: Less than 1 µA quiescent current when on/off

pin is pulled low.
Smallest Possible Size: SOT-23and micro SMD packages

use absolute minimum board space.
Precision Output: 1.0% tolerance output voltages available

(A grade).
Low Noise: By adding an external bypass capacitor, output

noise can be reduced to 30 µV (typical).
Ten output voltage versions, from 2.5V to 5.0V, are available

as standard products.

1 mA load.

™

(Vertically Integrated PNP) pro-

@

50 mA load, and 7 mV

@

50 mA load, and

Block Diagram

Features

n Ultra low dropout voltage
n Guaranteed 50 mA output current
n Typical dropout voltage 180 mV
n Smallest possible size (SOT-23, micro SMD package)
n Requires minimum external components

<

n

1 µA quiescent current when shutdown

n Low ground pin current at all loads
n Output voltage accuracy 1.0% (A Grade)
n High peak current capability (150 mA typical)
n Wide supply voltage range (16V max)
n Low Z
n Overtemperature/overcurrent protection
n −40˚C to +125˚C junction temperature range
n Custom voltages available

0.3Ω typical (10 Hz to 1 MHz)

OUT

@

80 mA

Applications

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

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VIP™is a trademark of National Semiconductor Corporation.

© 2000 National Semiconductor Corporation DS012679 www.national.com

Connection Diagrams

LP2982

5-Lead Small Outline Package (M5)

micro SMD, 5 Bump Package (BPA05)

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Top View

See NS Package Number MF05A

For ordering information see

Basic Application Circuit

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Bottom View

See NS Package Number BPA05

Table 1

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*

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

**

Minimum capacitance is shown to insure stability over full load current range. More capacitance provides superior dynamic performance (see Application

Hints).

***

See Application Hints.

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Ordering Information

LP2982

TABLE 1. Package Marking and Ordering Information

Output Voltage

(V) Grade Order Information

5-Lead Small Outline Package (M5)

2.5 A LP2982AIM5X-2.5 L58A 3000 Units on Tape and Reel

2.5 A LP2982AIM5-2.5 L58A 1000 Units on Tape and Reel

2.5 STD LP2982IM5X-2.5 L58B 3000 Units on Tape and Reel

2.5 STD LP2982IM5-2.5 L58B 1000Units on Tape and Reel

2.6 A LP2982AIM5X-2.6 LBYA 3000 Units on Tape and Reel

2.6 A LP2982AIM5-2.6 LBYA 1000 Units on Tape and Reel

2.6 STD LP2982IM5X-2.6 LBYB 3000 Units on Tape and Reel

2.6 STD LP2982IM5-2.6 LBYB 1000Units on Tape and Reel

2.8 A LP2982AIM5X-2.8 L60A 3000 Units on Tape and Reel

2.8 A LP2982AIM5-2.8 L60A 1000 Units on Tape and Reel

2.8 STD LP2982IM5X-2.8 L60B 3000 Units on Tape and Reel

2.8 STD LP2982IM5-2.8 L60B 1000 Units on Tape and Reel

3.0 A LP2982AIM5X-3.0 L20A 3000 Units on Tape and Reel

3.0 A LP2982AIM5-3.0 L20A 1000 Units on Tape and Reel

3.0 STD LP2982IM5X-3.0 L20B 3000 Units on Tape and Reel

3.0 STD LP2982IM5-3.0 L20B 1000 Units on Tape and Reel

3.3 A LP2982AIM5X-3.3 L19A 3000 Units on Tape and Reel

3.3 A LP2982AIM5-3.3 L19A 1000 Units on Tape and Reel

3.3 STD LP2982IM5X-3.3 L19B 3000 Units on Tape and Reel

3.3 STD LP2982IM5-3.3 L19B 1000 Units on Tape and Reel

3.6 A LP2982AIM5X-3.6 L0BA 3000 Units on Tape and Reel

3.6 A LP2982AIM5-3.6 L0BA 1000 Units on Tape and Reel

3.6 STD LP2982IM5X-3.6 L0BB 3000 Units on Tape and Reel

3.6 STD LP2982IM5-3.6 L0BB 1000 Units on Tape and Reel

3.8 A LP2982AIM5X-3.8 L76A 3000 Units on Tape and Reel

3.8 A LP2982AIM5-3.8 L76A 1000 Units on Tape and Reel

3.8 STD LP2982IM5X-3.8 L76B 3000 Units on Tape and Reel

3.8 STD LP2982IM5-3.8 L76B 1000 Units on Tape and Reel

4.0 A LP2982AIM5X-4.0 L29A 3000 Units on Tape and Reel

4.0 A LP2982AIM5-4.0 L29A 1000 Units on Tape and Reel

4.0 STD LP2982IM5X-4.0 L29B 3000 Units on Tape and Reel

4.0 STD LP2982IM5-4.0 L29B 1000 Units on Tape and Reel

4.5 A LP2982AIM5X-4.5 LA8A 3000 Units on Tape and Reel

4.5 A LP2982AIM5-4.5 LA8A 1000 Units on Tape and Reel

4.5 STD LP2982IM5X-4.5 LA8B 3000 Units on Tape and Reel

4.5 STD LP2982IM5-4.5 LA8B 1000 Units on Tape and Reel

4.7 A LP2982AIM5X-4.7 L0HA 3000 Units on Tape and Reel

4.7 A LP2982AIM5-4.7 L0HA 1000 Units on Tape and Reel

4.7 STD LP2982IM5X-4.7 L0HB 3000 Units on Tape and Reel

4.7 STD LP2982IM5-4.7 L0HB 1000 Units on Tape and Reel

5.0 A LP2982AIM5X-5.0 L18A 3000 Units on Tape and Reel

5.0 A LP2982AIM5-5.0 L18A 1000 Units on Tape and Reel

5.0 STD LP2982IM5X-5.0 L18B 3000 Units on Tape and Reel

5.0 STD LP2982IM5-5.0 L18B 1000 Units on Tape and Reel

5.3 A LP2982AIM5X-5.3 LBZA 3000 Units on Tape and Reel

Package

Marking Supplied as:

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Ordering Information (Continued)

LP2982

Output Voltage

(V) Grade Order Information

5-Lead Small Outline Package (M5)

5.3 A LP2982AIM5-5.3 LBZA 1000 Units on Tape and Reel

5.3 STD LP2982IM5X-5.3 LBZB 3000 Units on Tape and Reel

5.3 STD LP2982IM5-5.3 LBZB 1000 Units on Tape and Reel

micro SMD, 5 Bump Package (BPA05)

2.8 A LP2982AIBP-2.8 250 Units on Tape and Reel

2.8 A LP2982AIBPX-2.8 3000 Units on Tape and Reel

2.8 STD LP2982IBP-2.8 250 Units on Tape and Reel

2.8 STD LP2982IBPX-2.8 3000 Units on Tape and Reel

3.0 A LP2982AIBP-3.0 250 Units on Tape and Reel

3.0 A LP2982AIBPX-3.0 3000 Units on Tape and Reel

3.0 STD LP2982IBP-3.0 250 Units on Tape and Reel

3.0 STD LP2982IBPX-3.0 3000 Units on Tape and Reel

TABLE 1. Package Marking and Ordering Information (Continued)

Package

Marking Supplied as:

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LP2982

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

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

(Survival) Short Circuit Protected

I

OUT

Input-Output Voltage (Survival, (Note 5)) −0.3V to +16V

ESD Rating (Note 2) 2 kV

Electrical Characteristics

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

IN=VO(NOM)

Symbol Parameter Conditions Typ LP2982AI-X.X LP2982I-X.X Units

∆V

O

Output Voltage
Tolerance

Output Voltage Line
Regulation

V

IN–VO

Dropout Voltage IL=0 133
(Note 7) 55

I

GND

V

ON/OFF

Ground Pin Current IL= 0 65 95 95

ON/OFF Input Voltage High = O/P ON 1.4 1.6 1.6
(Note 8) Low = O/P OFF 0.55 0.15 0.15

I

ON/OFF

I

O(PK)

V

IN–VO

I

GND

e

n

ON/OFF Input Current V

Peak Output Current V
Dropout Voltage IL= 80 mA 180 225 225 mV

Ground Pin Current IL= 80 mA 525 750 750 µA

Output Noise Voltage
(RMS)

+ 1V, IL= 1 mA, CIN= 1 µF, C

= 4.7 µF, V

OUT

ON/OFF

= 2V.

(Note 6) (Note 6)

Min Max Min Max

I

= 1 mA −1.0 +1.0 −1.5 +1.5

L

1mA<I

<

50 mA −1.5 +1.5 −2.0 +2.0

L

%V

−2.0 +2.0 −3.5 +3.5

V

+1V≤VIN≤ 16V

O(NOM)

0.007 0.014 0.014

0.032 0.032

I

= 1 mA 7 10 10

L

15 15

I

=10mA 406060

L

90 90

I

= 50 mA 120 150 150

L

225 225

125 125

I

= 1 mA 80 110 110

L

170 170

I

= 10 mA 140 220 220

L

460 460

I

= 50 mA 375 600 600

L

1200 1200

V
V

V

<

ON/OFF
ON/OFF

ON/OFF
ON/OFF
OUT

0.3V 0.01 0.8 0.8

<

0.15V 0.10 2.0 2.0

= 0 0.01 −2 −2
=5V 5 15 15

≥ V

− 5% 150 100 100 mA

O(NOM)

325 325

1400 1400

BW = 300 Hz–50 kHz,
C

OUT

C

BYPASS

=10µF

= 0.01 µF

30

NOM

%/V

mV

µA

V

µA

µV

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Electrical Characteristics (Continued)

LP2982

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=V

Symbol Parameter Conditions Typ LP2982AI-X.X LP2982I-X.X Units

Ripple Rejection f = 1 kHz

+ 1V, IL= 1 mA, CIN= 1 µF, C

O(NOM)

=10µF

C

OUT

OUT

= 4.7 µF, V

ON/OFF

= 2V.

(Note 6) (Note 6)

Min Max Min Max

45 dB

I

O(MAX)

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

the ambient temperature, T

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 LP2982 output must be diode-clamped to ground.
Note 5: The output PNP structure contains a diode between the V

will turn on this diode.
Note 6: 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 possible misoperation. For details, refer to Application Hints.
Note 9: See Typical Performance Characteristics curves.

Typical Performance Characteristics Unless otherwise specified: T

C

OUT

Output Voltage vs
Temperature

Short Circuit Current RL= 0 (Steady State)

(Note 9)

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

A

IN

and V

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

OUT

= 4.7 µF, CIN= 1 µF, all voltage options, ON/OFF pin tied to VIN.

Output Voltage vs
Temperature

150 mA

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

J(MAX)

= 25˚C, VIN=V

A

O(NOM)

+1V,

OUT

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