NSC LP2988IM-2.5, LP2988AIMX-3.3, LP2988AIMX-3.0, LP2988AIMX-2.5, LP2988AIMMX-5.0 Datasheet

March 1999

LP2987/LP2988
Micropower, 200 mA Ultra Low-Dropout Voltage
Regulator with Programmable Power-On Reset Delay;
Low Noise Version Available (LP2988)

LP2987/LP2988 Micropower, 200 mA Ultra Low-Dropout Voltage Regulator with Programmable

Power-On Reset Delay

General Description

The LP2987/8 are fixed-output 200 mA precision LDO volt­age regulators with power-ON reset delay which can be
implemented using a single external capacitor.

The LP2988 is specifically designed for noise-critical appli­cations. Asingle external capacitor connected to the Bypass
pin reduces regulator output noise.

Using an optimized VIP
cess, these regulators deliver superior performance:

Dropout Voltage:180mV
load (typical).

Ground Pin Current: 1mA
10 mA load (typical).

Sleep Mode: The LP2987/8 draws less than 2 µA quiescent
current when shutdown pin is held low.

Error Flag/Reset: The error flag goes low when the output
drops approximately 5%below nominal. This pin also pro­vides a power-ON reset signal if a capacitor is connected to
the DELAY pin.

Precision Output: Standard product versions of the LP2987
and LP2988 are available with output voltages of 5.0V, 3.8V,

3.3V, 3.2V, 3.0V, or 2.8V, with guaranteed accuracy of 0.5
(“A” grade) and 1%(standard grade) at room temperature.

™

(Vertically Integrated PNP) pro-

@

200 mAload,and1mV@1mA

@

200 mA load, and 200 µA

Block Diagrams

Features

n Ultra low dropout voltage
n Power-ON reset delay requires only one component
n Bypass pin for reduced output noise (LP2988)
n Guaranteed continuous output current 200 mA
n Guaranteed peak output current
n SO-8 and mini SO-8 surface mount packages

<

n

2 µA quiescent current when shutdown

n Low ground pin current at all loads
n 0.5%output voltage accuracy (“A” grade)
n Wide supply voltage range (16V max)

@

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

>

250 mA

Applications

n Cellular Phone
n Palmtop/Laptop Computer
n Camcorder, Personal Stereo, Camera

%

DS100017-1

VIP™is a trademark ofNational Semiconductor Corporation.

© 1999 National Semiconductor Corporation DS100017 www.national.com

DS100017-2

Connection Diagram (LP2987)

Mini SO-8 Package Type MM: See NS Package Drawing Number MUA08A

SO-8 Package Type M: See NS Package Drawing Number M08A

For ordering information, refer to

Surface Mount Packages:

DS100017-3

Top View

Table 1

in this document.

Ordering Information (LP2987)

TABLE 1. Package Marking and Ordering Information

Output Voltage Grade Order Information Package Marking Supplied as:

5 A LP2987AIMMX-5.0 L44A 3.5k Units on Tape and Reel
5 A LP2987AIMM-5.0 L44A 250 Units on Tape and Reel
5 STD LP2987IMMX-5.0 L44B 3.5k Units on Tape and Reel
5 STD LP2987IMM-5.0 L44B 250 Units on Tape and Reel

3.8 A LP2987AIMMX-3.8 L96A 3.5k Units on Tape and Reel

3.8 A LP2987AIMM-3.8 L96A 250 Units on Tape and Reel

3.8 STD LP2987IMMX-3.8 L96B 3.5k Units on Tape and Reel

3.8 STD LP2987IMM-3.8 L96B 250 Units on Tape and Reel

3.3 A LP2987AIMMX-3.3 L43A 3.5k Units on Tape and Reel

3.3 A LP2987AIMM-3.3 L43A 250 Units on Tape and Reel

3.3 STD LP2987IMMX-3.3 L43B 3.5k Units on Tape and Reel

3.3 STD LP2987IMM-3.3 L43B 250 Units on Tape and Reel

3.2 A LP2987AIMMX-3.2 L66A 3.5k Units on Tape and Reel

3.2 A LP2987AIMM-3.2 L66A 250 Units on Tape and Reel

3.2 STD LP2987IMMX-3.2 L66B 3.5k Units on Tape and Reel

3.2 STD LP2987IMM-3.2 L66B 250 Units on Tape and Reel

3.0 A LP2987AIMMX-3.0 L42A 3.5k Units on Tape and Reel

3.0 A LP2987AIMM-3.0 L42A 250 Units on Tape and Reel

3.0 STD LP2987IMMX-3.0 L42B 3.5k Units on Tape and Reel

3.0 STD LP2987IMM-3.0 L42B 250 Units on Tape and Reel

2.8 A LP2987AIMMX-2.8 L89A 3.5k Units on Tape and Reel

2.8 A LP2987AIMM-2.8 L89A 250 Units on Tape and Reel

2.8 STD LP2987IMMX-2.8 L89B 3.5k Units on Tape and Reel

2.8 STD LP2987IMM-2.8 L89B 250 Units on Tape and Reel
5 A LP2987AIMX-5.0 2987AIM5.0 2.5k Units on Tape and Reel
5 A LP2987AIM-5.0 2987AIM5.0 Shipped in Anti-Static Rails
5 STD LP2987IMX-5.0 2987IM5.0 2.5k Units on Tape and Reel
5 STD LP2987IM-5.0 2987IM5.0 Shipped in Anti-Static Rails

3.8 A LP2987AIMX-3.8 2987AIM3.8 2.5k Units on Tape and Reel

3.8 A LP2987AIM-3.8 2987AIM3.8 Shipped in Anti-Static Rails

3.8 STD LP2987IMX-3.8 2987IM3.8 2.5k Units on Tape and Reel

3.8 STD LP2987IM-3.8 2987IM3.8 Shipped in Anti-Static Rails

3.3 A LP2987AIMX-3.3 2987AIM3.3 2.5k Units on Tape and Reel

3.3 A LP2987AIM-3.3 2987AIM3.3 Shipped in Anti-Static Rails

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Ordering Information (LP2987) (Continued)

TABLE 1. Package Marking and Ordering Information (Continued)

Output Voltage Grade Order Information Package Marking Supplied as:

3.3 STD LP2987IMX-3.3 2987IM3.3 2.5k Units on Tape and Reel

3.3 STD LP2987IM-3.3 2987IM3.3 Shipped in Anti-Static Rails

3.2 A LP2987AIMX-3.2 2987AIM3.2 2.5k Units on Tape and Reel

3.2 A LP2987AIM-3.2 2987AIM3.2 Shipped in Anti-Static Rails

3.2 STD LP2987IMX-3.2 2987IM3.2 2.5k Units on Tape and Reel

3.2 STD LP2987AIM-3.2 2987IM3.2 Shipped in Anti-Static Rails

3.0 A LP2987IMX-3.0 2987AIM3.0 2.5k Units on Tape and Reel

3.0 A LP2987AIM-3.0 2987AIM3.0 Shipped in Anti-Static Rails

3.0 STD LP2987IMX-3.0 2987IM3.0 2.5 Units on Tape and Reel

3.0 STD LP2987IM-3.0 2987IM3.0 Shipped in Anti-Static Rails

2.8 A LP2987AIMX-2.8 2987AIM2.8 2.5 Units on Tape and Reel

2.8 A LP2987AIM-2.8 2987AIM2.8 Shipped in Anti-Static Rails

2.8 STD LP2987IMX-2.8 2987IM2.8 2.5 Units on Tape and Reel

2.8 STD LP298AIM-2.8 298AIM2.8 Shipped in Anti-Static Rails

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Connection Diagram (LP2988)

Mini SO-8 Package Type MM: See NS Package Drawing Number MUA08A

SO-8 Package Type M: See NS Package Drawing Number M08A

For ordering information, refer to

Surface Mount Packages:

DS100017-16

Top View

Table 2

in this document.

Ordering Information (LP2988)

TABLE 2. Package Marking and Ordering Information

Output Voltage Grade Order Information Package Marking Supplied as:

5 A LP2988AIMMX-5.0 L51A 3.5k Units on Tape and Reel
5 A LP2988AIMM-5.0 L51A 250 Units on Tape and Reel
5 STD LP2988IMMX-5.0 L51B 3.5k Units on Tape and Reel
5 STD LP2988IMM-5.0 L51B 250 Units on Tape and Reel

3.8 A LP2988AIMMX-3.8 L0AA 3.5k Units on Tape and Reel

3.8 A LP2988AIMM-3.8 L0AA 250 Units on Tape and Reel

3.8 STD LP2988IMMX-3.8 L0AB 3.5k Units on Tape and Reel

3.8 STD LP2988IMM-3.8 L0AB 250 Units on Tape and Reel

3.3 A LP2988AIMMX-3.3 L50A 3.5k Units on Tape and Reel

3.3 A LP2988AIMM-3.3 L50A 250 Units on Tape and Reel

3.3 STD LP2988IMMX-3.3 L50B 3.5k Units on Tape and Reel

3.3 STD LP2988IMM-3.3 L50B 250 Units on Tape and Reel

3.2 A LP2988AIMMX-3.2 L67A 3.5k Units on Tape and Reel

3.2 A LP2988AIMM-3.2 L67A 250 Units on Tape and Reel

3.2 STD LP2988IMMX-3.2 L67B 3.5k Units on Tape and Reel

3.2 STD LP2988IMM-3.2 L67B 250 Units on Tape and Reel

3.0 A LP2988AIMMX-3.0 L49A 3.5k Units on Tape and Reel

3.0 A LP2988AIMM-3.0 L49A 250 Units on Tape and Reel

3.0 STD LP2988IMMX-3.0 L49B 3.5k Units on Tape and Reel

3.0 STD LP2988IMM-3.0 L49B 250 Units on Tape and Reel

2.8 A LP2988AIMMX-2.8 L0IA 3.5k Units on Tape and Reel

2.8 A LP2988AIMM-2.8 L0IA 250 Units on Tape and Reel

2.8 STD LP2988IMMX-2.8 L0IB 3.5k Units on Tape and Reel

2.8 STD LP2988IMM-2.8 L0IB 250 Units on Tape and Reel
5 A LP2988AIMX-5.0 2988AIM5.0 2.5k Units on Tape and Reel
5 A LP2988AIM-5.0 2988AIM5.0 Shipped in Anti-Static Rails
5 STD LP2988IMX-5.0 2988IM5.0 2.5k Units on Tape and Reel
5 STD LP2988IM-5.0 2988IM5.0 Shipped in Anti-Static Rails

3.8 A LP2988AIMX-3.8 2988AIM3.8 2.5k Units on Tape and Reel

3.8 A LP2988AIM-3.8 2988AIM3.8 Shipped in Anti-Static Rails

3.8 STD LP2988IMX-3.8 2988IM3.8 2.5k Units on Tape and Reel

3.8 STD LP2988IM-3.8 2988IM3.8 Shipped in Anti-Static Rails

3.3 A LP2988AIMX-3.3 2988AIM3.3 2.5k Units on Tape and Reel

3.3 A LP2988AIM-3.3 2988AIM3.3 Shipped in Anti-Static Rails

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Ordering Information (LP2988) (Continued)

TABLE 2. Package Marking and Ordering Information (Continued)

Output Voltage Grade Order Information Package Marking Supplied as:

3.3 STD LP2988IMX-3.3 2988IM3.3 2.5k Units on Tape and Reel

3.3 STD LP2988IM-3.3 2988IM3.3 Shipped in Anti-Static Rails

3.2 A LP2988AIMX-3.2 2988AIM3.2 2.5k Units on Tape and Reel

3.2 A LP2988AIM-3.2 2988AIM3.2 Shipped in Anti-Static Rails

3.2 STD LP2988IMX-3.2 2988IM3.2 2.5k Units on Tape and Reel

3.2 STD LP2988IM-3.2 2988IM3.2 Shipped in Anti-Static Rails

3.0 A LP2988AIMX-3.0 2988AIM3.0 2.5k Units on Tape and Reel

3.0 A LP2988AIM-3.0 2988AIM3.0 Shipped in Anti-Static Rails

3.0 STD LP2988IMX-3.0 2988IM3.0 2.5 Units on Tape and Reel

3.0 STD LP2988IM-3.0 2988IM3.0 Shipped in Anti-Static Rails

2.8 A LP2988AIMX-2.8 2988AIM2.8 2.5 Units on Tape and Reel

2.8 A LP2988AIM-2.8 2988AIM2.8 Shipped in Anti-Static Rails

2.8 STD LP2988IMX-2.8 2988IM2.8 2.5 Units on Tape and Reel

2.8 STD LP2988IM-2.8 2988IM2.8 Shipped in Anti-Static Rails

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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 seconds) 260˚C

Input Supply Voltage

(Operating) 2.1V to +16V
Shutdown Pin −0.3V to +16V
Sense Pin −0.3V to +6V
Output Voltage

(Survival) (Note 4) −0.3V to +16V
I

(Survival) Short Circuit Protected

OUT

Input-Output Voltage

(Survival) (Note 5) −0.3V to +16V

ESD Rating (Note 2) 2 kV
Power Dissipation (Note 3) Internally Limited
Input Supply Voltage

(Survival) −0.3V to +16V

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: VIN=VO(NOM) + 1V, IL= 1 mA, C

Symbol Parameter Conditions Typical

∆V

O

V

IN–VO

I

GND

I

(PK) Peak Output Current V

O

(MAX) Short Circuit Current RL= 0 (Steady State)

I

O

e

n

Output Voltage
Tolerance

Output Voltage Line
Regulation

Dropout Voltage

0.1 mA<I

VO(NOM) + 1V ≤ VIN≤
16V

IL= 100 µA

(Note 7)

=75mA

I

L

I

= 200 mA

L

Ground Pin Current IL= 100 µA

I

=75mA

L

I

= 200 mA

L

<

0.3V 0.05 1.5 1.5 µA

V

S/D

≥ VO(NOM) − 5

OUT

(Note 10)

LP2987 Output Noise
Voltage (RMS)

LP2988 Output Noise
Voltage (RMS)

BW = 300 Hz to
50 kHz, V

=10µF

C

OUT

BW = 300 Hz to
50 kHz, V

=10µF

C

OUT

= .01 µF

C

BYPASS

Ripple Rejection f = 1 kHz, C

=

0 (LP2988)

C

BYP

Output Voltage

(Note 9)

OUT

OUT

L

<

= 3.3V

= 3.3V

OUT

Temperature Coefficient

= 4.7 µF, CIN= 2.2 µF, V

OUT

LM2987/8AI-X.X

(Note 6)

= 2V.

S/D

LM2987/8I-X.X

(Note 6)

Min Max Min Max

−0.5 0.5 −1.0 1.0

200 mA −0.8 0.8 −1.6 1.6

−1.8 1.8 −2.8 2.8

0.007

1

90

180

100

500

1

%

400 250 250

0.014 0.014

0.032 0.032

2.0 2.0

3.5 3.5

120 120

170 170

230 230

350 350

120 120

150 150

800 800

1400 1400

2.1 2.1

3.7 3.7

400

100

20

=10µF

65 dB

20 ppm/˚C

%

µV(RMS)

Units

V

NOM

%

/V

mV

µA

mA

mA

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