LP2987/LP2988
Micropower, 200 mA Ultra Low-Dropout Voltage
Regulator with Programmable Power-On Reset Delay;
Low Noise Version Available (LP2988)
General Description
The LP2987/8 are fixed-output 200 mA precision LDO volt-
age regulators with power-ON reset delay which can be
implemented using a single external capacitor.
The LP2988 is specifically designed for noise-critical appli-
cations. A single external capacitor connected to the Bypass
pin reduces regulator output noise.
Using an optimized VIP
TM
(Vertically Integrated PNP) pro-
cess, these regulators deliver superior performance:
Dropout Voltage: 180 mV
@
200 mA load, and 1 mV
@
1 mA
load (typical).
Ground Pin Current: 1 mA
@
200 mA load, and 200 A
@
10 mA load (typical).
Sleep Mode: The LP2987/8 draws less than 2 A 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 pro-
vides 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.
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
>
250 mA
n
SO-8 and mini SO-8 surface mount packages
n
<
2 A 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
-40C to +125C junction temperature range
Applications
n
Cellular Phone
n
Palmtop/Laptop Computer
n
Camcorder, Personal Stereo, Camera
Block Diagrams
VIP
TM
is a trademark of National Semiconductor Corporation.
DS100017-1
DS100017-2
March 1999
LP2987/LP2988
Micropower
,
200
mA
Ultra
Low-Dropout
V
oltage
Regulator
with
Programmable
Power-On
Reset
Delay
1999 National Semiconductor Corporation
DS100017
www.national.com
Connection Diagram (LP2987)
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
Surface Mount Packages:
Mini SO-8 Package Type MM: See NS Package Drawing Number MUA08A
SO-8 Package Type M: See NS Package Drawing Number M08A
DS100017-3
Top View
For ordering information, refer to
Table 1 in this document.
www.national.com
2
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
www.national.com
3
Connection Diagram (LP2988)
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
Surface Mount Packages:
Mini SO-8 Package Type MM: See NS Package Drawing Number MUA08A
SO-8 Package Type M: See NS Package Drawing Number M08A
DS100017-16
Top View
For ordering information, refer to
Table 2 in this document.
www.national.com
4
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
www.national.com
5
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