LP2987IM-3.3 반도체 회로 부품 판매점
Micropower/ 200 mA Ultra Low-Dropout Voltage Regulator with Programmable Power-On Reset Delay; Low Noise Version Available (LP2988)
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 National Semiconductor |
March 1999
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™ (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 µA @
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 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 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
Applications
n Cellular Phone
n Palmtop/Laptop Computer
n Camcorder, Personal Stereo, Camera
Block Diagrams
DS100017-1
VIP™ is a trademark of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation DS100017
DS100017-2
www.national.com
Connection Diagram (LP2987)
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.
Ordering Information (LP2987)
Output Voltage
5
5
5
5
3.8
3.8
3.8
3.8
3.3
3.3
3.3
3.3
3.2
3.2
3.2
3.2
3.0
3.0
3.0
3.0
2.8
2.8
2.8
2.8
5
5
5
5
3.8
3.8
3.8
3.8
3.3
3.3
TABLE 1. Package Marking and Ordering Information
Grade
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
A
A
Order Information
LP2987AIMMX-5.0
LP2987AIMM-5.0
LP2987IMMX-5.0
LP2987IMM-5.0
LP2987AIMMX-3.8
LP2987AIMM-3.8
LP2987IMMX-3.8
LP2987IMM-3.8
LP2987AIMMX-3.3
LP2987AIMM-3.3
LP2987IMMX-3.3
LP2987IMM-3.3
LP2987AIMMX-3.2
LP2987AIMM-3.2
LP2987IMMX-3.2
LP2987IMM-3.2
LP2987AIMMX-3.0
LP2987AIMM-3.0
LP2987IMMX-3.0
LP2987IMM-3.0
LP2987AIMMX-2.8
LP2987AIMM-2.8
LP2987IMMX-2.8
LP2987IMM-2.8
LP2987AIMX-5.0
LP2987AIM-5.0
LP2987IMX-5.0
LP2987IM-5.0
LP2987AIMX-3.8
LP2987AIM-3.8
LP2987IMX-3.8
LP2987IM-3.8
LP2987AIMX-3.3
LP2987AIM-3.3
Package Marking
L44A
L44A
L44B
L44B
L96A
L96A
L96B
L96B
L43A
L43A
L43B
L43B
L66A
L66A
L66B
L66B
L42A
L42A
L42B
L42B
L89A
L89A
L89B
L89B
2987AIM5.0
2987AIM5.0
2987IM5.0
2987IM5.0
2987AIM3.8
2987AIM3.8
2987IM3.8
2987IM3.8
2987AIM3.3
2987AIM3.3
Supplied as:
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
2.5k Units on Tape and Reel
Shipped in Anti-Static Rails
2.5k Units on Tape and Reel
Shipped in Anti-Static Rails
2.5k Units on Tape and Reel
Shipped in Anti-Static Rails
2.5k Units on Tape and Reel
Shipped in Anti-Static Rails
2.5k Units on Tape and Reel
Shipped in Anti-Static Rails
www.national.com
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