LP2987 Datasheet, PDF(1/24 Page) National Semiconductor (TI) – Micropower, 200 mA Ultra Low-Dropout Voltage Regulator with Programmable Power-On Reset Delay; Low Noise Version Available (LP2988)

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LP2987 Datasheet, PDF (1/24 Pages) National Semiconductor (TI) – Micropower, 200 mA Ultra Low-Dropout Voltage Regulator with Programmable Power-On Reset Delay; Low Noise Version Available (LP2988)

February 2002

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 VIPâ¢ (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 ÂµA @

10 mA load (typical).

Sleep Mode: The LP2987/8 draws less than 2 ÂµA 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%

(âAâ 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 ÂµA quiescent current when shutdown

n Low ground pin current at all loads

n 0.5% output voltage accuracy (âAâ grade)

n Wide supply voltage range (16V max)

n Overtemperature/overcurrent protection

n â40ËC to +125ËC junction temperature range

Applications

n Cellular Phone

n Palmtop/Laptop Computer

n Camcorder, Personal Stereo, Camera

Block Diagrams

10001701

VIPâ¢ is a trademark of National Semiconductor Corporation.

10001702

www.national.com

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