LP3987

Micropower micro SMD 150 mA Ultra Low-Dropout

CMOS Voltage Regulators with sleep MODE

General Description

The LP3987 is a 150mA fixed output voltage regulator with

very low dropout voltage designed specially to meet require-

ments of battery-powered applications. The additional sleep

MODE feature will reduce current consumption during

standby operation to prolong the usage of battery.

Dropout Voltage: 100mV maximum dropout with 150mA

load.

Shutdown: Less than 1µA quiescent current.

Sleep Mode: Typically 14µA quiescent current during sleep

MODE to reduce battery consumption.

Enhanced Stability: The LP3987 is stable with minimum

Ω

and high quality tantalum capacitors.

The LP3987 is available in thin and thick 5 Bump micro SMD

package. Performance is specified for −40˚C to 125˚C.

This device is available with output voltage options of 2.6V,

2.8V, & 2.85V. For other voltage options, please contact

National Semiconductor Corporation.

Features

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Miniature 5-I/O micro SMD package

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Stable with ceramic and high quality tantalum output

capacitors

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Logic controlled enable

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Thermal Shutdown and short-circuit current limit

Key Specifications

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2.7 to 6.0V input range

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Guaranteed 150 mA output current

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1µA quiescent current on shutdown

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100 mV maximum dropout with 150 mA load

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50dB PSRR at 10KHz

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Sleep MODE features

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Over temperature & over current protection

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−40˚C to +125˚C junction temperature range for

operation

Applications

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CDMA cellular handsets

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Wideband CDMA cellular handsets

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GSM cellular handsets

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Portable information appliances

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µP/DSP Power Supplies

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Digital Cameras

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SRAM Backup

Typical Application Circuit

20022201

February 2003

© 2003 National Semiconductor Corporation

DS200222

www.national.com