LP3962EP/LP3965EP

1.5A Fast Ultra Low Dropout Linear Regulators

General Description

The LP3962EP/LP3965EP series of fast ultra low-dropout

linear regulators operate from a +2.5V to +7.0V input supply.

Wide range of preset output voltage options are available.

These ultra low dropout linear regulators respond very fast to

step changes in load which makes them suitable for low

voltage

microprocessor

applications.

The

LP3962EP/

LP3965EP are developed on a CMOS process which allows

low quiescent current operation independent of output load

current. This CMOS process also allows the LP3962EP/

LP3965EP to operate under extremely low dropout condi-

tions.

Dropout Voltage: Ultra low dropout voltage; typically 38mV

at 150mA load current and 380mV at 1.5A load current.

Ground Pin Current: Typically 5mA at 1.5A load current.

Shutdown Mode: Typically 15µA quiescent current when

the shutdown pin is pulled low.

Error Flag: Error flag goes low when the output voltage

drops 10% below nominal value (for LP3962EP).

SENSE: Sense pin improves regulation at remote loads.

(For LP3965EP)

Precision Output Voltage: Multiple output voltage options

are available ranging from 1.2V to 5.0V and adjustable

load, and temperature).

ENHANCED PLASTIC

•

Extended Temperature Performance of −40˚C to +125˚C

•

Baseline Control - Single Fab & Assembly Site

•

Process Change Notification (PCN)

•

Qualification & Reliability Data

•

Solder (PbSn) Lead Finish is standard

•

Enhanced Diminishing Manufacturing Sources (DMS)

Support

Features

n

Ultra low dropout voltage

n

Low ground pin current

n

Load regulation of 0.04%

n

15µA quiescent current in shutdown mode

n

Guaranteed output current of 1.5A DC

n

Available in SOT-223,TO-263 and TO-220 packages

n

n

Error flag indicates output status (LP3962EP)

n

Sense option improves better load regulation

(LP3965EP)

n

Extremely low output capacitor requirements

n

Overtemperature/overcurrent protection

Applications

n

Microprocessor power supplies

n

GTL, GTL+, BTL, and SSTL bus terminators

n

Power supplies for DSPs

n

SCSI terminator

n

Post regulators

n

High efficiency linear regulators

n

Selected Military Applications

n

Selected Avionics Applications

Ordering Information

PART NUMBER

VID PART NUMBER

NS PACKAGE NUMBER (Note 3)

LP3962ES-2.5EP

V62/04751-01

TS5B

LP3965ES-2.5EP

V62/04751-02

TS5B

LP3965ES-ADJEP

V62/04751-03

TS5B

(Notes 1, 2)

TBD

TBD

Note 1: For the following (Enhanced Plastic) version, check for availability: LP3962EMP-1.8EP, LP3962EMP2.5EP, LP3962EMP-3.3EP, LP3962EMP-

5.0EP, LP3962EMPX1.8EP, LP3962EMPX2.5EP, LP3962EMPX3.3EP, LP3962EMPX5.0EP, LP3962ET-1.8EP, LP3962ET-2.5EP, LP3962ET-3.3EP,

LP3962ET-5.0EP, LP3962ES-1.8EP, LP3962EX-3.3EP, LP3962ES-5.0EP, LP3962ESX-1.8EP, LP3962ESX-2.5EP, LP3962ESX-3.3EP, LP3962ESX-5.0EP,

LP3965EMP-1.8EP,

LP3965EMP-2.5EP,

LP3965EMP-3.3EP,

LP3965EMP-5.0EP,

LP3965EMP-ADJEP,

LP3965EMPX1.8EP,

LP3965EMPX2.5EP,

LP3965EMPX3.3EP, LP3965EMPX5.0EP, LP3965EMPXADJEP, LP3965ET-1.8EP, LP3965ET-2.5EP, LP3965ET-3.3EP, LP3965ET-5.0EP, LP3965ET-

ADJEP,

LP3965ES-1.8EP,

LP3965ES-3.3EP,

LP3965ES-5.0EP,

LP3965ESX-1.8EP,

LP3965ESX-2.5EP,

LP3965ESX-3.3EP,

LP3965ESX-5.0EP,

LP3965ESX-ADJEP. Parts listed with an "X" are provided in Tape & Reel and parts without an "X" are in Rails.

Note 2: FOR ADDITIONAL ORDERING AND PRODUCT INFORMATION, PLEASE VISIT THE ENHANCED PLASTIC WEB SITE AT: www.national.com/

mil

Note 3: Refer to package details under Physical Dimensions

January 2005

© 2005 National Semiconductor Corporation

DS201147

www.national.com