LP3965ET-ADJ National Semiconductor, LP3965ET-ADJ Datasheet

LP3965ET-ADJ

Manufacturer Part Number

LP3965ET-ADJ

Description

Manufacturer

National Semiconductor

Datasheets

1.LP3965ESX-ADJ.pdf (22 pages)

2.LP3965ESX-ADJ.pdf (22 pages)

3.LP3965ESX-ADJ.pdf (20 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

LP3965ET-ADJ

Manufacturer:

NS/国半

Quantity:

20 000

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LP3962/LP3965

1.5A Fast Ultra Low Dropout Linear Regulators

General Description

The LP3962/LP3965 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 LP3962/LP3965 are de-

veloped on a CMOS process which allows low quiescent

current operation independent of output load current. This

CMOS process also allows the LP3962/LP3965 to operate

under extremely low dropout conditions.

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 LP3962).

SENSE: Sense pin improves regulation at remote loads.

(For LP3965)

Precision Output Voltage: Multiple output voltage options

are available ranging from 1.2V to 5.0V and adjustable

(LP3965), with a guaranteed accuracy of

temperature, and

load, and temperature).

Typical Application Circuits

*SD and ERROR pins must be pulled high through a 10kΩ pull-up resistor. Connect the ERROR pin to ground if this function is not used. See applications

section for more information.

** See Application Hints.

3.0% over all conditions (varying line,

DS101266

1.5% at room

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 Output voltage accuracy

n Error flag indicates output status (LP3962)

n Sense option improves better load regulation (LP3965)

n Extremely low output capacitor requirements

n Overtemperature/overcurrent protection

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

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 Battery chargers

n Other battery powered applications

1.5%

September 2006

www.national.com

10126601

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