LP3855-ADJ

ADJ

GND

IN

OUT

INPUT

OUTPUT

1.5A

R1

**

R2

**

**

**

R1

R2

)

SD

SD

10 PF

10 PF

* TANTALUM OR

CERAMIC

LP3855-ADJ

www.ti.com

SNVS244F – SEPTEMBER 2003 – REVISED APRIL 2013

LP3855-ADJ 1.5A Fast Response Ultra Low Dropout Linear Regulators

Check for Samples: LP3855-ADJ

1

FEATURES

DESCRIPTION

The

LP3855-ADJ

fast

ultra

low-dropout

linear

2

•

Ultra Low Dropout Voltage

regulators operate from a +2.5V to +7.0V input

•

Stable with Selected Ceramic Capacitors

supply. These ultra low dropout linear regulators

•

Low Ground Pin Current

respond very quickly to step changes in load, which

makes them suitable for low voltage microprocessor

•

Load Regulation of 0.06%

applications. The LP3855-ADJ is developed on a

•

10nA Quiescent Current in Shutdown Mode

CMOS process which allows low quiescent current

•

Specified Output Current of 1.5A DC

operation independent of output load current. This

CMOS process also allows the LP3855-ADJ to

•

Available in DDPAK/TO-263, TO-220 and SOT-

operate under extremely low dropout conditions.

223 Packages

•

Overtemperature/Overcurrent Protection

Dropout Voltage: Ultra low dropout voltage; typically

24mV at 150mA load current and 240mV at 1.5A load

•

−40°C to +125°C Junction Temperature Range

current.

APPLICATIONS

Ground Pin Current: Typically 4mA at 1.5A load

current.

•

Microprocessor Power Supplies

Shutdown Mode: Typically 10nA quiescent current

•

GTL, GTL+, BTL, and SSTL Bus Terminators

when the shutdown pin is pulled low.

•

Power Supplies for DSPs

Adjustable Output Voltage: The output voltage may

•

SCSI Terminator

be programmed via two external resistors.

•

Post Regulators

•

High efficiency linear regulators

•

Battery chargers

•

Other battery powered applications

TYPICAL APPLICATION CIRCUIT

**See Application Hints.

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2003–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.