LP3875-ADJ

IN

OUT

ADJ

GND

CIN

COUT

INPUT

OUTPUT

1.5 A

R1

R2

CFF

SD

SD

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

LP3875-ADJ

SNVS247E – SEPTEMBER 2003 – REVISED AUGUST 2016

LP3875-ADJ 1.5-A Fast Ultra-Low-Dropout LDOs

1

1 Features

1

•

Input Voltage Range: 2.5 V to 7 V

•

Ultra Low Dropout Voltage

•

Low Ground Pin Current

•

Load Regulation of 0.06%

•

10-nA Quiescent Current in Shutdown Mode

•

Specified Output Current of 1.5-A DC

•

Minimum Output Capacitor Requirements

•

Overtemperature/Overcurrent Protection

•

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

•

Available in DDPAK/TO-263 and SOT-223

Packages

2 Applications

•

Microprocessor Power Supplies

•

GTL, GTL+, BTL, and SSTL Bus Terminators

•

Power Supplies for DSPs

•

SCSI Terminator

•

Post Regulators

•

High Efficiency Linear Regulators

•

Battery Chargers

•

Other Battery-Powered Applications

3 Description

The LP3875-ADJ fast ultra-low-dropout LDO operates

from a 2.5-V to 7-V input supply. This ultra-low-

dropout LDO responds very quickly to step changes

in load, which makes it suitable for low-voltage

microprocessor applications. The LP3875-ADJ is

developed on a CMOS process, which allows low

quiescent-current operation independent of output

load current. This CMOS process also allows the

LP3875-ADJ to operate under extremely low dropout

conditions.

•

Dropout

Voltage:

Ultra-low-dropout

voltage;

typically 38 mV at 150-mA load current and 380

mV at 1.5-A load current.

•

Ground Pin Current: Typically 6 mA at 1.5-A load

current.

•

Shutdown

Mode:

Typically

10-nA

quiescent

current when the SD pin is pulled low.

•

Adjustable Output Voltage: The output voltage

may be programmed via two external resistors.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

LP3875-ADJ

SOT-223 (5)

6.50 mm × 3.56 mm

TO-263 (5)

10.16 mm × 8.42 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

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Simplified Schematic