OUT

GND

LP3855-2.5

10 2F

INPUT

10 2F

SD

SD

**

SENSE

2.5V, 1.5A

3.3V ± 10%

* TANTALUM OR CERAMIC

IN

OUT

IN

GND

LP3852-2.5

10 2F

INPUT

10 2F

ERROR

**

SD

SD

**

ERROR

2.5V, 1.5A

3.3V ± 10%

* TANTALUM OR CERAMIC

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LP3852, LP3855

SNVS174I – FEBRUARY 2003 – REVISED FEBRUARY 2015

LP385x 1.5-A Fast Response Ultra-Low Dropout Linear Regulators

1 Features

3 Description

The LP3852 and LP3855 series of fast ultra-low

1

•

Input Supply Voltage: 2.5 V to 7 V

dropout linear regulators operate from a 2.5-V to 7-V

•

Ultra-Low Dropout Voltage

input supply. A wide range of preset output voltage

•

Stable with Selected Ceramic Capacitors

options are available. These ultra-low dropout linear

regulators respond very quickly to step changes in

•

Low Ground-Pin Current

load, which makes them suitable for low voltage

•

Load Regulation of 0.06%

microprocessor

applications.

The

LP3852

and

•

10-nA Quiescent Current in Shutdown Mode

LP3855 are developed on a CMOS process which

allows low quiescent-current operation independent

•

Specified Output Current of 1.5 A DC

of output load current, typically 4 mA at 1.5-A load

•

Output Voltage Accuracy ± 1.5%

current. This CMOS process also allows the LP3852

•

ERROR Pin Indicates Output Status

and LP3855 to operate under extremely low dropout

•

SENSE Option Improves Load Regulation

conditions, typically 24 mV at 150-mA load current

and 240 mV at 1.5-A load current.

•

Overtemperature/Overcurrent Protection

•

−40°C to 125°C Junction Temperature Range

The LP3852 has an ERROR pin; it goes low when

the output voltage drops 10% below nominal value.

The LP3855 has a SENSE pin to improves regulation

2 Applications

at remote loads.

•

Microprocessor Power Supplies

The LP3852 and LP3855 are available with fixed

•

GTL, GTL+, BTL, and SSTL Bus Terminators

output voltages from 1.8 V to 5 V with a specified

•

Power Supplies for DSPs

accuracy of ±1.5% at room temperature, and ±3%

•

SCSI Terminator

over

all

conditions

(varying

line,

load,

and

temperature). Contact Texas Instruments Sales for

•

Post Regulators

specific voltage option needs.

•

High Efficiency Linear Regulators

•

Battery Chargers

Device Information(1)

•

Other Battery Powered Applications

PART NUMBER

PACKAGE

BODY SIZE (NOM)

SOT (5)

6.50 mm x 3.56 mm

LP3852

TO-263 (5)

10.16 mm x 8.42 mm

LP3855

TO-220 (5)

14.986 mm x 10.16 mm

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

the end of the datasheet.

4 Simplified Schematics

**SD and ERROR pins must be pulled high through a 10-k

Ω pull-up resistor. Connect the ERROR pin to ground if this

function is not used.

**SD must be pulled high through a 10-k

Ω pull-up resistor.

1

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.