OUT

IN

GND

LP38513

EN

10 k:

ERROR

10 PF

Ceramic

10 PF

Ceramic

GND

GND

ON

OFF

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Reference

Design

LP38513

SNVS361E – JULY 2007 – REVISED NOVEMBER 2015

LP38513 3-A Fast Response Ultra-Low Dropout Linear Regulator

1 Features

3 Description

The LP38513 fast-response ultra-low dropout linear

1

•

Input Supply Voltage 2.25 V to 5.5 V

regulator operates from a 2.25-V to 5.5-V input

•

Conversions from 2.5-V Rail to 1.8-V Rail

supply. This device responds very quickly to step

•

Stable with Ceramic Capacitors

changes in line or load conditions, making it suitable

for

low-voltage

microprocessor

applications.

•

Low Ground Pin Current

Developed on a CMOS process, with a PMOS pass

•

Load Regulation of 0.1% for 10 mA to 3-A Load

transistor, the LP38513 has low quiescent-current

Current

operation independent of the output load current.

•

60-

μA Typical Quiescent Current in Shutdown

•

Ground Pin Current: Typically 12 mA at 3-A load

Mode

current.

•

Specified Output Current of 3 A

•

Disable Mode: Typically 60 µA quiescent current

when the enable (EN) pin is pulled low.

•

•

falls more than typically 15% below the nominal

•

value.

•

Overtemperature and Overcurrent Protection

•

Precision

Output

Voltage:

A

specified

•

2 Applications

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

Microprocessor Power Supplies

TO-220 (5)

14.986 mm × 10.16 mm

•

GTL, GTL+, BTL, and SSTL Bus Terminators

LP38513

DDPAK/TO-263 (5) 10.16 mm × 8.42 mm

•

Power Supplies for DSPs

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

•

SCSI Terminator

the end of the data sheet.

•

Post Regulators

•

Battery Chargers

•

Other Battery Powered Applications

Typical Application

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.