OUT

IN

GND

LP38511

VIN

VOUT

EN

VEN

10 k:

ERROR

VERROR

CIN

10 PF

Ceramic

COUT

10 PF

Ceramic

GND

GND

ON

OFF

LP38511

www.ti.com

SNOSAU6E – NOVEMBER 2007 – REVISED APRIL 2013

LP38511-1.8 800 mA Fast-Transient Response Low-Dropout Linear Voltage Regulator with

Error Flag

Check for Samples: LP38511

1

FEATURES

DESCRIPTION

The LP38511-1.8 Fast-Transient Response Low-

2

•

2.25V to 5.5V Input Voltage Range

Dropout

Voltage

Regulator

offers

the

highest-

•

1.8V Fixed Output Voltage

performance in meeting AC and DC accuracy

•

800 mA Output Load Current

requirements

for

powering

Digital

Cores.

The

LP38511-1.8 uses a proprietary control loop that

•

+/- 2.5% VOUT Accuracy over Line, Load, and

enables extremely fast response to change in line

Full-Temperature Range from -40°C to +125°C

conditions and load demands. Output Voltage DC

•

Stable with tiny 10 µF Ceramic Capacitors

accuracy is specified at ±2.5% over line, load and full

•

0.20% Output Voltage Load Regulation from 10

temperature range from -40°C to +125°C. The

mA to 800 mA

LP38511-1.8 is designed for inputs from the 2.5V,

3.3V, and 5.0V rail, is stable with 10uF ceramic

•

Enable pin

capacitors, and has a fixed 1.8V output. An Error Flag

•

Error Flag Indicates Status of Output Voltage

feature monitors the output voltage and notifies the

•

1 µA of Quiescent Current in Shutdown

system processor when the output voltage falls more

than 15% below the nominal value. The LP38511-1.8

•

40dB of PSRR at 100 kHz

provides excellent transient performance to meet the

•

Over-Temperature and Over-Current

demand of high performance digital core ASICs,

Protection

DSPs,

and

FPGAs

found

in

highly-intensive

•

DDPAK/TO-263 and PFM Surface Mount

applications such as servers, routers/switches, and

base stations.

Packages

APPLICATIONS

•

Digital Core ASICs, FPGAs, and DSPs

•

Servers

•

Routers and Switches

•

Base Stations

•

Storage Area Networks

•

DDR2 Memory

Typical Application Circuit

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 © 2007–2013, 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.