IN

BIAS

GND

OUT

10 PF Ceramic

10 PF

Ceramic

1 PF

GND

GND

LP38852-ADJ

ADJ

R1

R2

SS

EN

LP38852

www.ti.com

SNVS482E – JANUARY 2007 – REVISED APRIL 2013

1.5A Fast-Response High-Accuracy Adjustable LDO Linear Regulator with Enable and

Soft-Start

Check for Samples: LP38852

1

FEATURES

DESCRIPTION

The LP38852-ADJ is a high current, fast response

2

•

regulator

which

can

maintain

output

voltage

•

regulation with extremely low input to output voltage

5.5V

drop. Fabricated on a CMOS process, the device

•

Stable with 10µF Ceramic Capacitors

voltage to drive the gate of the N-MOS power

•

Dropout Voltage of 130 mV (Typical) at 1.5A

Load Current

supplies power to the load. The use of an external

•

Precision Output Voltage across All Line and

Load Conditions:

voltages.

Unlike

bipolar

regulators,

the

CMOS

architecture

consumes

extremely

low

quiescent

–

current at any output load current. The use of an N-

–

MOS power transistor results in wide bandwidth, yet

–

minimum external capacitance is required to maintain

•

Over-Temperature and Over-Current

loop stability.

Protection

The fast transient response of this device makes it

•

Available in 8 Lead SO PowerPAD, 7 Lead TO-

suitable for use in powering DSP, Microcontroller

220 and 7 Lead DDPAK Packages

Core voltages and Switch Mode Power Supply post

regulators. The part is available in the TO-220 and

•

−40°C to +125°C Operating Junction

DDPAK 7-pin packages.

Temperature Range

Dropout Voltage: 130 mV (typical) at 1.5A load

APPLICATIONS

current.

•

ASIC Power Supplies In:

Low Ground Pin Current: 10 mA (typical) at 1.5A

load current.

–

Desktops, Notebooks, and Graphics Cards,

Servers

Soft-Start: Programmable Soft-Start time.

–

Gaming Set Top Boxes, Printers and

Copiers

±2.0% for 0°C

•

Server Core and I/O Supplies

conditions

•

DSP and FPGA Power Supplies

•

SMPS Post-Regulator

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.