SS

IN

BIAS

GND

OUT

10 PF Ceramic

10 PF

Ceramic

1 PF

GND

GND

LP38858-x.x

LP38858

www.ti.com

SNVS462D – OCTOBER 2006 – REVISED APRIL 2013

1.5A Fast-Response High-Accuracy LDO Linear Regulator with Soft-Start

Check for Samples: LP38858

1

FEATURES

DESCRIPTION

The LP38858 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 5 Lead TO-220 and DDPAK/TO-263

suitable for use in powering DSP, Microcontroller

Packages

Core voltages and Switch Mode Power Supply post

regulators. The LP38858 is available in TO-220 and

•

DDPAK/TO-263 5-Lead packages.

are Available

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

•

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

current.

APPLICATIONS

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

load current.

•

ASIC Power Supplies In:

–

Desktops, Notebooks, and Graphics Cards,

Soft-Start: Programmable Soft-Start time.

Servers

–

Gaming Set Top Boxes, Printers and

±2.0% for 0°C

Copiers

conditions

•

Server Core and I/O Supplies

•

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 © 2006–2013, 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.