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LP38853

SNVS335E – DECEMBER 2006 – REVISED NOVEMBER 2015

LP38853 3-A Fast-Response High-Accuracy Adjustable LDO Linear Regulator With Enable

and Soft Start

1 Features

3 Description

The

LP38853

is

a

high-current,

fast-response

1

•

regulator that can maintain output voltage regulation

•

with extremely low input-to-output voltage drop.

•

Dropout Voltage of 240 mV (Typical) at 3-A Load

Fabricated on a CMOS process, the device operates

Current

•

the input voltage which supplies power to the load.

Conditions:

The use of an external bias rail allows the device to

–

–

regulators,

the

CMOS

architecture

consumes

extremely low quiescent current at any output load

–

current. The use of an NMOS power transistor results

•

Overtemperature and Overcurrent Protection

in wide bandwidth, yet minimum external capacitance

•

Stable with 10-µF Ceramic Capacitors

is required to maintain loop stability.

•

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

The fast transient response of this device makes it

Range

suitable for use in powering DSP and microcontroller

core voltages, and switch-mode power-supply post

2 Applications

regulators.

•

Dropout Voltage: 240 mV (typical) at 3-A load

•

ASIC Power Supplies in:

current.

–

Desktops, Notebooks, Graphics Cards, and

•

Low Ground Pin Current: 10 mA (typical) at 3-A

Servers

load current.

–

Gaming Set-Top Boxes, Printers, and Copiers

•

Soft Start: Programmable soft-start time.

•

Server Core and I/O Supplies

Device Information(1)

•

DSP and FPGA Power Supplies

PART

•

SMPS Post-Regulator

PACKAGE

BODY SIZE (NOM)

NUMBER

DDPAK/TO-263 (7)

10.10 mm × 8.89 mm

LP38853

TO-220 (7)

14.986 × 10.16 mm

SO PowerPAD™ (8)

4.89 mm × 3.90 mm

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

the end of the data sheet.

Simplified Schematic

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.