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LP38859

SNVS337F – JUNE 2006 – REVISED SEPTEMBER 2015

LP38859 3-A Fast-Response High-Accuracy LDO Linear Regulator With Soft Start

1 Features

3 Description

The

LP38859

is

a

high-current,

fast-response

1

•

Input Voltage: 1.1 V to 5.5 V

regulator

which

can

maintain

output

voltage

•

regulation with extremely low input to output voltage

•

drop. Fabricated on a CMOS process, the device

•

Stable With 10-µF Ceramic Capacitors

voltage to drive the gate of the N-MOS power

•

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

Current

supplies power to the load. The use of an external

•

Programmable Soft-Start Time

voltages.

Unlike

bipolar

regulators,

the

CMOS

•

Precision Output Voltage Across All Line and

architecture

consumes

extremely

low

quiescent

Load Conditions:

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

loop stability.

–

•

Overtemperature and Overcurrent Protection

The fast transient response of this device makes it

suitable for use in powering DSP microcontroller core

•

Operating Temperature Range:

−40°C to +125°C

voltages

and

switch-mode

power-supply

post-

regulators. The LP38859 is available in 5-pin TO-220

2 Applications

and DDPAK/TO-263 packages.

•

ASIC Power Supplies In:

Device Information(1)

–

Desktops, Notebooks, Graphics Cards, and

PART

Servers

PACKAGE

BODY SIZE (NOM)

NUMBER

–

Gaming Set Top Boxes, Printers, and Copiers

DDPAK/TO-263 (5)

10.16 mm × 8.42 mm

LP38859

•

Server Core and I/O Supplies

TO-220 (5)

14.986 mm × 10.16 mm

•

DSP and FPGA Power Supplies

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

•

SMPS Post-Regulator

the end of the data sheet.

Typical Application Circuit

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.