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LP38856

SNVS336F – JUNE 2006 – REVISED AUGUST 2015

LP38856 3-A Fast-Response High-Accuracy LDO Linear Regulator With Enable

1 Features

3 Description

The

LP38856

is

a

high-current,

fast-response

1

•

Input Voltage: 1.1 V to 5.5 V

regulator

which

can

maintain

output

voltage

•

regulation with an extremely low input-to-output

•

voltage drop. Fabricated on a CMOS process, the

•

Stable with 10-µF Ceramic Capacitors

provides power for the internal bias and control

•

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

circuits, as well as drive for the gate of the N-MOS

Current

•

Precision Output Voltage Across All Line and

The use of an external bias rail allows the part to

Load Conditions:

regulators,

the

CMOS

architecture

consumes

–

extremely low quiescent current at any output load

–

±2% for 0°C

current. The use of an N-MOS power transistor

–

±3% for –40°C

results in wide bandwidth, yet minimum external

capacitance is required to maintain loop stability.

•

Overtemperature and Overcurrent Protection

•

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

The fast transient response of this device makes it

suitable for use in powering DSP, microcontroller core

voltages, and switch mode power supply post

2 Applications

regulators. The LP38856 is available in 5-pin TO-220

•

ASIC Power Supplies In:

and DDPAK/TO-263 packages.

–

Desktops, Notebooks, and Graphics Cards,

•

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

Servers

current.

–

Gaming Set Top Boxes, Printers and Copiers

•

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

load current.

•

Server Core and I/O Supplies

•

•

DSP and FPGA Power Supplies

pin is low.

•

SMPS Post-Regulator

•

±2% for 0°C

load conditions.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

DDPAK/TO-263 (5)

10.16 mm × 8.42 mm

LP38856

TO-220 (5)

14.986 mm × 10.16 mm

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

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.