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LM2736

SNVS316H – SEPTEMBER 2004 – REVISED DECEMBER 2014

LM2736 Thin SOT 750 mA Load Step-Down DC-DC Regulator

1 Features

3 Description

The LM2736 regulator is a monolithic, high frequency,

1

•

Thin SOT-6 Package

PWM step-down DC/DC converter in a 6-pin Thin

•

3.0 V to 18 V Input Voltage Range

SOT package. It provides all the active functions to

•

1.25 V to 16 V Output Voltage Range

provide local DC/DC conversion with fast transient

response and accurate regulation in the smallest

•

750 mA Output Current

possible PCB area.

•

550 kHz (LM2736Y) and 1.6 MHz (LM2736X)

Switching Frequencies

With a minimum of external components and online

design support through WEBENCH®, the LM2736 is

•

350 m

Ω NMOS Switch

easy to use. The ability to drive 750 mA loads with an

•

30 nA Shutdown Current

internal 350 m

Ω NMOS switch using state-of-the-art

•

1.25 V, 2% Internal Voltage Reference

0.5 µm BiCMOS technology results in the best power

density available. The world class control circuitry

•

Internal Soft-Start

allows for on-times as low as 13 ns, thus supporting

•

Current-Mode, PWM Operation

exceptionally high frequency conversion over the

•

WEBENCH® Online Design Tool

entire 3 V to 18 V input operating range down to the

minimum

output

voltage

of

1.25

V.

Switching

•

Thermal Shutdown

frequency is internally set to 550 kHz (LM2736Y) or

1.6 MHz (LM2736X), allowing the use of extremely

2 Applications

small surface mount inductors and chip capacitors.

•

Local Point of Load Regulation

Even though the operating frequencies are very high,

•

Core Power in HDDs

efficiencies up to 90% are easy to achieve. External

shutdown is included, featuring an ultra-low stand-by

•

Set-Top Boxes

current of 30 nA. The LM2736 utilizes current-mode

•

Battery Powered Devices

control and internal compensation to provide high-

•

USB Powered Devices

performance

regulation

over

a

wide

range

of

operating

conditions.

Additional

features

include

•

DSL Modems

internal soft-start circuitry to reduce inrush current,

•

Notebook Computers

pulse-by-pulse current limit, thermal shutdown, and

output over-voltage protection.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

LM2736

SOT (6)

2.90 mm x 1.60 mm

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

the end of the datasheet.

Typical Application Circuit

Efficiency vs. Load Current "X"

VIN = 5 V, VOUT = 3.3 V

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.