LMR14003/6

5V, 0.3/0.6A

CB

SW

FB

Cboot L1

D1

R1

R2

Cout

SHDN

VIN

Up to 40V

Cin

VIN

GND

Fixed 5V Output

Option Available

LMR14003, LMR14006

www.ti.com

SNVSA10 – NOVEMBER 2013

SIMPLE SWITCHER® 40V 300/600mA Buck Regulators with High Efficiency Sleep Mode

Check for Samples: LMR14003, LMR14006

1

FEATURES

DESCRIPTION

•

Ultra Low 28µA Standby Current in Sleep

The LMR14003 and LMR14006 are PWM DC/DC

Mode

buck (step-down) regulators. With a wide input range

•

Input Voltage Range 4V to 40V

of 4V-40V, they are suitable for a wide range of

•

1µA Shutdown Current

application from industrial to automotive for power

conditioning

from

an

unregulated

source.

The

•

High Duty Cycle Operation Supported

regulator’s standby current is 28µA in sleep mode,

•

Output Current Options of 300mA and 600mA

which is suitable for battery operating systems. An

•

5V Fixed Voltage Option Available

ultra low 1µA current can further prolong battery life

in shutdown mode. Operating frequency is fixed at

•

1.1MHz and 2.1MHz Switching Frequency

1.1MHz(X version) and 2.1MHz(Y version) allowing

•

Internal Compensation

the use of small external components while still being

•

High Voltage Enable Input

able to have low output ripple voltage. Soft-start and

compensation circuits are implemented internally, and

•

Internal Soft Start

these allow the device to be used with minimized

•

Over Current Protection

external components. The LMR14006 is optimized for

•

Over Temperature Protection

up to 600mA load currents while the LMR14003 is

•

Small Overall Solution Size (TSOT-6L Package)

optimized for up to 300mA load current. They all have

a 0.765V typical feedback voltage. The device has

built-in protection features such as pulse by pulse

APPLICATIONS

current limit, thermal sensing and shutdown due to

•

Industrial Distributed Power Systems

excessive power dissipation. The LMR14003 and

•

Automotive

LMR14006 are available in a low profile TSOT-6L

package.

•

Battery Powered Equipment

•

Portable Handheld Instruments

•

Portable Media Players

Figure 1. Typical Application Schematic

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.

PRODUCTION DATA information is current as of publication date.

Copyright © 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.