LMR14003 Datasheet, PDF (1/20 Pages) Texas Instruments – SIMPLE SWITCHER 40V 300/600mA Buck Regulators with High Efficiency Sleep Mode

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
FEATURES
1
• Ultra Low 28µA Standby Current in Sleep
Mode
• Input Voltage Range 4V to 40V
• 1µA Shutdown Current
• High Duty Cycle Operation Supported
• Output Current Options of 300mA and 600mA
• 5V Fixed Voltage Option Available
• 1.1MHz and 2.1MHz Switching Frequency
• Internal Compensation
• High Voltage Enable Input
• Internal Soft Start
• Over Current Protection
• Over Temperature Protection
• Small Overall Solution Size (TSOT-6L Package)
APPLICATIONS
• Industrial Distributed Power Systems
• Automotive
• Battery Powered Equipment
• Portable Handheld Instruments
• Portable Media Players
DESCRIPTION
The LMR14003 and LMR14006 are PWM DC/DC
buck (step-down) regulators. With a wide input range
of 4V-40V, they are suitable for a wide range of
application from industrial to automotive for power
conditioning from an unregulated source. The
regulator’s standby current is 28µA in sleep mode,
which is suitable for battery operating systems. An
ultra low 1µA current can further prolong battery life
in shutdown mode. Operating frequency is fixed at
1.1MHz(X version) and 2.1MHz(Y version) allowing
the use of small external components while still being
able to have low output ripple voltage. Soft-start and
compensation circuits are implemented internally, and
these allow the device to be used with minimized
external components. The LMR14006 is optimized for
up to 600mA load currents while the LMR14003 is
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
current limit, thermal sensing and shutdown due to
excessive power dissipation. The LMR14003 and
LMR14006 are available in a low profile TSOT-6L
package.
VIN
Up to 40V
Cin
VIN
SHDN
GND
LMR14003/6
CB
Cboot _L1
SW
5V, 0.3/0.6A
D1
R1
Cout
FB
Fixed 5V Output
Option Available
R2
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated