LMR14203XMKDEMO: 1.2V @ 300mA, 4.5 ~ 42V in


The Texas Instruments LMR14203/06 is a PWM DC/DC buck (step-down) regulator. With a wide input range from 4.5 V-42 V, it is suitable for a variety of applications from automotive to power conditioning of unregulated sources.

The LMR14203/LMR14006 demonstration board is designed to provide the design engineer with a fully functional power converter based on the buck topology to evaluate the LMR14203/06 series of buck regulators. The demonstration board comes populated with either the LMR14203XMK or LMR14206XMK, but can easily be modified to accommodate any of the LMR14203/06 regulator ICs.


Manufacturer Texas Instruments
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number LMR14203XMKDEMO/NOPB-ND
Eval Board Supplier Texas Instruments
Eval Board Normally In Stock
Topology Step Down
Outputs and Type 1 Non-Isolated
Output Voltage: Factory Set 1.2 V
Current Out 300 mA
Voltage In 4.5 ~ 42 V
Efficiency @ Conditions >60%, 12 Vin, 1.2 V @ 90 ~ 300 mA
>51%, 24 Vin, 1.2V @ 100 ~ 300 mA
Voltage Out Range 0.765 ~ 34 V
Features Current Limit (Adj. or Fixed)
Short Circuit Protection
Shutdown, Enable, Standby
Soft Start
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency 1.25 MHz
Standby Current [Typical] 16 µA
Quiescent Current [Typical] 1.35 mA
Component Count + Extras 11 + 5
Internal Switch Yes
Design Author Texas Instruments
Application / Target Market Industrial Power
Point of Load (PoL)
Portable Devices
Standby Current [Maximum] 40 µA
Main I.C. Base Part LMR14203
Quiescent Current [Maximum] 1.85 mA

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