DC1743A: 3.3V, 5V, 12V @ 8A, 5 ~ 36V in


Demonstration circuit DC1743A features the LTM®4613EV, an EN55022 class B certified, high input and output voltage, high efficiency, switch mode step-down power µModule® regulator. The input voltage range is from 5V to 36V. The output voltage is jumper programmable from 3.3V to 12V with a rated load current of 8A.

Derating is necessary for certain VIN, VOUT, frequency and thermal conditions: please refer to LTM4613 data sheet for derating curves. Only input and output capacitors are needed externally. The DC1743A offers the TRACK/SS pin allowing the user to program output tracking or soft-start period. Output voltage margining can also be realized through jumper position selections.

Higher efficiency at low load currents is achieved by setting the MODE pin jumper to DCM. The PLL pin is available to synchronize the LTM4613EV to an external clock. The LTM4613 data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC1743A.


Manufacturer Linear Technology/Analog Devices
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number DC1743A-ND
Eval Board Supplier Linear Technology/Analog Devices
Eval Board Normally In Stock
Topology Step Down
Outputs and Type 1 Non-Isolated
Voltage Out: Factory Set 3.3 V
5 V
12 V
Current Out 8 A
Voltage In 5 ~ 36 V
Efficiency @ Conditions >94%, 24V in, 12V @ 4 ~ 8 A
>91%, 24V in, 5V @ 4 ~ 8 A
>88%, 24V in, 3.3V @ 4 ~ 8 A
Voltage Out Range 3.3 ~ 12 V
Features Current Foldback Protection
Internal Inductor
Noise Filtering, On-Chip
Over Voltage Protection
Shutdown, Enable, Standby
Soft Start
Under Voltage Protection, Brown-Out
Voltage Tracking
Switching Frequency 165 kHz
250 kHz
600 kHz
Standby Current [Typical] 50 µA
Quiescent Current [Typical] 60 mA
Component Count + Extras 23 + 31
Internal Switch Yes
Design Author Linear Technology
Application / Target Market RF / Wireless
Standby Current [Maximum] - Not Given
Quiescent Current [Maximum] - Not Given
Main I.C. Base Part LTM4613
Date Created By Author
Date Added To Library 2013-01

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