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

Summary

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.

Specifications

Manufacturer	Analog Devices Inc.
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	505-DC1743A-ND
Eval Board Supplier	Analog Devices Inc.
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 Synchronizable 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 Telecom
Standby Current [Maximum]	- Not Given
Quiescent Current [Maximum]	- Not Given
Main I.C. Base Part	LTM4613
Date Created By Author	2011-02
Date Added To Library	2013-01