DC1297B: 3.3V or 5V @ 5A (or 12V @ 5A), 5 ~ 36V in

Summary

Demonstration circuit DC1297B features the LTM®4612EV, an EN55022 Class B certified synchronous step-down power module. The board accepts an input voltage from 5V to 36V and delivers a jumper programmable output voltage of 3.3V, 5V or 12V. The rated load current is 5A for 3.3V/5V, 3A for 12V VOUT. Current derating is necessary for certain VIN, VOUT, and thermal conditions.

DC1297B supports programming of the output ramp-up and rampdown through the TRACK/SS pin. The output may be set to coincidentally or ratiometrically track to another voltage rail. The LTM4612 data sheet must be read in conjunction with this demo manual for working on or modifying the demo circuit 1297B.

Specifications

Manufacturer	Analog Devices Inc.
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	DC1297B-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	3 A (12V in) 5 A
Voltage In	5 ~ 36 V
Efficiency @ Conditions	>90%, 12V in, 5V @ 0.5 ~ 4.5 A >89%, 24V in, 12V @ 0.5 ~ 5 A >87%, 12V in, 3.3V @ 0.5 ~ 4.5 A >86%, 24V in, 5V @ 0.6 ~ 5 A >85%, 36V in, 12V @ 1.5 ~ 5 A >84%, 24V in, 3.3V @ 1.5 ~ 5 A >82%, 36V in, 5V @ 1.5 ~ 5 A >80%, 36V in, 3.3V @ 1.5 ~ 5 A
Voltage Out Range	3.3 ~ 15 V
Features	Internal Inductor Power Good Output Shutdown, Enable, Standby Voltage Tracking
Switching Frequency	235 kHz 350 kHz 850 kHz
Standby Current [Typical]	50 µA
Quiescent Current [Typical]	48 mA
Component Count + Extras	16 + 39
Internal Switch	Yes
Design Author	Linear Technology
Application / Target Market	Avionic RF / Wireless Telecom
Standby Current [Maximum]
Quiescent Current [Maximum]
Main I.C. Base Part	LTM4612B
Date Created By Author	2009-07
Date Added To Library	2012-04