DC1083A-A: 0.6 ~ 5V @ 6A, 4.5 ~ 20V in

Summary

Demonstration circuit DC1083A-A features the LTM®4603, the high efficiency, high density step-down μModule® regulator. The input voltage range is from 4.5V to 20V. The output voltage is jumper programmable from 0.6V to 5V.

The rated load current is 6A, while derating is necessary for certain VIN, VOUT, and thermal conditions. Applying an external clock signal to the PLLIN pin forces the μModule regulator to operate at the same frequency.

The output ramp-up and ramp-down may be programmed through the TRACK/SS pin. Margining function is provided for the user who wants to stress their system by varying supply voltages during testing.

The LTM4603 data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC1083A-A.

Specifications

Manufacturer	Analog Devices Inc.
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	DC1083A-A-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	0.6 V 1.2 V 1.5 V 1.8 V 2.5 V 3.3 V 5 V
Current Out	6 A
Voltage In	4.5 ~ 20 V
Efficiency @ Conditions	>90%, 12V in, 5V @ 1.5 ~ 6 A >85%, 20V in, 5V @ 2 ~ 6 A >85%, 12V in, 3.3V @ 1.2 ~ 6 A >80%, 20V in, 3.3V @ 1.7 ~ 6 A >80%, 12V in, 1.5V @ 2 ~ 6 A >70%, 20V in, 1.5V @ 2 ~ 6 A
Voltage Out Range	0.6 ~ 5 V
Features	Internal Inductor Over Voltage Protection Remote Sensing Shutdown, Enable, Standby Soft Start Under Voltage Protection, Brown-Out Voltage Tracking
Switching Frequency	1 MHz
Standby Current [Typical]	22 µA
Quiescent Current [Typical]	25 mA
Component Count + Extras	11 + 50
Internal Switch	Yes
Design Author	Linear Technology
Application / Target Market	Point of Load (PoL) Servers Telecom
Standby Current [Maximum]
Quiescent Current [Maximum]	43 mA
Main I.C. Base Part	LTM4603
Date Created By Author	2007-01
Date Added To Library	2012-03