DC1400A: 0.6 ~ 3.3V @ 8A, 2.5 ~ 5.5V in

Summary

Demonstration circuit DC1400A features the LTM®4608AEV, the high efficiency, high density switch mode step-down power module. The input voltage range is 2.5V to 5.5V. The output voltage is jumper selectable from 0.6V to 3.3V. The rated load current is 8A although derating is necessary for certain VIN, VOUT and thermal conditions.

LTM4608A offers a novel phase-shift clock output to support current sharing with other regulators. The TRACK/SS pin allows the user to program output voltage ramp-up and rampdown slew rate. The same pin also allows the output to coincidentally or ratiometrically track another voltage rail. The margining function is provided for users who wish to stress their systems by varying supply voltages during testing.

The LTM4608A data sheet must be read in conjunction with this demo manual prior to working on or modifying the DC1400A.

Specifications

Manufacturer	Analog Devices Inc.
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	DC1400A-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
Current Out	8 A
Voltage In	2.5 ~ 5.5 V
Efficiency @ Conditions	>86%, 3.3V in, 1.5V @ 0.1 ~ 4 A >83%, 3.3V in, 1.2V @ 0.1 ~ 4 A >80%, 5V in, 1.2V @ 1.2 ~ 5 A >79%, 5V in, 1.5V @ 0.1 ~ 7 A
Voltage Out Range	0.6 ~ 3.3 V
Features	Frequency Jitter for EMI Internal Inductor Light Load Mode Over Current Protection Over Voltage Protection Power Good Output Short Circuit Protection Shutdown, Enable, Standby Synchronizable Thermal Protection Under Voltage Protection, Brown-Out Voltage Tracking
Switching Frequency	1.5 MHz 2 MHz
Standby Current [Typical]	450 µA
Quiescent Current [Typical]	75 mA
Component Count + Extras	9 + 43
Internal Switch	Yes
Design Author	Linear Technology
Application / Target Market	Point of Load (PoL) Telecom
Standby Current [Maximum]
Quiescent Current [Maximum]
Main I.C. Base Part	LTM4608A
Date Created By Author	2004-02
Date Added To Library	2011-03