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DC1498A: 1.2V & 1.5V @ 13A (x2), 4.5 ~ 16V in

Summary

DC1498A features the LTM®4620EV, the high efficiency, high density, dual 13A, switch mode step-down power module regulator. The input voltage is from 4.5V to 16V. The output voltage is programmable from 0.6V to 2.5V. DC1498A can deliver nominal 12A output current and up to 13A maximum in each channel. As explained in the data sheet, output current derating is necessary for certain VIN, VOUT, and thermal conditions.

The board operates in continuous conduction mode in heavy load conditions. For high efficiency at low load currents, the MODE jumper (JP1) selects pulse-skipping mode for noise sensitive applications or Burst-Mode® operation in less noise sensitive applications. Two outputs can be connected in parallel for a single 26A output solution with optional jumper resistors. The board allows the user to program how its output ramps up and down through the TRACK/SS pin. The output can be set up to either coincidentally or ratiometrically track with another supply’s output.

Remote output voltage sensing is available for improved output voltage regulation at the load point. These features and the availability of the LTM4620EV in a compact 15mm × 15mm × 4.41mm LGA package make it ideal for use in many high-density point-of-load regulation applications. The LTM4620 data sheet must be read in conjunction with this demo manual prior to working on or modifying DC1498A.

Specifications

Manufacturer Linear Technology/Analog Devices
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Multi Output
Eval Board Part Number DC1498A-ND
Eval Board Supplier Linear Technology/Analog Devices
Eval Board Normally In Stock
Topology Step Down
Outputs and Type 2 Non-Isolated
Voltage Out: Highest Current First 1.2V, 1.5V
Current Out 13A per Channel
Voltage In 4.5 ~ 16 V
Efficiency @ Conditions >87%, 5V in, 1.5V @ 2.8 ~ 13 A
>86%, 9V in, 1.5V @ 4.5 ~ 13 A
>85%, 5V in, 1.2V @ 2 ~ 13 A
>85%, 12V in, 1.5V @ 6 ~ 13 A
>84%, 9V in, 1.2V @ 3.9 ~ 13 A
>84%, 15V in, 1.5V @ 7.5 ~ 13 A
>83%, 12V in, 1.2V @ 5 ~ 13 A
>82%, 15V in, 1.2V @ 6 ~ 13 A
Voltage Out Range 0.6 ~ 2.5 V
Features Current Foldback Protection
Current Limit (Adj. or Fixed)
Current Sharing
Over Current Protection
Over Voltage Protection
Power Good Output
Remote Sensing
Shutdown, Enable, Standby
Synchronizable
Thermal Protection
Voltage Tracking
Switching Frequency 600 kHz
Standby Current [Typical] 50 µA
Quiescent Current [Typical] 65 mA
Component Count + Extras 15 + 84
Internal Switch Yes
Design Author Linear Technology
Application / Target Market Industrial Power
Servers
Telecom
Standby Current [Maximum] - Not Given
Quiescent Current [Maximum] - Not Given
Main I.C. Base Part LTM4620
Date Created By Author 2012-03
Date Added To Library 2013-12

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