DC2152A: 3.3V @ 18A & 5V @ 8A, 6 ~ 15 Vin, Buck

Summary

Demonstration circuit 2152A features the LTM®4630AEV, the high efficiency, high density, dual 18A, switch mode step-down power module regulator. The input voltage is from 6V to 15V. The output voltage is programmable from 0.6V to 5.3V. DC2152A can deliver up to 18A maximum in each channel. ±3% transient accuracy can be achieved with 25% load step.

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® in less noise sensitive applications.

Two outputs can be connected in parallel for a single 36A 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 ratio-metrically 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 LTM4630AEV in a compact 16mm × 16mm × 4.41mm LGA package make it ideal for use in many high-density point-of-load regulation applications. The LTM4630A data sheet must be read in conjunction with this demo manual for working on or modifying the demo circuit DC2152A.

Specifications

Manufacturer Analog Devices Inc.
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Multi Output
Eval Board Part Number DC2152A-ND
Eval Board Supplier Analog Devices Inc.
Eval Board Normally In Stock
Topology Step Down
Outputs and Type 2 Non-Isolated
Voltage Out: Highest Current First 3.3V, 5V
Current Out 18A per Channel
Voltage In 6 ~ 15 V
Efficiency @ Conditions >95%, 12V in, 5V @ 4.8 ~ 18 A
>93%, 12V in, 3.3V @ 4.5 ~ 18 A
Voltage Out Range 0.6 ~ 5.3 V
Features Current Foldback Protection
Current Limit (Adj. or Fixed)
Current Sharing
Over Current Protection
Over Voltage Protection
Soft Start
Voltage Tracking
Switching Frequency 450 ~ 550 kHz
Standby Current [Typical] 35 µA
Quiescent Current [Typical] 65 mA
Component Count + Extras 43 + 42
Internal Switch Yes
Design Author Linear Technology
Application / Target Market Memory Back-up
Networking
Power: Industrial Power
Telecom
Standby Current [Maximum] - Not Given
Quiescent Current [Maximum] - Not Given
Main I.C. Base Part LTM4630A
Date Created By Author 2014-10
Date Added To Library 2017-01

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