Analog Devices DC2665B-B Demo Manual
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Analog Devices DC2665B-B Demo Manual

Ltm4638 20vin, 15a step-down µmodule regulator
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DESCRIPTION
Demonstration circuit 2665B-B features the
µModule
regulator, a high performance, high effi-
®
ciency step-down regulator. The LTM4638 is a complete
DC/DC point-of-load regulator in a thermally enhanced
6.25mm × 6.25mm × 5.02mm BGA package. The
LTM4638 has an operating input voltage range of 3.1V to
20V and provides an output current up to 15A. The output
voltage is programmable from 0.6V to 5.5V and can be
remotely sensed. The stacked inductor design improves
thermal dissipation and significantly reduces the package
BOARD PHOTO
LTM
4638
®
Part marking is either ink mark or laser mark
DEMO MANUAL DC2665B-B
20V
IN
µModule Regulator
area. Output voltage tracking is available through the
TRACK/ SS pin for supply rail sequencing. External clock
synchronization is available through the SYNC/MODE pin.
For high efficiency at low load currents, select discon-
tinuous current mode (DCM) operation using the MODE
jumper (JP7) in less noise sensitive applications. Refer
to the LTM4638 data sheet in conjunction with this demo
manual for working on or modifying the DC2665B-B.
Design files for this circuit board are available.
All registered trademarks and trademarks are the property of their respective owners.
LTM4638
, 15A Step-Down
Rev. 0
1

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Summary of Contents for Analog Devices DC2665B-B

  • Page 1 LTM4638 data sheet in conjunction with this demo voltage is programmable from 0.6V to 5.5V and can be manual for working on or modifying the DC2665B-B. remotely sensed. The stacked inductor design improves Design files for this circuit board are available.

  • Page 2: Performance Summary

    DEMO MANUAL DC2665B-B PERFORMANCE SUMMARY Specifications are at T = 25°C PARAMETER CONDITIONS UNITS Input Voltage Range Output Voltage, V Jumper Selection on JP1 0.98 1.02 Jumper Selection on JP2 1.47 1.53 Jumper Selection on JP3 2.45 2.55 Jumper Selection on JP4 3.23...
  • Page 3 DEMO MANUAL DC2665B-B QUICK START PROCEDURE Figure 1. Test Setup of DC2665B-B NOTES: 1. To achieve the minimum output ripple voltage, optimize the operation frequency at different input and output volt- ages. Suggested operation frequencies at different voltages are shown in Table 1. Adjust the operation frequency by changing the value of R (R5).
  • Page 4 DEMO MANUAL DC2665B-B QUICK START PROCEDURE 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15...
  • Page 5 DEMO MANUAL DC2665B-B QUICK START PROCEDURE 50mV/DIV LOAD 2A/DIV dc2665bb F04a 50 s/DIV = 55mV OUT(PK-PK) (a) 1V 50mV/DIV LOAD 2A/DIV dc2665bb F04b 50 s/DIV = 66mV OUT(PK-PK) (b) 5V Figure 4. Load Transient (7.5A to 11.25A) Response Waveform at 12V...

  • Page 6: Parts List

    DEMO MANUAL DC2665B-B QUICK START PROCEDURE (20MHz BW) (FULL BW) 10mV/DIV 10mV/DIV dc2665bb F05b dc2665bb F05a 1 s/DIV 1 s/DIV = 5.6mV = 37mV OUT(PK-PK) OUT(PK-PK) (a) 1V , 600kHz, Full Bandwidth at 500MHz (b) 1V , 600kHz, 20MHz Bandwidth...
  • Page 7 DEMO MANUAL DC2665B-B PARTS LIST ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER RES., 10k, 1%, 1/10W, 0603 VISHAY, CRCW060310K0FKEAC RES., 90.9k, 0.5%, 1/10W, 0603 SUSUMU, RG1608P-9092-D-T5 RES., 40.2k, 0.5%, 1/10W, 0603 SUSUMU, RG1608P-4022-D-T5 RES., 13.3k, 0.5%, 1/10W, 0603 SUSUMU, RG1608P-1332-D-T5 RES., 19.1k, 0.5%, 1/10W, 0603 SUSUMU, RG1608P-1912-D-T5 RES., 8.25k, 0.5% 1/10W 0603...

  • Page 8: Schematic Diagram

    DEMO MANUAL DC2665B-B SCHEMATIC DIAGRAM Rev. 0...

  • Page 9: Revision History

    Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
  • Page 10 Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”) and Analog Devices, Inc. (“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal, temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY.

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