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Analog Devices LTM4626 Demo Manual
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Analog Devices LTM4626 Demo Manual

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DESCRIPTION
Demonstration circuit 2665B-A features the
µModule
regulator, a high performance, high efficiency
®
step-down regulator. The LTM4626 is a complete DC/DC
point-of-load regulator in a thermally enhanced 6.25mm
× 6.25mm × 3.87mm BGA package. The LTM4626 has an
operating input voltage range of 3.1V to 20V and provides
an output current up to 12A. The output voltage is pro-
grammable from 0.6V to 5.5V and can be remotely sensed.
The stacked inductor design improves thermal dissipation
and significantly reduces the package area. Output volt-
age tracking is available through the TRACK/ SS pin for
BOARD PHOTO
LTM
4626
®
Part marking is either ink mark or laser mark
DEMO MANUAL DC2665B-A
20V
IN
µModule Regulator
supply rail sequencing. External clock synchronization
is available through the SYNC/MODE pin. For high effi-
ciency at low load currents, select discontinuous current
mode (DCM) operation using the MODE jumper (JP7) in
less noise sensitive applications. Refer to the LTM4626
data sheet in conjunction with this demo manual for
working on or modifying the DC2665B-A.
Design files for this circuit board are available.
All registered trademarks and trademarks are the property of their respective owners.
LTM4626
, 12A Step-Down
Rev. 0
1

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Summary of Contents for Analog Devices LTM4626

  • Page 1 6.25mm mode (DCM) operation using the MODE jumper (JP7) in × 6.25mm × 3.87mm BGA package. The LTM4626 has an less noise sensitive applications. Refer to the LTM4626 operating input voltage range of 3.1V to 20V and provides data sheet in conjunction with this demo manual for an output current up to 12A.
  • Page 2 DEMO MANUAL DC2665B-A 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 3.37 Jumper Selection on JP5...
  • Page 3 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). Refer to the LTM4626 data sheet for a detailed calculation of R (R5). fSET fSET Table 1.
  • Page 4 DEMO MANUAL DC2665B-A QUICK START PROCEDURE LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) dc2665ba F02a dc2665ba F02b dc2665ba F02c , 600kHz 1.8V , 600kHz , 600kHz 1.8V , 800kHz , 600kHz 2.5V , 1.5MHz 1.2V , 600kHz 2.5V , 600kHz...
  • Page 5 DEMO MANUAL DC2665B-A QUICK START PROCEDURE 50mV/DIV LOAD 2A/DIV dc2665ba F04a 40 s/DIV = 42mV OUT(PK-PK) (a) 1V 50mV/DIV LOAD 2A/DIV dc2665ba F04b 40 s/DIV = 52mV OUT(PK-PK) (b) 5V Figure 4. Load Transient (6A to 9A) Response Waveform at 12V Rev.

  • Page 6: Parts List

    DEMO MANUAL DC2665B-A QUICK START PROCEDURE 10mV/DIV 10mV/DIV dc2665ba F05a dc2665ba F05b 1 s/DIV 1 s/DIV = 27.6mV = 4.8mV OUT(PK-PK) OUT(PK-PK) (a) 1V , 600kHz, Full Bandwidth (500MHz) (b) 1V , 600kHz, 20MHz Bandwidth 10mV/DIV 10mV/DIV dc2665ba F05d dc2665ba F05c 1 s/DIV 1 s/DIV = 5.6mV...
  • Page 7 XSTR, MOSFET, N-CH, 40V, TO-252 (DPAK) VISHAY, SUD50N04-8M8P-4GE3 RES., SENSE, 0.005Ω, 1%, 1W, 2512 VISHAY, WSL25125L000FEA IC, 20V, 12A STEP-DOWN μModule REG. ANALOG DEVICES, INC. LTM4626EY#PBF Additional Demo Board Circuit Components C4, C9, C15, C36, C19, C43, C44 CAP ., OPTION, 0603...

  • Page 8: Schematic Diagram

    DEMO MANUAL DC2665B-A 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.