ADP2387-EVALZ

ADP2387-EVALZ User Guide UG-786 One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com Evaluation Board for the ADP2387 20 V, 6 A Synchronous, Step-Down, DC-to-DC Regulator FEATURES GENERAL DESCRIPTION Input voltage: 4.5 V to 20 V ±1% output voltage accuracy Integrated MOSFET: 44 mΩ typical/11 mΩ typical Continuous output current: 6 A Programmable current-limit threshold Programmable switching frequency: 200 kHz to 1.4 MHz Precision enable and power good External compensation Internal soft start with external adjustable option Startup into a precharged output The ADP2387-EVALZ evaluation board is a complete 6 A, 20 V, step-down regulator solution that allows users to evaluate the performance of the ADP2387 with a near ideal printed circuit board (PCB) layout. The programmable current-limit function allows the inductor to be optimized by output current. The peak current-limit threshold is preset to 9 A to ensure the 6 A output current capability. The switching frequency can be programmed between 200 kHz and 1.4 MHz, which provides the possibility for a stackable multiphase power solution. The output of the ADP2387-EVALZ evaluation board is preset to 3.3 V, and the switching frequency is set to 600 kHz. Different output voltage settings can be achieved by changing the appropriate passive components. The ambient temperature operating range is −40°C to +85°C. Full details on the ADP2387 regulator are provided in the ADP2387 data sheet, available from Analog Devices, Inc., which should be consulted in conjunction with this user guide when working with this evaluation board. 12862-006 EVALUATION BOARD PHOTOGRAPH Figure 1. PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. A | Page 1 of 8 UG-786 ADP2387-EVALZ User Guide TABLE OF CONTENTS Features .............................................................................................. 1  Modifying the Board.....................................................................4  General Description ......................................................................... 1  Evaluation Board Schematic and Artwork.....................................5  Evaluation Board Photograph......................................................... 1  Schematic........................................................................................5  Revision History ............................................................................... 2  PCB Layout ....................................................................................6  Using the Evaluation Board............................................................. 3  Ordering Information .......................................................................7  Powering Up .................................................................................. 3  Bill of Materials ..............................................................................7  Measuring Evaluation Board Performance .................................. 3  REVISION HISTORY 1/16—Revision A: Initial Version Rev. A | Page 2 of 8 ADP2387-EVALZ User Guide UG-786 USING THE EVALUATION BOARD POWERING UP Turning On the Evaluation Board The ADP2387-EVALZ evaluation board is supplied fully assembled and tested. Before applying power to the evaluation board, follow the procedures in this section. When the power source and load are connected to the evaluation board, it can be powered for operation. Jumper J5 (Enable) 1. 2. 3. Perform the following steps to turn on the board: Use one of the following methods to enable or to disable the regulator:   To enable the regulator, short the middle pin of J5, EN, to high. To disable the regulator, short the middle pin of J5, EN, to GND. Ensure that the power source voltage is >4.5 V and