ADP2386-EVALZ

Evaluation Board User Guide UG-466 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 ADP2384/ADP2386, 20 V, 4 A/6 A Synchronous Step-Down DC-to-DC Regulators FEATURES GENERAL DESCRIPTION Input voltage: 4.5 V to 20 V ±1% output voltage accuracy Integrated MOSFET 44 mΩ/11 mΩ Continuous output current 4 A for ADP2384 6 A for ADP2386 Programmable switching frequency: 200 kHz to 1.4 MHz Synchronizes to external clock: 200 kHz to 1.4 MHz 180° out-of-phase synchronization Precision enable and power good External compensation Internal soft start with external adjustable option Startup into precharged output The ADP2384/ADP2386 evaluation board is a complete, 4 A/6 A, 20 V, step-down regulator solution that allows users to evaluate the performance of the ADP2384/ADP2386 with a near ideal printed circuit board (PCB) layout. The switching frequency can be programmed between 200 kHz and 1.4 MHz, or it can be synchronized to an external clock with a 180° phase shift, which provides the possibility for a stackable multiphase power solution. The output of the ADP2384/ADP2386 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 appropriate passive components. The ambient temperature operating range is −40°C to +85°C. Full details on the ADP2384 and ADP2386 regulators are provided in the ADP2384 and ADP2386 data sheets, available from Analog Devices, Inc., which should be consulted in conjunction with this user guide. 10986-001 DEMO BOARD Figure 1. PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 12 UG-466 Evaluation Board User Guide TABLE OF CONTENTS Features .....................................................................................1 Evaluation Board Schematic and Artwork................................. 5 General Description ..................................................................1 ADP2384 Schematic .............................................................. 5 Demo Board ..............................................................................1 ADP2386 Schematic .............................................................. 6 Revision History ........................................................................2 PCB Layout............................................................................ 7 Using the Evaluation Board .......................................................3 Ordering Information ............................................................... 8 Powering Up ..........................................................................3 Bill of Materials...................................................................... 8 Measuring Evaluation Board Performance................................3 Modifying the Board..............................................................4 REVISION HISTORY 11/12—Revision 0: Initial Version Rev. 0 | Page 2 of 12 Evaluation Board User Guide UG-466 USING THE EVALUATION BOARD POWERING UP Turning On the Evaluation Board The ADP2384/ADP2386 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 J6 (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 J6, EN, to HIGH. To disable the regulator, short the middle pin of J6, EN, to GND. Ensure that the power source voltage is >4.5 V and