ADP5303-EVALZ

ADP5303-EVALZ User Guide UG-881 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 Evaluating the ADP5303 Ultralow Step-Down Regulator FEATURES GENERAL DESCRIPTION Ultralow quiescent current Input voltage monitoring Few external components and compact solution size The ADP5303 is an ultralow power, synchronous step-down dc-to-dc regulator in a 9-lead WLCSP package. The ADP5303 runs from input voltages of 2.06 V to 6.5 V and requires minimal external components to provide a high efficiency solution with an integrated power switch, synchronous rectifier, and internal compensation. EQUIPMENT NEEDED ADP5303 evaluation board Power supply Electronic load Multimeter The ADP5303 evaluation board provides an easy way to evaluate the device. This user guide describes how to quickly set up the board to collect performance data. DOCUMENTS NEEDED Complete information about the ADP5303 is available in the ADP5303 data sheet, which should be consulted in conjunction with this user guide when using the evaluation board. ADP5303 data sheet ADP5303-EVALZ user guide 13508-001 THE ADP5303 EVALUATION BOARD Figure 1. PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 7 UG-881 ADP5303-EVALZ User Guide TABLE OF CONTENTS Features .............................................................................................. 1  Powering Up the Evaluation Board ............................................3  Equipment Needed ........................................................................... 1  Measuring Evaluation Board Performance .................................4  Documents Needed .......................................................................... 1  Evaluation Board Schematic and Artwork.....................................5  General Description ......................................................................... 1  Ordering Information .......................................................................7  The ADP5303 Evaluation Board..................................................... 1  Bill of Materials ..............................................................................7  Revision History ............................................................................... 2  Setting Up the Evaluation Board .................................................... 3  REVISION HISTORY 11/15—Revision 0: Initial Version Rev. 0 | Page 2 of 7 ADP5303-EVALZ User Guide UG-881 SETTING UP THE EVALUATION BOARD POWERING UP THE EVALUATION BOARD Output Load Connection The ADP5303 evaluation board arrives is fully assembled and tested. Before applying power to the evaluation board, follow the setup procedures in this section. Before connecting the load to the ADP5303 evaluation board, ensure the board is turned off. If the load includes a current meter or if the current is not measured, connect the load directly to the evaluation board as follows: Jumper Settings Table 1 describes the jumper settings. Before selecting the jumper settings, make sure that the enable input, EN, is high. 1. 2. Table 1. Jumper Settings Jumper J5 (EN) J8 (VID) J6 (SYNC/MODE) J7 (VINOK) State or Connection High Low VIN GND Floating VIN GND External frequency VIN VOUT Function Enable VOUT Disable VOUT 2.5 V 3V Program VOUT by external resistor FPWM mode Hysteresis mode Set frequency from 1.2 MHz to 2.5 MHz Pull VINOK to VIN Pull VINOK to VOUT Input Power Source Connection Before connecting a power source to the ADP5303 evaluation board, ensure the board is turned off. If the input power source includes a current meter, use the meter to monitor the input current as follows: 1. 2. Connect the positive terminal of the power source to the VIN terminal (J1) on the evaluation board. Connect the negative terminal of the power source to the GND terminal (J3) on the board. If the power source does not include a current meter, connect a current meter in series with the input source voltage as follows: 1. 2. 3. Connect the positive terminal of the power source to the positive terminal of the current meter. Connect the negative terminal of the power source to the GND terminal (J3) on the evaluation board. Connect the negative terminal of the current meter to the VIN terminal (J1) on the evaluation board. Connect the positive load connection to the VOUT terminal (J2) on the evaluation board. Connect the negative load connection to the GND terminal (J4) on the evaluation board. If a current meter is used, connect it in series with the load as follows: 1. 2. 3. Connect the positive terminal of the current meter to the VOUT terminal (J2) on the evaluation board. Connect the negative terminal of the current meter to the positive terminal of the load. Connect the negative terminal of the load to the GND terminal (J4) on the evaluation board. Input and Output Voltmeter Connections Measure the input and output voltages with voltmeters. Ensure the voltmeters connect to the appropriate test points on the board. If the voltmeters are not connected to the correct test point, the measured voltages may be incorrect due to the voltage drop across the leads or the connections between the board, the power source, and/or the load. 1. 2. 3. 4. Connect the positive terminal of the voltmeter measuring the input voltage to the TP1 test point on the evaluation board. Connect the negative terminal of the voltmeter measuring the input voltage to the TP4 test point on the evaluation board. Connect the positive terminal of the voltmeter measuring the input voltage to the TP3 test point on the evaluation board. Connect the negative terminal of the voltmeter measuring the input voltage to the TP6 test point on the evaluation board. Power On the Evaluation Board When the power source and load connect to the ADP5303 evaluation board, the board can power on. If the input power source exceeds 2.06 V (typical), the output voltage rises to 1.8 V by default. Rev. 0 | Page 3 of 7 UG-881 ADP5303-EVALZ User Guide MEASURING EVALUATION BOARD PERFORMANCE Measuring the Switching Waveform To observe the switching waveform with an oscilloscope, place the oscilloscope probe tip at the TP2 and TP4 test points with the probe ground connected to GND. Set the oscilloscope to a dc coupling, 2 V/division, 1 µs/division time base. The switching waveform must alternate between 0 V and the approximate input voltage. A standard oscilloscope probe has a long wire ground clip. For high frequency measurements, this ground clip picks up high frequency noise and injects it into the measured output ripple. Figure 2 shows a simple way to properly measure the output ripple. It requires removing the oscilloscope probe sheath and wrapping a nonshielded wire around the oscilloscope probe. By keeping the ground lengths of the oscilloscope probe as short as possible, true ripple is measureable. Measuring Load Regulation Test load regulation by increasing the load at the output and measuring the output voltage between the TP4 and TP7 test points. Measuring Line Regulation Vary the input voltage and measure the output voltage at a fixed output current. Measure the input voltage between the TP1 and TP4 test points. Measure the output voltage between the TP3 and TP6 test points. η = 13508-002 Measuring Efficiency The efficiency, η, is measured by comparing the input power with the output power. VOUT × I OUT V IN × I IN Figure 2. Output Ripple Measurement Measuring Inductor Current Measure the inductor current by removing one end of the inductor from the pad on the board and using a wire connected between the pad and the inductor. Use a current probe to measure the inductor current through the wire. Measuring Output Voltage Ripple Output Voltage Change The output voltage of the evaluation board is preset to 1.8 V. However, the output voltage can be adjusted with an external RVID resistor through the VID pin to GND (see Table 5 in the ADP5303 data sheet). To observe the output voltage ripple, place an oscilloscope probe across the C2 and C3 output capacitors with the probe ground lead placed at the negative capacitor terminal and the probe tip placed at the positive capacitor terminal. Set the oscilloscope to an ac coupling, 10 mV/division, 2 µs/division time base and 20 MHz bandwidth. Rev. 0 | Page 4 of 7 ADP5303-EVALZ User Guide UG-881 EVALUATION BOARD SCHEMATIC AND ARTWORK VIN U1 VIN C2 SYNC/MODE PGND VID AGND FB VINOK A1 SW 2 L1 2.2uH TP3 VOUT_SNS 1 VO VOUT B2 C1 R1 19.6k TP5 VINOK GND VIN_OK C2 C3 TP6 GND_SNS R3 0Ohm 1 2 3 GND TP7 GND J6 SYNC 1 2 3 J7 VINOK VIN 1 2 3 13508-003 1 2 3 Figure 3. Schematic of the ADP5303 Evaluation Board 13508-004 J8 VID J4 1 2 1 R2 1M 1 J5 EN J2 2 1 B1 NC 1 B3 C3 VID SW TP2 SW A2 10uF/10V 2 1 TP4 GND_SNS 10uF/10V J3 SYNC/MODE ADP5303 PVIN 1 C1 EN 1 A3 EN 1 1 2 1 TP1 PVIN_SNS J1 Figure 4. Top Layer of the ADP5303 Evaluation Board Rev. 0 | Page 5 of 7 ADP5303-EVALZ User Guide 13508-005 UG-881 Figure 5. Second Layer of the ADP5303 Evaluation Board Rev. 0 | Page 6 of 7 ADP5303-EVALZ User Guide UG-881 ORDERING INFORMATION BILL OF MATERIALS Table 2. ADP5303 Evaluation Board Bill of Materials Qty 2 1 1 1 2 1 1 1 1 1 Reference Designator C1, C2 C3 J1 J2 J3, J4 J5 J6 J7 J8 L1 1 1 1 1 1 1 2 1 1 1 R1 R2 R3 TP1 TP2 TP3 TP4, TP6 TP5 TP7 U1 Description 10 μF/10 V Not connected VIN VOUT GND EN SYNC VINOK VID, jumper 2.2 μH 2.2 μH 19.6 kΩ 1 MΩ 0Ω PVIN_SNS SW VOUT_SNS GND_SNS VINOK GND IC, ultralow power buck regulator Part Number GRM31CR71A106KA01 Not applicable M20-9990245 M20-9990245 M20-9990245 M20-9990246 M20-9990246 M20-9990246 M20-9990246 LPS3015-222MR 74438334022 CRCW060319K6FKEA CRCW06031M00FKEA CRCW0603100K0FKEA M20-9990245 M20-9990245 M20-9990245 M20-9990245 M20-9990245 M20-9990245 ADP5303ACBZ-2-R7 Printed Circuit Board Footprint C1206 C1206 SIP2 SIP2 SIP2 SIP3 SIP3 SIP3 SIP3 Inductor 45x32 Inductor 45x32 R0603 R0603 R0603 SIP1 SIP1 SIP1 SIP1 SIP1 SIP1 WLCSP9 Manufacturer Murata Not applicable Harwin Harwin Harwin Harwin Harwin Harwin Harwin Coilcraft Wurth Elektronik Vishay Dale Vishay Dale Vishay Dale Harwin Harwin Harwin Harwin Harwin Harwin Analog Devices, Inc. ESD Caution ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality. Legal Terms and Conditions By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation 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. Customer understands and agrees that the Evaluation Board is provided for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted is expressly made subject to the following additional limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board; and (ii) permit any Third Party to access the Evaluation Board. As used herein, the term “Third Party” includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is NOT sold to Customer; all rights not expressly granted herein, including ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all be considered the confidential and proprietary information of ADI. Customer may not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of use of the Evaluation Board or termination of this Agreement, Customer agrees to promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited to soldering or any other activity that affects the material content of the Evaluation Board. Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS” AND ADI MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF THE EVALUATION BOARD, INCLUDING BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE AMOUNT OF ONE HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable United States federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of Massachusetts (excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby submits to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed. ©2015 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. UG13508-0-11/15(0) Rev. 0 | Page 7 of 7