ADP5301-EVALZ

ADP5301-EVALZ User Guide UG-853 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 ADP5301 Ultralow Power, Step-Down Regulator The ADP5301-EVALZ 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. GENERAL DESCRIPTION The ADP5301 is an ultralow power, synchronous, step-down dc-to-dc regulator with a load switch in a 9-ball WLFCSP package. The ADP5301 runs from input voltages of 2.15 V to 6.50 V and requires minimal external components to provide a high efficiency solution with integrated power switch, synchronous rectifier, and internal compensation. Complete information about the ADP5301 is available in the ADP5301 data sheet, which should be consulted in conjunction with this user guide when using the evaluation board. 13294-001 ADP5301-EVALZ EVALUATION BOARD PHOTOGRAPH Figure 1. PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 8 UG-853 ADP5301-EVALZ User Guide TABLE OF CONTENTS General Description ......................................................................... 1 Measuring Evaluation Board Performance ................................4 ADP5301-EVALZ Evaluation Board Photograph ........................ 1 Evaluation Board Schematic ............................................................5 Revision History ............................................................................... 2 Evaluation Board Layout ..................................................................6 Setting Up the Evaluation Board .................................................... 3 Ordering Information .......................................................................7 Powering Up the Evaluation Board............................................ 3 Bill of Materials ..............................................................................7 REVISION HISTORY 6/15—Revision 0: Initial Version Rev. 0 | Page 2 of 8 ADP5301-EVALZ User Guide UG-853 SETTING UP THE EVALUATION BOARD POWERING UP THE EVALUATION BOARD Output Load Connection The ADP5301-EVALZ evaluation board 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 ADP5301-EVALZ evaluation board, make sure that 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 1. Table 1 describes the jumper settings. Before selecting the jumper settings, make sure that the enable input, EN, is high. 2. Table 1. Jumper Settings Jumper J5 (EN) J8 (VID) J6 (SYNC/MODE) J7 (VOUTOK) 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 PWM mode Hysteresis mode Set frequency from 1.2 MHz to 2.5 MHz Pull VOUTOK to VIN Pull VOUTOK to VOUT Input Power Source Connection Before connecting the power source to the ADP5301-EVALZ evaluation board, make sure that 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. Connect the positive load connection (+) to the VOUT terminal (J2). Connect the negative load connection (−) to the GND terminal (J4). 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. Make sure that the voltmeters are connected 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 due to the connections between the board, the power source, and/or the load. 1. 2. 3. Connect the positive terminal (+) of the input voltage measuring voltmeter to Test Point TP1 on the evaluation board. Connect the negative terminal (−) of the input voltage measuring voltmeter to Test Point TP4 on the board. Connect the positive terminal (+) of the output voltage measuring voltmeter to Test Point TP3 on the board. Connect the negative terminal (−) of the output voltage measuring voltmeter to Test Point TP6 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: 4. 1. Power On the Evaluation Board 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. When the power source and load are connected to the ADP5301-EVALZ evaluation board, the board can be powered 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 8 UG-853 ADP5301-EVALZ User Guide Measuring Output Voltage Ripple 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 should alternate between 0 V and the approximate input voltage. Measuring Load Regulation Test the 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. The input voltage can be measured between TP1 and TP4. The output voltage is measured between TP3 and TP6. To observe the output voltage ripple, place an oscilloscope probe across the C2 output capacitor, 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. 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 can be measured. Measuring Efficiency The efficiency, η, is measured by comparing the input power with the output power. η  VOUT  I OUT V IN  I IN Measuring Inductor Current 13294-002 The inductor current can be measured by removing one end of the inductor from the pad on the board and using a wire connected between the pad and the inductor. A current probe can then be used to measure the inductor current. Figure 2. Output Ripple Measurement Output Voltage Change The output voltage of the evaluation board is preset to 1.8 V. However, the output voltage can be adjusted with external VID resistor (see Table 5 in the ADP5301 data sheet). Rev. 0 | Page 4 of 8 ADP5301-EVALZ User Guide UG-853 EVALUATION BOARD SCHEMATIC TP1 PVIN_SNS 1 2 1 J1 VIN U1 SY NC/MODE B3 C3 VID C2 SY NC/MODE PGND VID AGND FB VINOK A1 SW 2 L1 2.2uH TP3 VOUT_SNS J2 1 VO VOUT B2 C1 R1 20k TP5 VOUTOK VIN_OK GND R2 1M C2 C3 TP6 GND_SNS J4 1 J5 EN R3 0Ohm 1 2 3 1 1 2 3 1 2 GND TP7 GND J6 SY NC 2 1 B1 NC 1 SW TP2 SW A2 10uF/ 10V 2 1 10uF/ 10V TP4 GND_SNS J3 ADP5301 PVIN 1 C1 EN 1 A3 EN 1 VIN VIN J7 VOUTOK 1 2 3 J8 VID 13294-003 1 2 3 Figure 3. Schematic of the ADP5301-EVALZ Evaluation Board Rev. 0 | Page 5 of 8 UG-853 ADP5301-EVALZ User Guide 13294-004 EVALUATION BOARD LAYOUT 13294-005 Figure 4. Top Layer Figure 5. Second Layer Rev. 0 | Page 6 of 8 ADP5301-EVALZ User Guide UG-853 ORDERING INFORMATION BILL OF MATERIALS Table 2. 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 TP4 TP7 U1 Description 10 µF/10 V No connect VIN VOUT GND EN SYNC VOUTOK VID 2.2 µH 2.2 µH 20 kΩ 1 MΩ 0Ω PVIN_SNS SW VOUT_SNS GND_SNS VOUTOK GND IC Part Number GRM31CR71A106KA01 Not applicable M20-9990245 M20-9990245 M20-9990245 M20-9990246 M20-9990246 M20-9990246 M20-9990246 LPS3015-222MR 74438334022 CRCW060320K0FKEA CRCW06031M00FKEA CRCW0603100K0FKEA M20-9990245 M20-9990245 M20-9990245 M20-9990245 M20-9990245 M20-9990245 ADP5301ACBZ-2-R7 Rev. 0 | Page 7 of 8 PCB Footprint C1206 C1206 SIP2 SIP2 SIP2 SIP3 SIP3 SIP3 SIP3 Inductor45x32 Inductor45x32 R0603 R0603 R0603 SIP1 SIP1 SIP1 SIP1 SIP1 SIP1 WLFCSP9 Vendor 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 UG-853 ADP5301-EVALZ User Guide NOTES 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. UG13294-0-6/15(0) Rev. 0 | Page 8 of 8