ADP5300-EVALZ

ADP5300-EVALZ Evaluation Board User Guide UG-879 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 ADP5300 50 mA/500 mA, High Efficiency, Ultralow Power Step-Down Regulator GENERAL DESCRIPTION The ADP5300-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. The ADP5300 is an ultralow power, synchronous step-down dc-to-dc regulator with a load switch in a 10-lead LFCSP package. The ADP5300 runs from an input voltage range of 2.15 V to 6.50 V and requires minimal external components to provide a high efficiency solution with an integrated power switch, a synchronous rectifier, and internal compensation. Complete information about the ADP5300 is available in the ADP5300 data sheet, which should be consulted in conjunction with this user guide when using the evaluation board. 13305-001 ADP5300-EVALZ 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-879 ADP5300-EVALZ Evaluation Board User Guide TABLE OF CONTENTS General Description ......................................................................... 1 Measuring Evaluation Board Performance .................................4 ADP5300-EVALZ Evaluation Board.............................................. 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 9/15—Revision 0: Initial Version Rev. 0 | Page 2 of 7 ADP5300-EVALZ Evaluation Board User Guide UG-879 SETTING UP THE EVALUATION BOARD POWERING UP THE EVALUATION BOARD Output Load Connection The ADP5300-EVALZ evaluation board is fully assembled and tested. Before applying power to the ADP5300-EVALZ evaluation board, follow the setup procedures in this section. Before connecting the load to the ADP5300-EVALZ, ensure that the evaluation board is turned off. If the load includes a current meter, or if the current is not measured, connect the load directly to the ADP5300-EVALZ 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 (VOUT_OK) 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 VOUT_OK to VIN Pull VOUT_OK to VOUT Input Power Source Connection Before connecting the power source to the ADP5300-EVALZ, ensure that the evaluation 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). 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 ADP5300-EVALZ. 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 ADP5300-EVALZ. 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. 4. Connect the positive terminal (+) of the input voltage measuring voltmeter to Test Point TP1 on the ADP5300EVALZ. Connect the negative terminal (−) of the input voltage measuring voltmeter to Test Point TP5 on the ADP5300EVALZ. Connect the positive terminal (+) of the output voltage measuring voltmeter to Test Point TP4 on the ADP5300EVALZ. Connect the negative terminal (−) of the output voltage measuring voltmeter to Test Point TP7 on the ADP5300EVALZ. Power on the ADP5300-EVALZ When the power source and load are connected to the ADP5300-EVALZ, the evaluation 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 7 UG-879 ADP5300-EVALZ Evaluation Board User Guide MEASURING EVALUATION BOARD PERFORMANCE Measuring the Switching Waveform To observe the switching waveform with an oscilloscope, place the oscilloscope probe tip at TP2, and ensure that the probe ground is connected to GND at TP5. 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 how to measure the output ripple. Measuring the output ripple requires removing the oscilloscope probe sheath and wrapping an unshielded wire around the oscilloscope probe. By keeping the ground lengths of the oscilloscope probe as short as possible, true ripple can be measured. 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 TP1 and TP5. The output voltage is measured between TP4 and TP7. Measuring Efficiency Measure the efficiency, η, by comparing the input power with the output power. VOUT × I OUT V IN × I IN 13305-002 η = Measuring Inductor Current Measure the inductor current by removing one end of the inductor from the pad on the ADP5300-EVALZ and using a wire connected between the pad and the inductor. Then, use a current probe to measure the inductor current. Measuring Output Voltage Ripple 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 an external VID resistor (see the ADP5300 data sheet). 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 a 20 MHz bandwidth. Rev. 0 | Page 4 of 7 ADP5300-EVALZ Evaluation Board User Guide UG-879 EVALUATION BOARD SCHEMATIC TP1 VIN_SNS 1 2 VIN 1 J1 U1 3 VID 4 FB 5 SW SYNC/MODE PGND VID AGND FB VOUTOK 9 SW L1 2.2µH TP4 VOUT_SNS 1 VOUT VOUT 7 6 TP6 VOUTOK GND C3 VOUT_OK C4 TP7 GND_SNS J4 1 2 1 R2 1MΩ J5 EN R3 0Ω 1 2 3 1 GND TP9 GND 1 TP8 GND J6 SYNC J2 2 1 8 EXP R1 19.6kΩ 2 1 SYNC/MODE ADP5300 STOP TP2 SW 10 1 2 PVIN NC 1 STOP 1 EN 10µF/10V 2 1 C2 10µF/10V TP5 GND_SNS J3 NC C1 1 11 TP3 STOP EN 1 VIN 1 2 3 VIN J7 VOUT_OK 1 2 3 J8 VID 13305-003 1 2 3 Figure 3. ADP5300-EVALZ Evaluation Board Schematic Rev. 0 | Page 5 of 7 UG-879 ADP5300-EVALZ Evaluation Board User Guide 13305-004 EVALUATION BOARD LAYOUT 13305-005 Figure 4. ADP5300-EVALZ Top Layer Figure 5. ADP5300-EVALZ Second Layer Rev. 0 | Page 6 of 7 ADP5300-EVALZ Evaluation Board User Guide UG-879 ORDERING INFORMATION BILL OF MATERIALS Table 2. Quantity 2 2 1 1 2 1 1 1 1 1 Reference Designator C1, C4 C2, C3 J1 J2 J3, J4 J5 J6 J7 J8 L1 1 1 1 1 1 1 1 2 1 2 1 R1 R2 R3 TP1 TP2 TP3 TP4 TP5, TP7 TP6 TP8, TP9 U1 Description No connect 10 µF/10 V VIN VOUT GND EN SYNC VOUT_OK VID 2.2 µH 2.2 µH 19.6 kΩ 1 MΩ 0Ω VIN_SNS SW STOP VOUT_SNS GND_SNS VOUT_OK GND IC Part Number Not applicable GRM31CR71A106KA01 M20-9990245 M20-9990245 M20-9990245 M20-9990246 M20-9990246 M20-9990246 M20-9990246 LPS3015-222MR 74438334022 CRCW060319K6FKEA CRCW06031M00FKEA CRCW06030000FKEA M20-9990245 M20-9990245 M20-9990245 M20-9990245 M20-9990245 M20-9990245 M20-9990245 ADP5300ACPZ-1-R7 PCB Footprint C1206 C1206 SIP2 SIP2 SIP2 SIP3 SIP3 SIP3 SIP3 Inductor 45 × 32 Inductor 45 × 32 R0603 R0603 R0603 SIP1 SIP1 SIP1 SIP1 SIP1 SIP1 SIP1 QFN10_3x3 Vendor Not applicable Murata Harwin Harwin Harwin Harwin Harwin Harwin Harwin Coilcraft Wurth Elektronik Vishay Dale Vishay Dale Vishay Dale Harwin 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. UG13505-0-9/15(0) Rev. 0 | Page 7 of 7