Evaluation Board User Guide UG-188 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 ADP2119/ADP2120 Step-Down Regulator GENERAL DESCRIPTION The ADP2119/ADP2120 are synchronous, step-down, dc-to-dc regulators in a compact 3 mm × 3 mm LFCSP_WD package. should be consulted in conjunction with this user guide when using the evaluation boards. The ADP2119/ADP2120 evaluation boards provide an easy way to evaluate the device. This user guide describes how to quickly set up the board to collect performance data. Full details on the ADP2119/ADP2120 are available in the ADP2119/ADP2120 data sheet, which is available from Analog Devices, Inc., and The ADP2119/ADP2120 run from input voltages of 2.3 V to 5.5 V and require minimal external components to provide a high efficiency solution with integrated power switch, synchronous rectifier, and internal compensation. 09314-001 09314-002 ADP2119/ADP2120 EVALUATION BOARDS Figure 1. ADP2119 Evaluation Board PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Figure 2. ADP2120 Evaluation Board Rev. 0 | Page 1 of 8 UG-188 Evaluation Board User Guide TABLE OF CONTENTS General Description ......................................................................... 1 Typical Performance Characteristics ..............................................5 ADP2119/ADP2120 Evaluation Boards ........................................ 1 Evaluation Board Schematics and Artwork...................................6 Revision History ............................................................................... 2 Evaluation Board Layout ..................................................................7 Setting Up the Evaluation Board .................................................... 3 Ordering Information.......................................................................8 Powering up the Evaluation Board ............................................ 3 Bill of Materials..............................................................................8 Measuring Evaluation Board Performance............................... 3 REVISION HISTORY 9/10—Revision 0: Initial Version Rev. 0 | Page 2 of 8 Evaluation Board User Guide UG-188 SETTING UP THE EVALUATION BOARD POWERING UP THE EVALUATION BOARD The ADP2119/ADP2120 evaluation boards are fully assembled and tested. Before applying power to the evaluation boards, follow the setup procedures in this section. Connect the positive (+) terminal of the input voltage measuring voltmeter to Test Point T2 and the negative (−) terminal to Test Point T1. Jumper Settings Refer to Table 1 for selecting the jumper positions. Before selecting the jumper positions, make sure that the enable input, EN, is high. Table 1. Jumper Settings Jumper J3 (EN) J5 (SYNC/MODE) J7 (TRK) States High Low High Low External clock High External voltage points on the board. If the voltmeters are not connected to the right test point, the measured voltages may be incorrect due to the voltage drop across the leads and/or connections between the boards, the power source, and/or load. Connect the positive (+) terminal of the output voltage measuring voltmeter to Test Point T4 and the negative (−) terminal to Test Point T5. Power On the Evaluation Board Function Enable VOUT Disable VOUT Force PWM (FPWM) Enable PFM Synchronize to the external clock When the power source and load are connected to the ADP2119/ ADP2120 evaluation board, it can be powered up for operation. If the input power source is above 2.3 V, the output voltage rises to 1.2 V as the default setting. Tracking function not used Tracking with the external voltage Measuring the Switching Waveform Input Power Source Connection Before connecting the power source to the ADP2119/ADP2120 evaluation boards, make sure that they are turned off. If the input power source includes a current meter, use that meter to monitor the input current. MEASURING EVALUATION BOARD PERFORMANCE To observe the switching waveform with an oscilloscope, place the oscilloscope probe tip at Test Point T6 with the probe ground connected to GND. Set the oscilloscope to a dc coupling, 2 V/division, and 1 μs/division time base. The switching waveform should alternate between 0 V and approximately the input voltage. Connect the positive terminal of the power source to the VIN terminal (J1) on the evaluation boards, and the negative terminal of the power source to the GND terminal (J2) of the board. If the power source does not include a current meter, connect a current meter in series with the input source voltage. Measuring Load Regulation Connect the positive terminal of the power source to the ammeter positive terminal (+), the negative terminal of the power source to the GND terminal (J2) on the evaluation board, and the negative terminal (−) of the ammeter to the VIN terminal (J1) on the board. Vary the input voltage and measure the output voltage at a fixed output current. Input voltage can be measured between T2 and T1. The output voltage is measured between T4 and T5. Output Load Connection Make sure that the board is turned off before connecting the load. If the load includes an ammeter, or if the current is not measured, connect the load directly to the evaluation board with the positive (+) load connection to the VOUT terminal (J4) and negative (−) load connection to the GND terminal (J6). If an ammeter is used, connect it in series with the load; connect the positive (+) ammeter terminal to the evaluation board VOUT terminal (J4), the negative (−) ammeter terminal to the positive (+) load terminal, and the negative (−) load terminal to the evaluation board GND terminal (J6). Input and Output Voltmeter Connections Measure the input and output voltages with voltmeters. Make sure that the voltmeters are connected to the appropriate test Load regulation should be tested by increasing the load at the output and measuring the output voltage between the T4 and T5 test points. Measuring Line Regulation 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 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. Then, a current probe can be used to measure the inductor current. Measuring Output Voltage Ripple To observe the output voltage ripple, place an oscilloscope probe across the output capacitor (C4) with the probe ground lead placed at the negative (−) capacitor terminal and the probe tip placed at the positive (+) capacitor terminal. Set the oscillo- Rev. 0 | Page 3 of 8 UG-188 Evaluation Board User Guide scope 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 3 shows an easy way to measure the output ripple properly. 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. Output Voltage Change VOUT 09314-003 The ADP2119/ADP2120 evaluation board output is preset to 1.2 V; however, the output voltage can be adjusted using the following equation: Figure 3. Output Ripple Measurement R4 + R3 ⎞ = 0.6 V × ⎛⎜ ⎟ ⎝ R4 ⎠ Rev. 0 | Page 4 of 8 Evaluation Board User Guide UG-188 TYPICAL PERFORMANCE CHARACTERISTICS 100 VOUT (AC) 90 1 80 60 SW 2 50 VOUT = 1.0V VOUT = 1.2V VOUT = 1.5V VOUT = 1.8V VOUT = 2.5V VOUT = 3.3V 30 20 10 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 IL 4 1.8 2.0 OUTPUT CURRENT (A) CH1 20.0mV 09314-004 40 Figure 4. ADP2119 Efficiency, VIN = 5 V, FPWM B W CH2 5.00V M4.00µs A CH4 CH4 500mA Ω T –40.0000ns 820mA 09314-007 EFFICIENCY (%) 70 Figure 7. PFM Mode (ADP2120) 100 EN 90 80 3 VOUT EFFICIENCY (%) 70 60 1 50 PGOOD VOUT = 1.0V VOUT = 1.2V VOUT = 1.5V VOUT = 1.8V VOUT = 2.5V 30 20 2 IL 4 10 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 OUTPUT CURRENT (A) M400µs CH1 500mV BW CH2 5.00V CH3 5.00V CH4 2.00A Ω T 30.40% 09314-005 0 A CH3 3.60V 09314-008 40 Figure 8. Soft Start (ADP2119, VIN = 5 V, VOUT = 1.2 V) Figure 5. ADP2119 Efficiency, VIN = 3.3 V, FPWM VOUT (AC) 1 1 VOUT (AC) SW IO 2 IL CH1 5.00mV B W CH2 5.00V M1.00µs A CH2 CH4 1.00A Ω T –40.0000ns 4.30V CH1 50.0mV Figure 6. Continuous Conduction Mode (ADP2120) B W CH4 1.00A Ω M200µs A CH3 T 596.000µs 880mA 09314-009 4 09314-006 4 Figure 9. Load Transient (ADP2119, FPWM, VIN = 5 V, VOUT = 1.2 V) Rev. 0 | Page 5 of 8 UG-188 Evaluation Board User Guide EVALUATION BOARD SCHEMATICS AND ARTWORK T1 GND 1 J2 1 1 R1 10Ω 2 1 C1 0.1µF C2 22µF/6.3V 2 1 1 GND 2 J4 VOUT J6 GND 1 2 2 3 1 L1 1.5µH C3 C4 22µF 6.3V 22µF 6.3V 4 5 R2 10kΩ U1 ADP2119 VIN EN PVIN SYNC/MODE SW PGOOD PGND GND TRK EPAD J1 VIN T3 PGOOD T2 VIN FB 10 9 3 2 1 J3 EN 3 2 1 J5 SYNC/MODE 3 2 1 J7 TRK 1 T7 GND 8 7 6 11 1 2 R4 10kΩ R3 10kΩ 1 C5 OPTIONAL 1 T4 VOUT T5 GND T1 GND T2 VIN 09314-010 1 T6 SW Figure 10. ADP2119 Evaluation Board Schematic 1 J2 GND 2 1 1 R1 10Ω C1 0.1µF C2 22µF/6.3V 1 2 J4 VOUT J6 GND R2 10kΩ U1 ADP2120 1 2 2 C3 C4 10µF 6.3V 22µF 6.3V 3 1 L1 1.5µH 4 5 VIN EN PVIN SYNC/MODE SW PGOOD PGND GND TRK FB 3 2 1 10 9 J3 EN 8 7 3 2 1 6 J5 SYNC/MODE 11 1 2 R3 10kΩ 1 T4 VOUT 1 T5 GND 1 C5 OPTIONAL T6 SW Figure 11. ADP2120 Evaluation Board Schematic Rev. 0 | Page 6 of 8 R4 10kΩ 3 2 1 1 J7 TRK T7 GND 09314-011 2 1 1 EPAD J1 VIN T3 PGOOD Evaluation Board User Guide UG-188 09314-012 EVALUATION BOARD LAYOUT 09314-014 Figure 12. Top Layer 09314-013 Figure 13. Bottom Layer Figure 14. Silkscreen Top Rev. 0 | Page 7 of 8 UG-188 Evaluation Board User Guide ORDERING INFORMATION BILL OF MATERIALS Table 2. ADP2119 Evaluation Board Bill of Materials Qty 1 3 1 1 1 3 1 7 4 3 Part Reference C1 C2, C3, C4 C5 L1 R1 R2, R3, R4 U1 T1,T2, T3, T4, T5, T6, T7 J1, J2, J4, J6 J3, J5, J7 Type Capacitor Capacitor Capacitor Inductor Resistor Resistor IC Test point Connector Jumper Description 0.1 μF, 50 V 22 μF, 6.3 V, X5R Optional 1.5 μH 10 Ω 10 kΩ, 1% 2 A buck regulator SIP1 SIP2 SIP3 PCB Footprint C0603 C1206 C0603 Sumida_CDRH5D18 R0603 R0603 10-lead LFCSP_WD SIP1 SIP2 SIP3 Vendor Murata Murata Murata Sumida Vishay Dale Vishay Dale Analog Devices Harwin Harwin Harwin Part Number GRM188F51H104ZA01 GRM31CR60J226KE19 Optional CDRH5D18BHPNP-1R5M CRCW060310R0FKEA CRCW060310K0JKTA ADP2119ACPZ-R7 M20-9990245 M20-9990245 M20-9990346 PCB Footprint C0603 C1206 C1206 C0603 Sumida_CDRH5D18 R0603 R0603 10-lead LFCSP_WD SIP1 SIP2 SIP3 Vendor Murata Murata Murata Murata Sumida Vishay Dale Vishay Dale Analog Devices Harwin Harwin Harwin Part Number GRM188F51H104ZA01 GRM31CR60J226KE19 GRM319R60J106KE19 Optional CDRH5D18BHPNP-1R5M CRCW060310R0FKEA CRCW060310K0JKTA ADP2120ACPZ-R7 M20-9990245 M20-9990245 M20-9990346 Table 3. ADP2120 Evaluation Board Bill of Materials Qty 1 2 1 1 1 1 3 1 7 4 3 Part Reference C1 C2, C4 C3 C5 L1 R1 R2, R3, R4 U1 T1,T2, T3, T4, T5, T6, T7 J1, J2, J4, J6 J3, J5, J7 Type Capacitor Capacitor Capacitor Capacitor Inductor Resistor Resistor IC Test point Connector Jumper Description 0.1 μF, 50 V 22 μF, 6.3 V, X5R 10 μF, 6.3 V, X5R Optional 1.5 μH 10 Ω 10 kΩ, 1% 1.25 A buck regulator SIP1 SIP2 SIP3 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. ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. UG09314-0-9/10(0) Rev. 0 | Page 8 of 8