ADP198CP-EVALZ

Evaluation Board User Guide UG-230 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 ADP198 Evaluation Board User Guide FEATURES GENERAL DESCRIPTION Ultrasmall 1 mm × 1 mm, 4-ball, 0.5 mm pitch WLCSP Tiny 8-lead, 2 mm × 2 mm LFCSP Low RDSON of 50 mΩ at 3.3 V (WLCSP) Low input voltage range of 1.65 V to 6.5 V 1 A continuous operating current Operating temperature range: TJ = −40°C to +85°C The ADP198 evaluation boards are used to demonstrate the functionality of the ADP198 power switch. Simple device measurements such as VIN to VOUT resistance (RDSON), ground current, and off state current can be demonstrated with just a single voltage source, a voltmeter, an ammeter, and load resistors. Full details about the ADP198 power switch are available in the ADP198 data sheet, which should be consulted when using the ADP198 evaluation boards. Figure 2. ADP198 WLCSP Evaluation Board Figure 1. ADP198 LFCSP Evaluation Board PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. 09562-002 09562-001 EVALUATION BOARDS Rev. 0 | Page 1 of 10 UG-230 Evaluation Board User Guide TABLE OF CONTENTS Features .............................................................................................. 1  Ground Current Measurement........................................................6  General Description ......................................................................... 1  Ground Current Consumption ...................................................6  Evaluation Boards............................................................................. 1  Shutdown Current Measurement....................................................8  Revision History ............................................................................... 2  Ordering Information.................................................................... 10  Evaluation Board Schematic and Hardware ................................. 3  Bill of Materials........................................................................... 10  VIN to VOUT Resistance (RDSON) ................................................ 4  REVISION HISTORY 10/11—Revision 0: Initial Version Rev. 0 | Page 2 of 10 Evaluation Board User Guide UG-230 EVALUATION BOARD SCHEMATIC AND HARDWARE 1 1 TP1 VIN 1 WAY LINK 2 1 J1 C1 8 7 6 1 WAY LINK 2 1 J2 1 WAY LINK 2 1 J3 0.1µF 5 U1 VIN VOUT VIN VOUT EN GND SEL0 SEL1 1 2 3 4 VOUT 1 TP3 1 TP4 C2 0.1µF ADP198 LFCSP 09562-003 TP2 Figure 3. LFCSP Evaluation Board Schematic U1 TP1 1 A1 VIN B1 C1 0.1µF VIN EN VOUT GND A2 B2 ADP198-WLCSP VOUT 1 TP3 C2 0.1µF 1 TP4 1 WAY LINK 2 1 TP2 1 09562-004 J2 EN Figure 4. WLCSP Evaluation Board Schematic Table 1. Evaluation Board Hardware Components Component U1 C1 Function Power switch Input capacitor C2 Output capacitor J1 J2, J3 Jumper Start-up time selector Description ADP198 high-side power switch. 0.1 μF input bypass capacitor. Required for stability and transient performance. Connect C1 from VIN to GND. 0.1 μF output capacitor. Required for stability and transient performance. Connect C2 from VOUT to GND. Jumper. Connects EN to VIN for automatic startup. Jumper. Selects different start-up time options, LFCSP only. Rev. 0 | Page 3 of 10 UG-230 Evaluation Board User Guide VIN TO VOUT RESISTANCE (RDSON) 0.25 RDSON can be measured using the configuration shown in Figure 6 and Figure 7. RDSON is defined as the input-to-output voltage differential divided by load current. 10mA 100mA 200mA 400mA 800mA 1000mA 0.20 RDSON (Ω) The voltmeter reading divided by the load current value gives the equivalent RDSON value. For more accurate measurements, a second voltmeter can be used to monitor the input voltage across the input capacitor. The input supply voltage may need to be adjusted to account for IR drops, especially if large load currents are used. Figure 5 shows a typical curve of RDSON measurements with different load currents. 0.15 0.10 0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 VIN (V) Figure 5. RDSON vs. Input Voltage, WLCSP VOLTAGE SOURCE VOLTMETER 1.99711 + + – LOAD 09562-006 – Figure 6. LFCSP RDSON Measurement Rev. 0 | Page 4 of 10 6.0 6.5 09562-005 0.05 Evaluation Board User Guide UG-230 VOLTAGE SOURCE VOLTMETER 1.99711 + + – LOAD 09562-007 – Figure 7. WLCSP RDSON Measurement Rev. 0 | Page 5 of 10 UG-230 Evaluation Board User Guide GROUND CURRENT MEASUREMENT 1. 2. 3. 4. Connect the positive terminal (+) of the voltage source to the VIN pad on the evaluation board. Connect the positive terminal (+) of the ammeter to one of the GND pads of the evaluation board. Connect the negative terminal (−) of the ammeter to the negative (−) terminal of the voltage source. Connect a load between the VOUT pad of the evaluation board and the negative (−) terminal of the voltage source. Ground current measurement is a way of determining how much current the internal circuits of the regulator are consuming, while performing the power switch function. To be efficient, the power switch needs to consume as little current as possible. Figure 8 shows the typical ground current consumption for various load levels. 20 10mA 100mA 200mA 400mA 800mA 1000mA 18 16 14 12 10 8 6 4 2 0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 VIN (V) The voltage source can now be turned on. If J1 is inserted (connecting EN to VIN for automatic startup), the regulator powers up. Figure 8. Ground Current vs. Input Voltage AMMETER VOLTAGE SOURCE 0.00112 + – – + 09562-009 LOAD Figure 9. LFCSP Ground Current Measurement Rev. 0 | Page 6 of 10 6.0 6.5 09562-008 Follow these steps to connect to a voltage source and ammeter: GROUND CURRENT CONSUMPTION GROUND CURRENT (µA) Figure 9 and Figure 10 show how the evaluation board can be connected to a voltage source and an ammeter for ground current measurements. A resistor can be used as the load for the regulator. Ensure that the resistor has a power rating adequate to handle the power expected to be dissipated across it. An electronic load can be used as an alternative. Ensure that the voltage source used can supply enough current for the expected load levels. If voltmeters are connected at the input or output terminals, subtract the current resulting from the shunt resistance of the voltmeter for accurate ground current measurement. Evaluation Board User Guide UG-230 AMMETER VOLTAGE SOURCE 0.00112 + – – + 09562-010 LOAD Figure 10. WLCSP Ground Current Measurement Rev. 0 | Page 7 of 10 UG-230 Evaluation Board User Guide SHUTDOWN CURRENT MEASUREMENT Figure 12 and Figure 13 show how the evaluation board can be connected to a voltage source and an ammeter for shutdown current measurements. The ammeter can also be connected to the GND terminal to measure the ground current, which is equal to the shutdown current when EN is tied to ground. Figure 11 shows the typical shutdown current consumption for various input voltages. 100 1.65V 2.10V 2.50V 90 2. 3. Connect the positive terminal (+) of the voltage source to the (+) of the ammeter. Connect the negative (−) terminal of the voltage source to GND pad on the evaluation board. Connect the negative terminal (−) of the ammeter to the VIN pad on the evaluation board. Connect the EN pin to ground. The voltage source can now be turned on. 70 60 50 40 30 20 10 0 –40 –20 0 20 40 60 80 100 TEMPERATURE (°C) 09562-011 Figure 11. Shutdown Current vs. Temperature and Input Voltage VOLTAGE SOURCE AMMETER – + 0.00112 + – 09562-012 GROUND CURRENT (µA) 1. 4. 3.30V 3.80V 5.50V 6.50V 80 Follow these steps to connect to a voltage source and ammeter: Figure 12. LFCSP Shutdown Current Measurement Rev. 0 | Page 8 of 10 Evaluation Board User Guide UG-230 VOLTAGE SOURCE AMMETER + 0.00112 + – 09562-013 – Figure 13. WLCSP Shutdown Current Measurement Rev. 0 | Page 9 of 10 UG-230 Evaluation Board User Guide ORDERING INFORMATION BILL OF MATERIALS Table 2. Qty 2 1 1 Reference Designator C1, C2 J1 U1 Description Capacitor, MLCC, 0.1 μF, 10 V, 0402, X5R Header, single, STR, 2 pins IC, power switch Manufacturer/Vendor Murata or equivalent Digi-Key Corp. Analog Devices, Inc. Vendor Part No. GRM155R61A104KA01D S1012E-36-ND ADP198 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. 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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. ©2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. UG09562-0-10/11(0) Rev. 0 | Page 10 of 10