EV3418-J-00A 400mA, 1.2MHz Sychronous Boost Converter Evaluation Board DESCRIPTION FEATURES The EV3418-J-00A Evaluation Board is designed to demonstrate the capabilities of MPS’ MP3418. With an input from 1.2V through 4V it can accommodate typical 0.1A continuous current to load. The MP3418 is a high-efficiency, synchronous, current–mode, step-up converter with output disconnect. MP3418 can start up from an input voltage as low as 0.8V to provide a output voltage from 1.8V through 4V. It also integrates inrush current limiting, output short-circuit protection, DOWN mode operation, OTP and other necessary functions for excellent performances. The 1.2MHz switching frequency allows for smaller external components to achieve low cost. MP3418 can be available in SOT23-8 package. ELECTRICAL SPECIFICATION Parameter Symbol Value Units Supply Voltage VIN 0.8 – 4 V Output Voltage VOUT 3.3 V Up to 96% Efficiency 0.8V Low Voltage Start-Up, 0.6V-to-4V Input Range 1.8V-to-4V Output Range Internal Synchronous Rectifier Typical 38μA Quiescent Current Typical 0.1μA Shutdown Current True Output Disconnect from Input VIN>VOUT Down Mode Operation High Efficiency under Light-Load Conditions Very Small External Components Inrush Current Limiting and Internal SoftStart OVP, SCP, OTP TSOT23-8 Package APPLICATIONS Battery powered products Personal Medical devices Portable Media Players Wireless Peripherals Handheld Computers and Smartphones All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Products, Quality Assurance page. “MPS” and “The Future of Analog IC Technology”, are Registered Trademarks of Monolithic Power Systems, Inc. EV3418-J-00A EVALUATION BOARD (L × W × H) 6.35cm × 6.35cm × 1.0cm Board Number MPS IC Number EV3418-J-00A MP3418GJ EV3418-J-00A Rev.1.1 www.MonolithicPower.com 4/16/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 1 EV3418-J-00A―400MA, 1.2MHZ SYNCHRONOUS BOOST CONVERTER EVB EVALUATION BOARD SCHEMATIC EV3418-J-00A BILL OF MATERIALS Qty RefDes Value Description 1 2 1 1 1 C1A, C2A C1B,C2B R1 R2 R3 10μF 0.1μF 365k 210k 100k 1 L1 6.8μH 1 U1 Ceramic Cap., 16V, X7R Ceramic Cap., 16V, X7R Film Res., 1% Film Res., 1% Film Res., 1% 80mOhm DCR, 1.25A Isat Step-Up Converter Package Manufacturer 1210 0603 0603 0603 0603 muRata muRata Yageo Yageo Yageo Manufactuer_P/N SMD Wurth 744043006 SOT23-8 MPS MP3418GJ GRM32DR71C106KA01L GRM188R71C104KA01D RC0603FR-07365KL RC0603FR-07210KL RC0603FR-07100KL EV3418-J-00A Rev.1.1 www.MonolithicPower.com 4/16/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 2 EV3418-J-00A―400MA, 1.2MHZ SYNCHRONOUS BOOST CONVERTER EVB EVB TEST RESULTS Performance waveforms are tested on the evaluation board. VIN = 2.4V, VOUT = 3.3V, L = 6.8µH, COUT=10uF, TA = 25°C, unless otherwise noted. EV3418-J-00A Rev.1.1 www.MonolithicPower.com 4/16/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 3 EV3418-J-00A―400MA, 1.2MHZ SYNCHRONOUS BOOST CONVERTER EVB EVB TEST RESULTS (continued) Performance waveforms are tested on the evaluation board. VIN = 2.4V, VOUT = 3.3V, L = 6.8µH, COUT=10uF, TA = 25°C, unless otherwise noted. EV3418-J-00A Rev.1.1 www.MonolithicPower.com 4/16/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 4 EV3418-J-00A―400MA, 1.2MHZ SYNCHRONOUS BOOST CONVERTER EVB PRINTED CIRCUIT BOARD LAYOUT Figure 1: Top Silkscreen Layer Figure 2: Top Layer Figure 3: Bottom Layer EV3418-J-00A Rev.1.1 www.MonolithicPower.com 4/16/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 5 EV3418-J-00A―400MA, 1.2MHZ SYNCHRONOUS BOOST CONVERTER EVB QUICK START GUIDE The output voltage of this board is set to 3.3V. The board layout accommodates most commonly used inductors and output capacitors. To use this EVB for evaluation, you can do as below: 1. Preset Power Supply to 0.8V VIN 4V. 2. Turn Power Supply off. 3. Preset Load to a value, note that over load will lead to SCP or insufficient output voltage. 4. Connect Power Supply terminals to: a. Positive (+): VIN b. Negative (–): GND 5. Connect Load to: a. Positive (+): VOUT b. Negative (–): GND 6. Turn Power Supply on after making connections. The MP3418 will automatically startup to work. 7. The output voltage VOUT can be programmed by changing R2. And the value of R2 can be calculated by the following formula: R2 R1 VFB VOUT VFB Where VFB 1.21V and R1=365kΩ. 8. If EN functions is preferred, apply a high level ( VEN 0.7V ) turns on MP3418, low level ( VEN 0.1V ) turns off MP3418. after turns off, output voltage will be discharged to 0 due to load. NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. EV3418-J-00A Rev.1.1 www.MonolithicPower.com 4/16/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 6