EV8867-LE-00A High Efficiency,8A,17V, Synchronous Step-Down Converter with I²C Interface The Future of Analog IC Technology DESCRIPTION The EV8867-LE-00A is used for demonstrating the performance of MPS’s MP8867. MP8867 is a highly integrated and high frequency synchronous step-down switcher with I2C control interface. It is optimized to support up to 8A load current over an input supply range from 4.5V to 17V with excellent load and line regulation. Current-Mode operation provides fast transient response and eases loop stabilization. The reference voltage level can be controlled, onthe fly through an I2C serial interface. Reference voltage range can be adjusted from 0.6V to 1.87V in 10mV steps. Voltage scaling slew rate, enable and power saving mode are also selectable through the I2C interface. Full protection features include over voltage, hiccup over-current protection and thermal shut down. The MP8867 is available in QFN-14(3mmx4mm) package. ELECTRICAL SPECIFICATION Parameter Input Voltage Output Voltage Output Current Symbol Value Units VIN VOUT IOUT 4.5– 17 1 8 V V A FEATURES Wide 4.5V-to-17V Operating Input Range 1% Internal Reference Accuracy I2C Programmable Reference Output Voltage Range from 0.6V to 1.87V in 10mV Steps with Slew Rate Control I2C Selectable Switching Frequency. 200kHz-2MHz Synchronized External Clock OTP, OCP Hiccup Indication Via I2C Selectable PSM and Fs Through I2C Programmable Soft Start Time Open-Drain Power Good Indicator Small 3x4mm QFN 14 Package APPLICATIONS SoC and Media Processors FPGA-based Systems ASIC Supplies Distributed Power Systems All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. EV8867-LE-00A EVALUATION BOARD 100 90 80 70 60 50 40 Board Number MPS IC Number EV8867-LE-00A MP8867GLE 30 0.01 0.10 1.00 EV8867-LE-00A Rev.1.0 www.MonolithicPower.com 7/30/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 10.00 1 EV8867-LE-00A – 8A HIGH EFFICIENCY SYNC. STEP DOWN SWITCHER WITH I2C EVALUATION BOARD SCHEMATIC R5 0Ω VIN C5 0.1µF 1 4.5V-17V L1 1.5µH 9 1V/8A 2 C1C NS C1 22µF C1A 22µF C1B 0.1µF 5 13 C3 0.47μF 10 7 SDA SCL 3 R3 51kΩ 11 4 C2B 22µF C2C 22µF C2D NS 14 8 3.3V R1 80.6kΩ C6 22pF R8 10Ω R2 120kΩ 12 6 R7 NS C2A 22µF R4 100kΩ EN PG R6 NS VOUT C2 22µF C4 22nF EV8867-LE-00A BILL OF MATERIALS Qty 1 1 1 1 1 2 1 RefDes R1 R2 R3 R5 R4 R6, R7 R8 Value 80.6k 120k 51k 0Ω 100k NS 10 Ω 2 C1B, C5 0.1μF 2 C1A, C1 22μF 4 C2, C2A, C2B, C2C 22μF 2 C2D, C1C NS 1 C3 0.47 μF 1 C4 22nF 1 C6 22pF 1 L1 1.5μH 1 U1 MP8867 Description Film Res,1% Film Res,1% Film Res,1% Film Res,1% Film Res,1% Film Res,1% Ceramic Cap,25V,X7R Ceramic Cap,25V,X5R Ceramic Cap， 25V,X5R Ceramic Cap,16V,X7R Ceramic Cap,16V,X7R Ceramic Cap,50V,C0G IR=11A,Isat=14A, DCR=6.6m Ω Step-Down Converter with I2C Interface Package 0603 0603 0603 0402 0603 Manufacturer ROYAL ROYAL ROYAL RALEC ROYAL Manufacturer P/N RC0603FR-0780K6L RL0603FR-07120KL RL0603FR-0751KL RTT020000FTP RL0603FR-07100KL 0603 ROYAL RL0603FR-0710RL 0603 muRata GRM188R71E104KA01D 1206 muRata GRM31CR61E226KE15L 0805 muRata GRM21BR61E226ME44L 0603 muRata GRM188R71C474KA88D 0603 muRata GRM188R71C223KA01D 0603 muRata GRM1885C1H220JA01D SMD Wurth 744 311 150 QFN14 (3*4) MPS MP8867GLE EV8867-LE-00A Rev.1.0 www.MonolithicPower.com 7/30/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 2 EV8867-LE-00A – 8A HIGH EFFICIENCY SYNC. STEP DOWN SWITCHER WITH I2C EVB TEST RESULTS Performance waveforms are tested on the evaluation board. VIN = 12V, VOUT = 1V, L = 1.5µH, TA = 25°C, unless otherwise noted. VOUT 500mV/div. VOUT 500mV/div. VPG 5V/div. VPG 5V/div. VSW 10V/div. VSW 10V/div. IL 10A/div. IL 10A/div. VOUT 500mV/div. VEN 5V/div. VPG 5V/div. VSW 10V/div. IL 10A/div. VOUT 500mV/div. VEN 5V/div. VPG 5V/div. VSW 10V/div. IL 5A/div. Start-Up through Enable Shutdown through Enable Shutdown through Enable IOUT = 8A IOUT = 0A IOUT = 8A VOUT 500mV/div. VEN 5V/div. VPG 5V/div. VSW 10V/div. IL 5A/div. VOUT 500mV/div. VEN 5V/div. VPG 5V/div. VSW 10V/div. IL 10A/div. VOUT 500mV/div. VIN 10V/div. VOUT 500mV/div. VIN 10V/div. VPG 5V/div. VSW 10V/div. IL 5A/div. VOUT 500mV/div. VIN 10V/div. VPG 5V/div. VSW 10V/div. IL 10A/div. VPG 5V/div. VSW 10V/div. IL 5A/div. EV8867-LE-00A Rev.1.0 www.MonolithicPower.com 7/30/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 3 EV8867-LE-00A – 8A HIGH EFFICIENCY SYNC. STEP DOWN SWITCHER WITH I2C EVB TEST RESULTS (continued) Performance waveforms are tested on the evaluation board. VIN = 12V, VOUT = 1V, L = 1.5µH, TA = 25°C, unless otherwise VOUT/AC 10mV/div. VOUT/AC 10mV/div. VOUT 500mV/div. VIN 5V/div. VPG 5V/div. VSW 10V/div. VIN/AC 100mV/div. VIN/AC 10mV/div. VSW 10V/div. VSW 10V/div. IL 10A/div. IL 5A/div. VOUT/AC 100mV/div. VOUT 500mV/div. VPG 5V/div. VSW 10V/div. IL 5A/div. VOUT 500mV/div. VPG 5V/div. VSW 10V/div. IL 5A/div. IL 500mA/div. VOUT 500mV/div. VPG 5V/div. VSW 10V/div. IL 2A/div. IL 2A/div. VOUT 500mV/div. VPG 5V/div. VSW 10V/div. IL 5A/div. EV8867-LE-00A Rev.1.0 www.MonolithicPower.com 7/30/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 4 EV8867-LE-00A – 8A HIGH EFFICIENCY SYNC. STEP DOWN SWITCHER WITH I2C PRINTED CIRCUIT BOARD LAYER Figure 1: Top Silk Layer Figure 2: Top Layer Figure 3: Inner 1 Layer Figure 4: Inner 2 Layer Figure 5: Bottom Layer EV8867-LE-00A Rev.1.0 www.MonolithicPower.com 7/30/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 5 EV8867-LE-00A – 8A HIGH EFFICIENCY SYNC. STEP DOWN SWITCHER WITH I2C QUICK START GUIDE 1. Connect the positive and negative terminals of the load to the VOUT and GND pins, respectively. 2. Preset the power supply output between 4.5V and 17V, and then turn off the power supply. 3. Connect the positive and negative terminals of the power supply output to the VIN and GND pins, respectively. 4. Turn the power supply on. The board will automatically start up. 5. To use the Enable function, apply a digital input to the EN pin. Drive EN higher than 1.52V to turn on the regulator, or less than 1.02V to turn it off. 6. To program I2C function, connect SCL, SDA and GND to I2C start kit board. Connect I2C start kit board to computer and run MP8867 GUI software to program MP8867 I2C register. 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. EV8867-LE-00A Rev.1.0 www.MonolithicPower.com 7/30/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 6