EV2276-D-00A High Efficiency, 8A,16V Synchronous Step-down Converter Evaluation Board DESCRIPTION FEATURES The EV2276-D-00A is an evaluation board for the MP2276, a high efficiency, monolithic, synchronous step-down converter. The EV board can deliver 8A continuous load current over a wide operating input range. High efficiency can be achieved over a wide output current load range. The MP2276 adopts internally compensated constant-on-time (COT) control mode that provides fast transient response and eases loop stabilization. This EV board can be turned on or off via a remote ON/OFF input (EN) that is referenced to ground. This input is compatible with popular logic devices. ELECTRICAL SPECIFICATION Parameter Input Voltage Output Voltage Output Current Symbol Value Units VIN VOUT IOUT 4-16 1 8 V V A Wide 4V to 16V input Voltage Range 8A Continuous Output Current 24mΩ/10mΩ Low RDS(ON) Integrated Power MOSFETs Adaptive COT for Ultrafast Transient Response Stable with Zero-ESR Output Capacitor Programmable Current Limit Selectable Forced CCM or Pulse-Skip Operation at Light Load Excellent Load Regulation Programmable Soft Start Time from 1.7ms and up Pre-Bias Start up Selectable 600kHz, 1100kHz or 2000kHz Switching Frequency Hiccup OCP Protection Auto Retry OVP Protection and Thermal Shutdown Output Adjustable from 0.8V Available in QFN-14 (2x3mm) package APPLICATIONS Digital Set Top Boxes Flat panel TV and Monitors 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. EV2276-D-00A EVALUATION BOARD Efficiency vs. Output Current VOUT=1V, L=1µH (DCR=4.6mΩ) 100 Efficiency(%) 90 (L × W ) 78cm × 81cm Board Number MPS IC Number EV2276-D-00A MP2276GD 80 70 60 Vin=5V Vin=12V Vin=16V 50 40 0.01 0.10 1.00 Output Current(A) EV2276-D-00A Rev.1.0 www.MonolithicPower.com 9/25/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. 10.00 1 EV2276-D-00A –SYNCHRONOUS STEP-DOWN CONVERTER EV BOARD EVALUATION BOARD SCHEMATIC 10 3 Vin C1A 10µF C1 10µF R5 300K 5 EN 9 PG 13 R6 NS R4 100K C3 1µF R9 121k R8 60.4k R7 30.1k SW 2,11 C6 1.5nF EN PG C2 C2A C2B C2C C2D 22µF 22µF 22µF 22µF 22µF R1 2K Vout C2E NS 6 FB VCC 1V GND MP2276 R2 8.06K 12 R10 243k BST VIN C1B 1µF C4 L1 1µF 1µH SS/TRK FREQ/ MODE Jumper PGND AGND 1,14 ILIM 7 8 4 R3 3.6K C5 15nF Ext. Ref (Optional) EV2276-D-00A BILL OF MATERIALS Qty Ref Value Description 2 10μF Ceramic Cap,25V,X5R 1206 Murata GRM31CR61E106KA12L 1μF Ceramic Cap,25V,X7R 0603 Murata GRM188R71E105KA12D 22μF Ceramic Cap, 16V, X5R 0805 Murata GRM219R61C226ME15L 0 C1, C1A C1B, C3, C4 C2, C2A, C2B, C2C, C2D C2E 1 C5 15nF Ceramic Cap,50V,X7R 0603 Murata GRM188R71H153KA01D 1 C6 1.5nF Ceramic Cap,50V,COG 0603 Murata GRM1885C1H152JA01D 1 R1 2k Film Res., 1% 0603 Yageo RC0603FR-072KL 1 R2 8.06k Film Res., 1% 0603 Yageo RC0603FR-078K06L 1 R3 3.6k Film Res., 1% 0603 Yageo RC0603FR-073K6L 1 R4 100k Film Res., 1% 0603 RC0603FR-07100KL 1 R5 300k Film Res., 1% 0603 Yageo Yageo 0 R6 NS 1 R7 30.1k Film Res., 1% 0603 Yageo RC0603FR-0730K1L 1 R8 60.4k Film Res., 1% 0603 Yageo RC0603FR-0760K4L 1 R9 121k Film Res., 1% 0603 Yageo RC0603FR-07121KL 1 R10 243k Film Res., 1% 0603 Yageo RC0603FR-07243KL 1 L1 1μH DCR 4.6mΏ,Isat 19A Wurth 744311100 1 U1 SMD QFN142X3mm MPS MP2276GD 3 5 Package Manufacturer Part Number NS MP2276GD 16V/8A Step Down Convert RC0603FR-07300KL EV2276-D-00A Rev.1.0 www.MonolithicPower.com 9/25/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. 2 EV2276-D-00A –SYNCHRONOUS STEP-DOWN CONVERTER EV BOARD EVB TEST RESULTS Performance waveforms are tested on the EV2276-D-00A evaluation board. VIN=12V, VOUT=1V, L=1µH, FSW=600kHz, pulse skip mode. TA = +25°C, unless otherwise noted. Line Regulation 0.10 0.1 0.06 0.06 Line Regulation(%) Load Regulation(%) Load Regulation 0.02 -0.02 Vin=5V Vin=12V Vin=16V -0.06 0.02 -0.02 Iout = 0.01 A Iout = 4 A Iout = 8 A -0.06 -0.10 -0.1 0 1 2 3 4 5 6 7 8 Output Current(A) 4 8 12 Input Voltage(V) 16 Case Temperature Rise vs. Output Current 4 Layers PCB, size is 7.75cmx8.13cm. Case Temperature Rise (⁰C) 40 30 20 10 0 0 1 2 3 4 5 6 Output Current (A) 7 8 EV2276-D-00A Rev.1.0 www.MonolithicPower.com 9/25/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. 3 EV2276-D-00A –SYNCHRONOUS STEP-DOWN CONVERTER EV BOARD EVB TEST RESULTS (continued) Performance waveforms are tested on the EV2276-D-00A evaluation board. VIN=12V, VOUT=1V, L=1µH, FSW=600kHz, pulse skip mode. TA = +25°C, unless otherwise noted. Start-Up through Input Voltage Shutdown through Input Voltage IOUT=0A IOUT=0A CH1: VOUT 500mV/div. CH1: VOUT 500mV/div. CH2: VIN 10V/div. CHR1: VPG 5V/div CHR1: VPG 5V/div CH2: VIN 10V/div. CH3: VSW 10V/div. CH3: VSW 10V/div. CH4: IL 2A/div. CH4: IL 2A/div. 1ms/div. 200ms/div. Start-Up through Input Voltage Shutdown through Input Voltage IOUT=8A IOUT=8A CH1: VOUT 500mV/div. CH1: VOUT 500mV/div. CH2: VIN 10V/div. CH2: VIN CHR1: VPG 5V/div 10V/div. CHR1: VPG 5V/div. CH3: VSW 10V/div. CH3: VSW 5V/div. CH4: IL 10A/div. CH4: IL 10A/div. 1ms/div. 100µs/div. Start-Up through Enable Shutdown through Enable IOUT=0A IOUT=0A CH1: VOUT 500mV/div. CH1: VOUT 500mV/div. CHR1: VPG 5V/div. CHR1: VPG 5V/div. CH2: VEN 5V/div. CH2: VEN 5V/div. CH3: VSW 10V/div. CH3: VSW 10V/div. CH4: IL 2A/div. CH4: IL 1A/div. 1ms/div. 5ms/div. EV2276-D-00A Rev.1.0 www.MonolithicPower.com 9/25/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. 4 EV2276-D-00A –SYNCHRONOUS STEP-DOWN CONVERTER EV BOARD EVB TEST RESULTS (continued) Performance waveforms are tested on the EV2276-D-00A evaluation board. VIN=12V, VOUT=1V, L=1µH, FSW=600kHz, pulse skip mode. TA = +25°C, unless otherwise noted. Start-Up through Enable Shutdown through Enable IOUT=8A IOUT=8A CH1: VOUT 500mV/div. CH1: VOUT 500mV/div. CHR1: VPG 5V/div CHR1: VPG 5V/div CH2: VEN 5V/div. CH2: VEN 5V/div. CH3: VSW 10V/div. CH3: VSW 10V/div. CH4: IL 10A/div. CH4: IL 10A/div. 1ms/div. 20µs/div. Input / Output Ripple Input / Output Ripple IOUT=0A IOUT=8A CH1: VOUT/AC 50mV/div. CH1: VOUT/AC 50mV/div. CH2: VIN/AC 50mV/div. CH2: VIN/AC 100mV/div. CH3: VSW 10V/div. CH3: VSW 10V/div. CH4: IL 2A/div. CH4: IL 5A/div. 20ms/div. 1µs/div. Transient Response Short-Circuit Entry IOUT=4A-8A, Slew Rate=2.5A/µs by Eload IOUT=0A CH1: VOUT 1V/div. CH1: VOUT/AC 50mV/div. CH2: VPG 5V/div. CH3: VSW 10V/div. CH4: IOUT 2A/div. CH4: IL 10A/div. 100µs/div. 10ms/div. EV2276-D-00A Rev.1.0 www.MonolithicPower.com 9/25/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. 5 EV2276-D-00A –SYNCHRONOUS STEP-DOWN CONVERTER EV BOARD EVB TEST RESULTS (continued) Performance waveforms are tested on the EV2276-D-00A evaluation board. VIN=12V, VOUT=1V, L=1µH, FSW=600kHz, pulse skip mode. TA = +25°C, unless otherwise noted. Short Circuit Recovery IOUT=0A CH1: VOUT 1V/div. CH2: VPG 5V/div. CH3: VSW 10V/div. CH4: IL 10A/div. 10ms/div. EV2276-D-00A Rev.1.0 www.MonolithicPower.com 9/25/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. 6 EV2276-D-00A –SYNCHRONOUS STEP-DOWN CONVERTER EV BOARD PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Silk Layer Figure 2—Top Layer Figure 3—Inner Layer 1 Figure 4— Inner Layer 2 Figure 5—Bottom Layer and Bottom Silk Layer EV2276-D-00A Rev.1.0 www.MonolithicPower.com 9/25/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. 7 EV2276-D-00A –SYNCHRONOUS STEP-DOWN CONVERTER EV BOARD 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 voltage between 4V and 16V, 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. Make sure the power supply has current limit high enough to supply the power. 4. Turn the power supply on. The EV2276-D-00A will automatically startup. 5. For low VIN and heavy load case, choose larger input cap to improve stability. 6. To use the Enable function, apply a digital input to the EN pin. Drive EN higher than 1.27V to turn on the regulator or less than 0.93V to turn it off. 7. Use R1 and R2 to set the output voltage with VFB = 0.8 V. Follow the Application Information section in the device datasheet to select the proper values of R1, R2, inductor and output capacitor values when output voltage is changed. 8. The JP1 jumper can be used to select the operating frequency (600kHz, 1100kHz or 2000kHz) and light load operation mode (Pulse Skip or CCM). 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. EV2276-D-00A Rev.1.0 www.MonolithicPower.com 9/25/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. 8