EV1584EN-00A 3A, 28V, 1.5MHz Step-Down Converter Evaluation Board The Future of Analog IC Technology DESCRIPTION FEATURES The EV1584EN-00A is an evaluation board for the MP1584, a high frequency step-down regulator with an integrated power MOSFET. • • • • The MP1584 integrates a 150mΩ MOSFET that provides 3A load current over a wide operating input voltage of 4.5V to 28V. Current mode control provides fast transient response and eases loop stabilization. An internal soft-start prevents inrush current at turn-on. The EV1584EN-00A is a fully assembled and tested PCB. It generates a +3.3V output voltage at load current up to 3A from an 8V to 28V input range. Switching frequency is set at 500KHz. 3A Output Current Wide 8V to 28V Operating Input Range Adjustable Output from 0.8V to 25V Programmable Switching Frequency up to 1.5MHz APPLICATIONS • • • • • • Game Machines Automotive Systems Industrial Power Systems Distributed Power Systems Printer Systems Battery Powered Systems “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. ELECTRICAL SPECIFICATIONS Parameter Input Voltage Output Voltage Output Current Symbol Value Units VIN VOUT IOUT 8 – 28 3.3 3 V V A EV1584EN-00A EVALUATION BOARD Efficiency Curve 100 (fSW=500kHz) 90 VIN=12V EFFICIENCY (%) 80 70 60 VIN=24V 50 40 30 20 (L x W x H) 2.5” x 2.5” x 0.4” (6.35cm x 6.35cm x 1.0cm) Board Number MPS IC Number EV1584EN-00A MP1584EN EV1584EN-00A Rev. 1.0 9/22/2011 10 0 0.01 0.1 1 10 OUTPUT CURRENT (A) www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 1 EV1584EN-00A – 3A, 28V, 1.5MHz STEP-DOWN CONVERTER EV BOARD MPS CONFIDENTIAL AND PROPRIETARY INFORMATION – INTERNAL USE ONLY EVALUATION BOARD SCHEMATIC D1 NS C5 100nF D3 NS 8 7 VIN VIN BST SW 1 DR1050-100-R GND C11 NS D2 PDS560 2 EN EN MP1584 FB VOUT 3.3V/3A GND 4 C4 NS 6 FREQ GND COMP 3 C6 220pF 5 C10 NS C7 NS EV1584EN-00A BILL OF MATERIALS Qty Ref Value Description 2 2 4.7µF 0.1µF Ceramic Cap., 50V, X7R Ceramic Cap., 50V, X7R 1 1 1 1 1 1 1 1 1 1 2 1 C1, C2 C3, C9 C4,C7, C10,C11 C5 C6 C8 R1 R2 R3 R4 R5 R6 R7 D1, D3 D2 1 L1 1 U1 4 NS EV1584EN-00A Rev. 1.0 9/22/2011 Part Number 1210 0805 Murata TDK GRM32ER71H475KA88L C2012X7R1H104K 0603 0603 1210 0603 0603 0603 0603 0603 0603 TDK TDK TDK Yageo Yageo Yageo Yageo Yageo Yageo C1608X7R1H104K C1608C0G1H221J C3225X5R0J226M RC0603FR-0724K9L RC0603FR-07100KL RC0603FR-07200KL RC0603FR-0740K2L RC0603FR-0751KL RC0603FR-07124KL PowerDI SMD SMD SO8 Diodes Inc Cooper TOKO MPS PDS560 DR1050-100-R D104-#919AS-100M MP1584EN Not Stuffed 100nF 220pF 22µF 24.9kΩ 100kΩ 200kΩ 40.2kΩ 51kΩ 124kΩ NS NS 10µH Package Manufacturer Ceramic Cap., 50V, X7R Ceramic Cap., 50V, NPO Ceramic Cap., 6.3V, X5R Film Res., 1% Film Res., 1% Film Res., 1% Film Res., 1% Film Res., 1% Film Res., 1% Not Stuffed Not Stuffed Diode Schottky, 60V, 5A Inductor, 4.58A Inductor, 4.3A Step-Down Regulator www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 2 EV1584EN-00A – 3A, 28V, 1.5MHz STEP-DOWN CONVERTER EV BOARD MPS CONFIDENTIAL AND PROPRIETARY INFORMATION – INTERNAL USE ONLY PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Silk Layer Figure 2—Top Layer Figure 3—Bottom Layer EV1584EN-00A Rev. 1.0 9/22/2011 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 3 EV1584EN-00A – 3A, 28V, 1.5MHz STEP-DOWN CONVERTER EV BOARD MPS CONFIDENTIAL AND PROPRIETARY INFORMATION – INTERNAL USE ONLY 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 to between 8V and 28V, then turn it off. 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 EV1584EN will automatically startup. 5. To use the Enable function, apply a digital input to the EN pin. Drive EN higher than 1.6V to turn on the regulator, drive EN less than 1.2V to turn it off. 6. An input under voltage lockout (UVLO) function is implemented by the addition of a resistor divider R1 and R2. The EN threshold is 1.2V (falling edge), so VIN UVLO falling threshold is R2 ⎞ ⎛ 1. 2 V × ⎜ 1 + ⎟ . It is preset to 6V on this board. R1 ⎠ ⎝ 7. Use R4 and R6 to set the output voltage with VFB = 0.8V. For R4 = 40.2kΩ, R6 can be determined by: R6 = 50.25 × (VOUT − 0.8 ) (kΩ). Follow the Application Information section in the device datasheet to recalculate the compensation, inductor and output capacitor values when output voltage is changed. NOTICE: The information in this document is subject to change without notice. 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. EV1584EN-00A Rev. 1.0 9/22/2011 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 4