EV28115DQ-00B 4A, 6V, Synchronous Step-Down Switching Regulator EV Board The Future of Analog IC Technology DESCRIPTION FEATURES The EV28115DQ-00B is an evaluation board for the MP28115. The MP28115 delivers 4A continuous load current over an operating input voltage 2.7V to 6.0V. The output is adjustable over a range of 0.8V to 0.9xVIN by means of an external resistor from FB pin to ground. The current mode control used in MP28115 provides fast transient response and cycle-bycycle current limiting. The EV board will go into hiccup mode to protect against over current/short circuit. This EV board can be turned on or shut down via a remote ON/OFF input that is referenced to ground. This input is compatible with popular logic devices. • • • • • 4A Output Current 2.7V to 6.0V Operating Input Range Built-in Soft Start Adjustable Output from 0.8V to 0.9xVIN Fully Assembled and Tested APPLICATIONS • • • • µP/ASIC/DSP/FPGA Core and I/O Supplies Printers and LCD TVs Network and Telecom Equipment Point of Load Regulators “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. This EV board also has power good indicator. The output of POK is pulled to ground when output voltage is under or over 10% of its setting voltage. ELECTRICAL SPECIFICATIONS Parameter Input Voltage Output Voltage Output Current Symbol Value Units VIN VOUT IOUT 2.7 – 6.0 1.8 4 V V A EV28115DQ–00B EVALUATION BOARD 100 95 90 85 80 75 70 (L x W x H) 2.4” x 2.0” x 0.5” (6.1cm x 5.1cm x 1.4 cm) Board Number MPS IC Number EV28115DQ-00B MP28115DQ EV28115DQ-00B Rev. 1.0 10/12/2009 65 60 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 OUTPUT CURRENT (A) www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 1 EV28115DQ-00B – 4A, 5.5V, SYNCHRONOUS STEP-DOWN REGULATOR EV BOARD EVALUATION BOARD SCHEMATIC D3 NS D1 NS C2 22µF 16V R9 0Ω R6 0Ω VIN R5 100kΩ GND C1 22µF 16V 4, 7 R4 100kΩ POK C8 NS SW FB EN/SYNC C5 NS 1 C7 NS GND 2, 9, 11 GND R7 NS R1 12.4kΩ R8 200kΩ GND R3 NS VOUT C4 22µF 6.3V C6 22µF 6.3V D2 B0540W-7-F MP28115 10 ON/OFF L1 0.95µH 3, 8 BST IN 6 POK/VCC C3 100nF 16V 5 R2 10kΩ EV28115DQ–00B BILL OF MATERIALS Qty 2 1 2 1 1 2 2 2 1 2 Ref C1, C2 C3 C4, C6 C5, C7, C8 R1 R2 R3, R7 R4, R5 R6, R9 R8 D1, D3 1 D2 1 L1 1 U1 3 Value 22µF 100nF 22µF NS Description Ceramic Cap., 16V, X7R Ceramic Cap., 16V, X7R Ceramic Cap., 6.3V, X7R Package 1210 0603 1210 Manufacturer Murata Murata Murata Manufacturer P/N GRM32ER71C226K GRM188R71C104K GRM32ER70J226K 0603 0603 Yageo Yageo RC0603FR-0712K4L RC0603FR-0710K0L 0603 0603 0603 Yageo Yageo Yageo RC0603FR-07100KL RC0603JR-0700R0L RC0603JR-07200KL SOD-123 Diodes Inc B0540W-7-F Not Stuffed 12.4kΩ 10 kΩ NS 100 kΩ 0Ω 200 kΩ NS 0.5A, 40V Film Resistor, 1% Film Resistor, 1% Not Stuffed Film Resistor, 5% Film Resistor, 5% Film Resistor, 5% Not Stuffed 0.95µH Inductor, DCR=7.4mΩ SMD Step-Down Regulator QFN10 EV28115DQ-00B Rev. 1.0 10/12/2009 Schottky Diode Wurth Electronics MPS www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 744310095 MP28115DQ 2 EV28115DQ-00B – 4A, 5.5V, SYNCHRONOUS STEP-DOWN REGULATOR 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 EV28115DQ-00B Rev. 1.0 10/12/2009 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 3 EV28115DQ-00B – 4A, 5.5V, SYNCHRONOUS STEP-DOWN REGULATOR 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 to 3.3V-6.0V, 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 EV28115DQ board 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 0.4V to turn it off. 6. Use R1 and R2 to set the output voltage with VFB = 0.8V. Follow the Application Information section in the device datasheet to select the proper value of R1, R2, 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. EV28115DQ-00B Rev. 1.0 10/12/2009 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 4