EV3212DQ-00A 1.3A, 1MHz Micropower Step-Up Converter The Future of Analog IC Technology DESCRIPTION The EV3212DQ-00A is the evaluation board of MP3212, a constant frequency, 10-pin QFN current mode step-up converter intended for small, low power applications. The EV3212DQ operates from an input voltage as low as 2.3V and can generate as high as 28V output voltage and up to 100mA output current. The EV3212 features PFM at light loads for high efficiency. The EV3212 includes undervoltage lockout, output over-voltage protection, current limiting, and thermal overload protection to prevent damage in the event of an output overload. ELECTRICAL SPECIFICATIONS Parameter Symbol Value Units Supply Voltage VIN 2.3 to 5.5 V Output Current IOUT 0 to 100 mA FEATURES • • • • • • • • • 180µA Quiescent Current 2.3V to 5.5V Input Voltage 1MHz Fixed Switching Frequency 1.3A Switch Current Limit Input-output disconnect Up to 28V Output Voltage Automatic Pulse Frequency Modulation Mode at Light Loads Over 85% Efficiency Available in a 10-Pin QFN Package APPLICATIONS • • • • • OLED Biasing LCD Bias Supply White LED Driver PDAs Digital Still Cameras “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. EV3212DQ-00A EVALUATION BOARD Efficiency vs. Load Current 90 EFFIICENCY (%) 85 80 Vin=3.6V 75 Vin=4.2V Vin=2.7V 70 65 60 Board Number MPS IC Number EV3212DQ-00A MP3212DQ EV3212DQ-00A Rev. 1.0 9/1/2009 0 0.05 0.1 0.15 0.2 LOAD CURRENT (A) www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 1 EV3212DQ-00A –1.3A, 1MHz, MICROPOWER STEP-UP CONVERTER EVALUATION BOARD SCHEMATIC D1 40V/2A U1 2 3 VIN VDDOUT SW VDD VOUT 10 9 MP3212DQ 1 PGND SHDN 8 VOUT C2 NS CN1 GND PGND 4 7 NC AGND NC EPD FB D2 NS R2 133K 6 C7 NS R4 NS 5 11 R1 10K EV3212DQ-00A BILL OF MATERIALS Qty Ref Value 1 2 1 1 1 1 1 1 1 C1 C2,C7 C4 C5 R1 R2 D1 D2 CN1 3.3uF NS 10uF 0.1uF 10KΩ 133KΩ 2A,40V NS 1 Jumper Short 1 L1 10 uH 1 U1 EV3212DQ-00A Rev. 1.0 9/1/2009 Package Manufacturer Ceramic Cap., 50V, X7R Description 1210 Murata GRM32DR71H335KA88L Ceramic Cap., 16V, X7R Ceramic Cap., 16V, X7R Film Resistor, 1% Film Resistor, 1% Schottky Diode 1206 0603 0603 0603 SMA Murata Murata Yageo Yageo Diode Inc GRM31CR71C106KA64L GRM188R71C104KA01D RC0603FR-0710K0L RC0603FR-0133K0L B240A-13-F 2-Pin Header,0.1” 2 PIN 2.54mm Short Jumper Inductor, Idc=2.7A, DCR=71mΩ Step-down Regulator Manufacturer P/N Sullins PTC02SAAN 0.1” Sullins STC02SYAN 8x8x4mm TOKO B1015AS-100M QFN10 MPS MP3212DQ-R1 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 2 EV3212DQ-00A –1.3A, 1MHz, MICROPOWER STEP-UP CONVERTER PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top and Top Silk Layer Figure 3—Top Layer EV3212DQ-00A Rev. 1.0 9/1/2009 Figure 2—Top Silk Layer Figure 4—Bottom Layer www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 3 QUICK START GUIDE The output voltage of this board is set to 18V. The board layout accommodates most commonly used inductors and output capacitors. 1. Preset Power Supply to 2.5V ≤ VIN ≤ 5.5V. 2. Turn Power Supply off. 3. Connect Power Supply terminals to: Positive (+): VIN Negative (–): GND 4. Connect Load to: Positive (+): VOUT Negative (–): GND 5. Turn Power Supply on after making connections. 6. The MP3212 is enabled on the evaluation board once VIN is applied. To disable the MP3212, disconnect CN1. 7. The output voltage VOUT can be changed by varying R2. Calculate the new value using the formula: R2 = ( VOUT − 1) × R1 VFB Where VFB = 1.24V and R1 = 10kΩ For example, for VOUT = 18V R2= (18V/1.24V-1)x 10kΩ=135.2kΩ Therefore use a 133kΩ standard 1% value resistor. 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. EV3201DQ-00A Rev. 1.0 9/1/2009 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 4