EV2325-J-00A High Efficiency, 3A, 24V, 500kHz Step-Down Switch Evaluation Board The Future of Analog IC Technology DESCRIPTION FEATURES The EV2325-J-00A demonstrates MPS’s MP2325, a high-frequency, synchronous, rectified, step-down converter with built-in highside and low-side power MOSFETs. The MP2325 offers a very compact solution to achieve a 3A continuous output current with excellent load and line regulation over a wide input supply range. The MP2325 has synchronous mode operation for higher efficiency over the output current load range. Current-mode operation provides fast transient response and eases loop stabilization. Full protection features includes over-current protection and thermal shutdown. The MP2325 is available in a space-saving 8pin TSOT23 package. • • • • • • • • • • • Wide 4.5V to 24V Operating Input Range 90mΩ/40mΩ Low Rds(on) Internal Power MOSFETs Low Quiescent Current High Efficiency Synchronous Mode Operation Fixed 500kHz Switching Frequency Frequency Sync from 200kHz to 2MHz External Clock Power Save Mode at light load Internal Soft Start Power Good Indicator OCP Protection and Hiccup Thermal Shutdown Output Adjustable from 0.8V Available in an 8-pin TSOT-23 package APPLICATIONS ELECTRICAL SPECIFICATION Parameter • • Symbol Value Units Input Voltage Output Voltage VIN VOUT 4.5 – 24 3.3 V Output Current IOUT 3 V A • • • Notebook Systems and I/O Power Digital Set Top Boxes Flat Panel Television and Monitors All MPS parts are lead-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. EV2325-J-00A EVALUATION BOARD Board Number MPS IC Number EV2325-J-00A MP2325GJ EV2325-J-00A Rev.1.0 www.MonolithicPower.com 4/24/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 1 EV2325-J-00A – 24V, 500kHz, 3A, STEP-DOWN CONVERTER EVALUATION BOARD SCHEMATIC EV2325-J-00A BILL OF MATERIALS Qty 1 1 Value 0.1μF 22μF 2 1 2 1 1 1 1 1 1 1 1 1 RefDes C1 C1A C7,R8, C5 C2,C2A C3 C4,C6 R1 R2 R3 R4 R5 R6 R7 R9 R10 1 L1 4.9μH 1 U1 MP2325 0 Description Ceramic Cap., 25V, X7R Ceramic Cap., 25V, X5R Package 0805 1206 Manufacturer muRata muRata Manufacturer P/N GRM21BR71E104KA01L GRM31CR61E226KE15L Ceramic Cap., 10V, X7R Ceramic Cap., 50V, C0G Ceramic Cap., 16V, X7R Thick Film Res., 1% Thick Film Res., 1% Thick Film Res., 1% Thick Film Res., 5% Thick Film Res., 1% Thick Film Res., 1% Thick Film Res., 1% Thick Film Res., 1% Thick Film Res., 1% Inductor, DCR=14.5mΩ, Is=6.5A Synchronous Step-Down Convert 1206 0603 0603 0603 0603 0603 0603 0603 0603 0603 0603 0603 muRata muRata muRata Yageo Yageo Yageo Yageo Yageo Yageo Yageo Yageo Yageo GRM21BR60J226ME39L GRM1885C1H150JA01D GRM188R71C104KA01D 9C06031A4022FKHFT 9C06031A132FKHFT 9C06031A0R00JLHFT 9C06031A20R0JLHFT 9C06031A2872FKHFT 9C06031A1102FKHFT 9C06031A1003FKHFT 9C06031A3302FKHFT 9C06031A10R0FKHFT SMD Wurth 744314490 TSOT238 MPS MP2325GJ NS 22μF 15pF 0.1μF 40.2k 13k 0Ω 20Ω 28.7k 11k 91k 33k 10Ω EV2325-J-00A Rev.1.0 www.MonolithicPower.com 4/24/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 2 EV2325-J-00A – 24V, 500kHz, 3A, STEP-DOWN CONVERTER EVB TEST RESULTS Performance waveforms are tested on the evaluation board. VIN = 12V, VOUT = 3.3V, TA = 25°C, unless otherwise noted. EV2325-J-00A Rev.1.0 www.MonolithicPower.com 4/24/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 3 EV2325-J-00A – 24V, 500kHz, 3A, STEP-DOWN CONVERTER EVB TEST RESULTS (continued) Performance waveforms are tested on the evaluation board. VIN = 12V, VOUT = 3.3V, TA = 25°C, unless otherwise noted. EV2325-J-00A Rev.1.0 www.MonolithicPower.com 4/24/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 4 EV2325-J-00A – 24V, 500kHz, 3A, STEP-DOWN CONVERTER PRINTED CIRCUIT BOARD LAYOUT Figure 2—Top Silk Layer Figure 1—Top Layer Figure 3—Bottom Layer EV2325-J-00A Rev.1.0 www.MonolithicPower.com 4/24/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 5 EV2325-J-00A – 24V, 500kHz, 3A, STEP-DOWN CONVERTER 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 24V, 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/SYNC pin. Drive EN higher than 1.4V to turn on the regulator, or less than 1.25V to turn it off. 6. To use the external synchronous function to adjust the switching frequency, apply an external clock signal to EN/SYNC pin. 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. EV2325-J-00A Rev.1.0 www.MonolithicPower.com 4/24/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 6