MP2305 2A, 23V Synchronous Rectified Step-Down Converter The Future of Analog IC Technology DESCRIPTION FEATURES The MP2305 is a monolithic synchronous buck 2A Output Current regulator. The device integrates 130m Wide 4.75V to 23V Operating Input Range MOSFETS that provide 2A continuous load Integrated 130m Power MOSFET Switches current over a wide operating input voltage of Output Adjustable from 0.923V to 20V 4.75V to 23V. Current mode control provides Up to 93% Efficiency fast transient response and cycle-by-cycle Programmable Soft-Start current limit. Stable with Low ESR Ceramic Output Capacitors An adjustable soft-start prevents inrush current Fixed 340kHz Frequency at turn-on. Shutdown mode drops the supply Cycle-by-Cycle Over Current Protection current to 1A. Input Under Voltage Lockout This device, available in an 8-pin SOIC APPLICATIONS package, provides a very compact system Distributed Power Systems solution with minimal reliance on external Networking Systems components. FPGA, DSP, ASIC Power Supplies EVALUATION BOARD REFERENCE Green Electronics/ Appliances Board Number Dimensions Notebook Computers EV2305DS-00A 2.0X x 1.5Y x 0.5Z All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Products, Quality Assurance page. MPS and The Future of Analog IC Technology are registered trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION C5 Efficiency vs 10nF Load Current 100 95 V = 3.3V OUT 90 2 1 IN BS 85 7 3 V = 2.5V OUT EN SW 80 MP2305 75 5 8 SS FB 70 GND COMP 4 6 65 60 55 50 0 0.5 1.0 1.5 2.0 2.5 LOAD CURRENT (A) MP2305-EC01 MP2305 Rev. 1.83 www.MonolithicPower.com 1 12/24/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2013 MPS. All Rights Reserved. EFFICIENCY (%)MP2305 2A, 23V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER ORDERING INFORMATION Part Number* Package Top Marking Free Air Temperature (T ) A SOIC8 MP2305DS MP2305DS -40 C to +85 C * For Tape & Reel, add suffix Z (e.g. MP2305DSZ) For RoHS compliant packaging, add suffix LF (e.g. MP2305DSLFZ) PACKAGE REFERENCE TOP VIEW BS 1 8 SS IN 2 7 EN SW 3 6 COMP GND 4 5 FB MP2305 PD01 (1) (4) ABSOLUTE MAXIMUM RATINGS Thermal Resistance JA JC Supply Voltage V .......................0.3V to +26V SOIC8..................................... 90...... 45... C/W IN Switch Voltage V ............................................. SW Notes: 1V (-5V for <10ns) to 26.3V (28V for <10ns) 1) Exceeding these ratings may damage the device. Boost Voltage V ..........V 0.3V to V + 6V BS SW SW 2) The maximum allowable power dissipation is a function of the maximum junction temperature T (MAX), the junction-to- All Other Pins.................................0.3V to +6V J (2) ambient thermal resistance , and the ambient temperature JA Continuous Power Dissipation (T = +25C) A T . The maximum allowable continuous power dissipation at A .1.39W any ambient temperature is calculated by P (MAX)=(T (MAX)- D J T )/ . Exceeding the maximum allowable power dissipation A JA Junction Temperature...............................150C will cause excessive die temperature, and the regulator will go Lead Temperature ....................................260C into thermal shutdown. Internal thermal shutdown circuitry Storage Temperature ............. 65C to +150C protects the device from permanent damage. 3) The device is not guaranteed to function outside of its (3) operating conditions. Recommended Operating Conditions 4) Measured on JESD51-7 4-layer PCB. Input Voltage V ............................4.75V to 23V IN Output Voltage V .....................0.923V to 20V OUT Operating Junction Temp. (T ). -40C to +125C J MP2305 Rev. 1.83 www.MonolithicPower.com 2 12/24/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2013 MPS. All Rights Reserved.