MP4460DQ-LF-P Monolithic Power Systems

MP4460 2.5A, 4MHz, 36V Step-Down Converter The Future of Analog IC Technology DESCRIPTION FEATURES The MP4460 is a high frequency step-down 120 A Quiescent Current switching regulator with an integrated internal Wide 3.8V to 36V Operating Input Range high-side high voltage power MOSFET. It 150m Internal Power MOSFET provides 2.5A output with current mode control for Up to 4MHz Programmable Switching fast loop response and easy compensation. Frequency Ceramic Capacitor Stable The wide 3.8V to 36V input range accommodates Internal Soft-Start a variety of step-down applications, including Internally Set Current Limit without a those in an automotive input environment. A Current Sensing Resistor 120A operational quiescent current allows use in battery-powered applications. Up to 95% Efficiency Output Adjustable from 0.8V to 30V High power conversion efficiency over a wide Available in a 3mm x 3mm QFN10 Package load range is achieved by scaling down the switching frequency at light load condition to APPLICATIONS reduce the switching and gate driving losses. High Voltage Power Conversion The frequency foldback helps prevent inductor Automotive Systems current runaway during startup and thermal Industrial Power Systems shutdown provides reliable, fault tolerant Distributed Power Systems operation. Battery Powered Systems In some applications, such as AM radio and All MPS parts are lead-free and adhere to the RoHS directive. For MPS green ADSL applications, in which the device is status, please visit MPS website under Products, Quality Assurance page. MPS and The Future of Analog IC Technology are registered trademarks of sensitive to frequency band, the MP4460 can Monolithic Power Systems, Inc. avoid the related EMI problem by setting the frequency at 4MHz. The MP4460 is available in a small 3mm x 3mm QFN10 package. TYPICAL APPLICATION C4 100nF Efficiency vs Load Current 100 10 V =5V IN 8,9 BST 1,2 V OUT 90 SW V VIN IN 3.3V D1 80 V =12V IN V =24V 3 5 IN 70 EN FB EN MP4460 60 7 4 50 COMP FREQ C3 40 GND 220pF V =3.3V OUT 6 30 0 0.5 1.0 1.5 2.0 2.5 LOAD CURRENT (A) MP4460 Rev. 1.03 www.MonolithicPower.com 1 2/27/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2014 MPS. All Rights Reserved. EFFICIENCY (%)MP4460 2.5A, 4MHz, 36V STEP-DOWN CONVERTER ORDERING INFORMATION Part Number* Package Top Marking MP4460DQ QFN10 (3x3mm) M7 * For Tape & Reel, add suffix Z (e.g. MP4460DQZ) For RoHS, compliant packaging, add suffix LF (e.g. MP4460DQLFZ). PACKAGE REFERENCE TOP VIEW SW 1 10 BST SW 2 9 VIN EN 3 8 VIN COMP 4 7 FREQ FB 5 6 GND EXPOSED PAD ON BACKSIDE (1) (4) ABSOLUTE MAXIMUM RATINGS Thermal Resistance JA JC Supply Voltage (V ).....................0.3V to +40V QFN10 (3mm x 3mm)............. 50...... 12... C/W IN Switch Voltage (V )............ 0.3V to V + 0.3V SW IN Notes: BST to SW .....................................0.3V to +6V 1) Exceeding these ratings may damage the device. All Other Pins.................................0.3V to +6V 2) The maximum allowable power dissipation is a function of the (2) maximum junction temperature T (MAX), the junction-to- J Continuous Power Dissipation (T = +25C) A ambient thermal resistance , and the ambient temperature JA QFN10 (3mm x 3mm) ................................ 2.5W T . The maximum allowable continuous power dissipation at A any ambient temperature is calculated by P (MAX) = (T D J Junction Temperature...............................150C (MAX)-T )/ . Exceeding the maximum allowable power A JA Lead Temperature ....................................260C dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal Storage Temperature.............. 65C to +150C shutdown circuitry protects the device from permanent (3) damage. Recommended Operating Conditions 3) The device is not guaranteed to function outside of its Supply Voltage V ...........................3.8V to 36V IN operating conditions. 4) Measured on JESD51-7, 4-layer PCB Output Voltage V .........................0.8V to 30V OUT Operating Temperature........... 40 C to +125 C MP4460 Rev. 1.03 www.MonolithicPower.com 2 2/27/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2014 MPS. All Rights Reserved.