MPQ4460 Industrial Grade, 2.5A, 4MHz, 36V Step-Down Converter The Future of Analog IC Technology DESCRIPTION FEATURES The MPQ4460 is a high frequency step-down Guaranteed Industrial Temp Range Limits switching regulator with an integrated internal 120 A Quiescent Current high-side high voltage power MOSFET. It Wide 3.8V to 36V Operating Input Range provides 2.5A output with current mode control 150m Internal Power MOSFET for fast loop response and easy compensation. Up to 4MHz Programmable Switching The wide 3.8V to 36V input range Frequency accommodates a variety of step-down Ceramic Capacitor Stable applications, including those in an automotive Internal Soft-Start input environment. A 120A operational Internally Set Current Limit without a quiescent current allows use in battery-powered Current Sensing Resistor applications. Up to 95% Efficiency High power conversion efficiency over a wide Output Adjustable from 0.8V to 30V load range is achieved by scaling down the Available in a 3mm x 3mm QFN10 Package 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 By switching at 4MHz, the MPQ4460 is able to All MPS parts are lead-free and adhere to the RoHS directive. For MPS green prevent EMI (Electromagnetic Interference) status, please visit MPS website under Quality Assurance. MPS and The noise problems, such as those found in AM Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. radio and ADSL applications. The MPQ4460 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 MPQ4460 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) MPQ4460 Rev1.22 www.MonolithicPower.com 1 1/24/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2014 MPS. All Rights Reserved. EFFICIENCY (%)MPQ4460 INDUSTRIAL GRADE 2.5A, 4MHz, 36V STEP-DOWN CONVERTER ORDERING INFORMATION Part Number* Package Top Marking MPQ4460DQ QFN10 (3x3) M7 * For Tape & Reel, add suffix Z (e.g. MPQ4460DQZ) For Lead Free, add suffix LF (e.g. MPQ4460DQLFZ) 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 .............................................................2.5W T . The maximum allowable continuous power dissipation at A any ambient temperature is calculated by P (MAX)=(T (MAX - D J ) Junction Temperature...............................150C T )/ . Exceeding the maximum allowable power dissipation A JA Lead Temperature ....................................260C will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry Storage Temperature.............. 65C to +150C protects the device from permanent damage. (3) 3) The device is not guaranteed to function outside of its Recommended Operating Conditions operating conditions. Supply Voltage V ...........................3.8V to 36V IN 4) Measured on JESD51-7, 4-layer PCB Output Voltage V .........................0.8V to 30V OUT Operating Junct. Temp (T )..... 40 C to +125 C J MPQ4460 Rev1.22 www.MonolithicPower.com 2 1/24/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2014 MPS. All Rights Reserved.