MPQ4456 Industrial Grade ,1A, 4MHz, 36V Step-Down Converter The Future of Analog IC Technology FEATURES DESCRIPTION Guaranteed Industrial Temp Range The MPQ4456 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 300m Internal Power MOSFET provides 1 A output with current mode control Up to 4MHz Programmable Switching for fast loop response and easy compensation. Frequency The wide 3.8V to 36V input range Ceramic Capacitor Stable accommodates a variety of step-down Internal Soft-Start applications, including those in automotive Extended PWM Operation Reduces Noise systems. A 120A operational quiescent current Up to 95% Efficiency is suitable for use in battery-powered Output Adjustable from 0.8V to 36V applications. Available in 10-Pin 3x3 TQFN Package Special controlled circuitry allows the MPQ4456 APPLICATIONS to maintain PWM operation at low output currents. This lowers noise by reducing the High Voltage Power Conversion pulse skipping. Automotive Systems Industrial Power Systems By switching at 4MHz, the MPQ4456 prevents EMI (Electromagnetic Interference) noise Distributed Power Systems problems, such as those found in AM radio and Battery Powered Systems ADSL applications. 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 The MPQ4456 is available in thin 10-pin 3mm x 3mm Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. TQFN package. TYPICAL APPLICATION Efficiency vs Load Current 100 V =5V I C3 90 150pF 4 8, 9 COMP VIN V IN 80 36V Max V =24V I 3 10 V =12V 70 I CONTROL EN BST C4 MPQ4456 100nF 60 7 1, 2 FREQ SW V OUT 50 5V 1A 10MQ100N 5 6 FB GND 40 V =3.3V 30 O 20 0 500 1000 LOAD CURRENT (mA) MPQ4456 Rev. 1.01 www.MonolithicPower.com 1 1/27/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2014 MPS. All Rights Reserved. EFFICIENCY (%)MPQ4456 INDUSTRIAL GRADE, 1A, 4MHz, 36V STEP-DOWN CONVERTER ORDERING INFORMATION Part Number* Package Top Marking TQFN10 (3mm x3mm) MPQ4456GQT AFD * For Tape & Reel, add suffix Z (e.g. MPQ4456GQTZ). 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 TQFN10 (3mm x3mm)............ 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 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 operating conditions. Supply Voltage V ...........................3.8V to 36V IN 4) Measured on JESD51-7 4-layer board. Output Voltage V .........................0.8V to 36V OUT Operating Junct. Temp (T )..... 40 C to +125 C J MPQ4456 Rev. 1.01 www.MonolithicPower.com 2 1/27/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2014 MPS. All Rights Reserved.