MP4559 1.5A, 2MHz, 55V Step-Down Converter The Future of Analog IC Technology DESCRIPTION FEATURES The MP4559 is a high frequency step-down Wide 3.8V to 55V Operating Input Range switching regulator with integrated internal high- 250m Internal Power MOSFET side high voltage power MOSFET. It provides Up to 2MHz Programmable Switching 1.5A output with current mode control for fast loop Frequency response and easy compensation. 140 A Quiescent Current Ceramic Capacitor Stable The wide 3.8V to 55V input range accommodates Internal Soft-Start a variety of step-down applications, including Up to 95% Efficiency those in automotive input environment. A 12A shutdown mode supply current allows use in Output Adjustable from 0.8V to 52V battery-powered applications. Available in QFN (3mm x 3mm) and SOIC8E with Exposed Pad Packages High power conversion efficiency over a wide load range is achieved by scaling down the APPLICATIONS switching frequency at light load condition to High Voltage Power Conversion reduce the switching and gate driving losses. Automotive Systems The frequency foldback helps prevent inductor Industrial Power Systems current runaway during startup and thermal Distributed Power Systems shutdown provides reliable, fault tolerant Battery Powered Systems operation. All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit the MPS website under Products, Quality Assurance By switching at 2MHz, the MP4559 is able to page. prevent EMI (Electromagnetic Interference) noise MPS and The Future of Analog IC Technology are registered trademarks of problems, such as those found in AM radio and Monolithic Power Systems, Inc. ADSL applications. The MP4559 is available in small 3mm x 3mm QFN10 and SOIC8 with exposed pad packages. TYPICAL APPLICATION Efficiency V =3.3V OUT fs=500kHz 100 Vin=12V 90 80 70 60 Vin=55V 50 40 30 20 10 0 0 0.5 1 1.5 OUTPUT CURRENT (A) MP4559 Rev. 1.01 www.MonolithicPower.com 1 12/23/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2013 MPS. All Rights Reserved. EFFICIENCY (%)MP4559 1.5A, 2MHz, 55V STEP-DOWN CONVERTER ORDERING INFORMATION Part Number Package Top Marking MP4559DN MP4559DN* SOIC8E LLLLLLLL MPSYWW ADDY MP4559DQ** QFN10 (3X3mm) LLL * For Tape & Reel, add suffix Z (e.g. MP4559DNZ) For RoHS Compliant Packaging, add suffix LF (e.g. MP4559DNLFZ) ** For Tape & Reel, add suffix Z (e.g. MP4559DQZ) For RoHS Compliant Packaging, add suffix LF (e.g. MP4559DQLFZ) PACKAGE REFERENCE TOP VIEW TOP VIEW SW 1 10 BST SW 1 8 BST SW 2 9 VIN EN 2 7 VIN EN 3 8 VIN COMP 3 6 FREQ COMP 4 7 FREQ FB 4 5 GND FB 5 6 GND EXPOSED PAD EXPOSED PAD QFN10 SOIC8E (1) (4) ABSOLUTE MAXIMUM RATINGS Thermal Resistance JA JC Supply Voltage (V ).....................0.3V to +60V SOIC8E...................................50 ...... 10... C/W IN Switch Voltage (V )............ 0.5V to V + 0.5V SW IN QFN10 (3X3mm)5012 C/W BST to SW .....................................0.3V to +5V Notes: All Other Pins.................................0.3V to +5V 1) Exceeding these ratings may damage the device (2) Continuous Power Dissipation (T = +25C) A 2) The maximum allowable power dissipation is a function of the SOIC8E.2.5W maximum junction temperature T(MAX), the junction-to- J ambient thermal resistance , and the ambient temperature JA QFN10 (3X3mm).2.5W TA. The maximum allowable continuous power dissipation at Junction Temperature...............................150C any ambient temperature is calculated by P (MAX)=(T (MAX)- D J T )/ . Exceeding the maximum allowable power dissipation A JA Lead Temperature ....................................260C will cause excessive die temperature, and the regulator will go Storage Temperature.............. 65C to +150C into thermal shutdown. Internal thermal shutdown circuitry (3) protects the device from permanent damage. Recommended Operating Conditions 3) The device is not guaranteed to function outside of its Supply Voltage V ...........................3.8V to 55V operating conditions. IN 4) Measured on JESD51-7 4-layer board. Output Voltage V .........................0.8V to 52V OUT Operating Junct. Temp (T )..... 40 C to +125 C J MP4559 Rev. 1.01 www.MonolithicPower.com 2 12/23/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2013 MPS. All Rights Reserved.