MP4558 1A, 2MHz, 55V Step-Down Converter DESCRIPTION FEATURES The MP4558 is a high-frequency, step-down Wide 3.8V-to-55V Operating Input Range switching regulator with an integrated internal 250m Internal Power MOSFET high-side high-voltage power MOSFET. It Up to 2MHz Programmable Switching provides up to a 1A output with current-mode Frequency control for fast loop response and easy 140A Quiescent Current compensation. Stable with Ceramic Capacitors Internal Soft-Start The wide 3.8V-to-55V input range accommodates Up to 95% Efficiency a variety of step-down applications, including automotive input. A 12A shutdown-mode supply Output Adjustable from 0.8V to 52V current makes it suitable for battery-powered Available in SOIC8E and 3mm x 3mm applications. QFN10 Packages A scaled-down switching frequency in light-load APPLICATIONS conditions provides high power-conversion High-Voltage Power Conversion efficiency over a wide load range while reducing Automotive Systems switching and gate driver losses. Industrial Power Systems The frequency fold-back prevents inductor current Distributed Power Systems runaway during startup and thermal shutdown Battery Powered Systems provides reliable, fault-tolerant 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 MP4558 can prevent page. 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 MP4558 is available in an SOIC8E and a 10- pin 3mm x 3mm QFN package. TYPICAL APPLICATION MP4558 Rev. 1.01 www.MonolithicPower.com 1 10/28/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2013 MPS. All Rights Reserved. MP4558 1A, 2MHz, 55V STEP-DOWN CONVERTER ORDERING INFORMATION Part Number Package Top Marking MP4558DN MP4558DN* SOIC8E LLLLLLLL MPSYWW ABPY MP4558DQ** QFN10 (3 x 3mm) LLL * For Tape & Reel, add suffix Z (e.g. MP4558DNZ) For RoHS Compliant Packaging, add suffix LF, (e.g. MP4558DNLFZ) ** For Tape & Reel, add suffix Z (e.g. MP4558DQZ) For RoHS Compliant Packaging, add suffix LF, (e.g. MP4558DQLFZ) PACKAGE REFERENCE SOIC8 (Exposed Pad) QFN10(3mm x 3mm) (4) (1) Thermal Resistance ABSOLUTE MAXIMUM RATINGS JA JC SOIC8 (Exposed Pad) ............ 50 ...... 10 ... C/W Supply Voltage (V ) .................... 0.3V to +60V IN QFN10 (3mm x 3mm) ............. 50 ...... 12 ... C/W Switch Voltage (V ) ......... 0.5V to (V + 0.5V) SW IN BST to SW .................................... 0.3V to +5V Notes: All Other Pins ................................ 0.3V to +5V 1) Exceeding these ratings may damage the device (2) 2) The maximum allowable power dissipation is a function of the Continuous Power Dissipation (T = +25C) J maximum junction temperature T (MAX), the junction-to- J SOIC8E.2.5W ambient thermal resistance , and the ambient temperature JA TA. The maximum allowable continuous power dissipation at QFN10. 2.5W 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) Recommended Operating Conditions 3) The device is not guaranteed to function outside of its operating conditions. Supply Voltage V .......................... 3.8V to 55V IN 4) Measured on JESD51-7 4-layer board. Output Voltage V ........................ 0.8V to 52V OUT Operating Junction Temp. (T ). -40C to +125C J MP4558 Rev. 1.01 www.MonolithicPower.com 2 10/28/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2013 MPS. All Rights Reserved.