MP4423 High Efficiency 3A, 36V, Synchronous Step Down Converter The Future of Analog IC Technology DESCRIPTION FEATURES The MP4423 is a high-frequency, synchronous, Wide 4V to 30V Continuous Operating Input rectified, step-down, switch-mode converter Range with built-in power MOSFETs. It offers a very 36V Input Transient Tolerance for compact solution to achieve a 3A continuous Automotive Load Dump output current with excellent load and line 85m /55m Low R Internal Power DS(ON) regulation over a wide input supply range. The MOSFETs MP4423 has synchronous mode operation for High-Efficiency Synchronous Mode higher efficiency over the output current load Operation range. Default 410kHz Switching Frequency Synchronizes to a 200kHz to 2.2MHz Current-mode operation provides fast transient External Clock response and eases loop stabilization. High Duty Cycle for Automotive Cold-crank Full protection features include over-current Power-Save Mode protection and thermal shut down. Internal Soft-Start The MP4423 requires a minimal number of Power Good readily-available standard external components, OCP Protection and Hiccup and is available in a space-saving QFN-8 Thermal Shutdown (3mmx3mm) package. Output Adjustable from 0.8V Available in an QFN-8 (3mmx3mm) package APPLICATIONS Automotive Industrial Control System Distributed Power Systems 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 c Future of Analog IC Technology are Registered Trademarks of Monolithi Power Systems, Inc. TYPICAL APPLICATION BST VIN IN C1 R4 MP4423 20 22 F C4 100nF L1 3.3V/3A SW VOUT EN/SYNC EN/SYNC 10 H C2 47 F PG R3 R1 51k 41.2k VCC FB GND C3 R2 0.1 F 13k MP4423 Rev. 1.0 www.MonolithicPower.com 1 8/18/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2014 MPS. All Rights Reserved. MP4423 36V, 3A SYNCHRONOUS STEP-DOWN CONVERTER ORDERING INFORMATION Part Number* Package Top Marking See Below MP4423GQ QFN-8 (3mmx3mm) For Tape & Reel, add suffix -Z (e.g. MP4423GQ-Z) TOP MARKING AJV: product code of MP4423GQ Y: year code LLL: lot number PACKAGE REFERENCE TOP VIEW 1 8 FB PG 2 7 VCC IN 3 6 EN/SYNC SW BST45 GND QFN8 (3mmx3mm) MP4423 Rev. 1.0 www.MonolithicPower.com 2 8/18/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2014 MPS. All Rights Reserved.