MP4423H High Efficiency 3A, 36V, Synchronous Step Down Converter The Future of Analog IC Technology DESCRIPTION FEATURES The MP4423H is a high-frequency, Wide 4V to 36V Continuous Operating Input synchronous, rectified, step-down, switch-mode Range converter with built-in power MOSFETs. It 85m /55m Low R Internal Power DS(ON) offers a very compact solution to achieve a 3A MOSFETs continuous output current with excellent load High-Efficiency Synchronous Mode and line regulation over a wide input supply Operation range. The MP4423H has synchronous mode Default 410kHz Switching Frequency operation for higher efficiency over the output Synchronizes to a 200kHz to 2.2MHz current load range. External Clock High Duty Cycle for Automotive Cold-crank Current-mode operation provides fast transient Power-Save Mode response and eases loop stabilization. Internal Soft-Start Full protection features include over-current Power Good protection and thermal shut down. OCP Protection and Hiccup The MP4423H requires a minimal number of Thermal Shutdown readily-available standard external components, Output Adjustable from 0.8V and is available in a space-saving QFN-8 Available in an QFN-8 (3mmx3mm) (3mmx3mm) package. 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 Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION MP4423H 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. MP4423H 36V, 3A SYNCHRONOUS STEP-DOWN CONVERTER ORDERING INFORMATION Part Number* Package Top Marking See Below MP4423HGQ QFN-8 (3mmx3mm) * For Tape & Reel, add suffix Z (e.g. MP4423HGQZ) TOP MARKING ALN: product code of MP4423HGQ Y: year code LLL: lot number PACKAGE REFERENCE TOP VIEW 1 8 FB PG 2 VCC 7 IN 3 6 EN/SYNC SW 45 BST GND QFN-8 (3mmx3mm) MP4423H 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.