MPQ4423 High Efficiency 3A, 36V, Synchronous Step Down Converter AEC-Q100 Qualified The Future of Analog IC Technology DESCRIPTION FEATURES The MPQ4423 is a high-frequency, Wide 4V to 30V Continuous Operating Input synchronous, rectified, step-down, switch-mode Range converter with built-in power MOSFETs. It 36V Input Transient Tolerance for offers a very compact solution to achieve a 3A Automotive Load Dump continuous output current with excellent load 85m /55m Low R Internal Power DS(ON) and line regulation over a wide input supply MOSFETs range. The MPQ4423 has synchronous mode High-Efficiency Synchronous Mode operation for higher efficiency over the output Operation current load 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 MPQ4423 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) Available in AEC-Q100 Grade 1 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 BST VIN IN C1 R4 MPQ4423 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 MPQ4423 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. MPQ4423 36V, 3A SYNCHRONOUS STEP-DOWN CONVERTER ORDERING INFORMATION Part Number* Package Top Marking MPQ4423GQ QFN-8 (3mmx3mm) See Below MPQ4423GQ-AEC1 QFN-8 (3mmx3mm) * For Tape & Reel, add suffix -Z (e.g. MPQ4423GQ-Z) TOP MARKING AJV: product code of MPQ4423GQ and MPQ4423GQ-AEC1 Y: year code LLL: lot number PACKAGE REFERENCE TOP VIEW 1 8 FB PG 2 7 VCC IN 3 6 EN/SYNC SW 45 BST GND QFN8 (3mmx3mm) MPQ4423 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.