MP9473 High-Efficiency, Fast-Transient, 3.5A, 36V Synchronous, Step-Down Converter The Future of Analog IC Technology DESCRIPTION FEATURES The MP9473 is a fully integrated, high- Wide 4.5V-to-36V Operating Input Range frequency, synchronous, rectified, step-down, Guaranteed 3.5A, Continuous Output switch-mode converter. It offers a compact Current solution to achieve a 3.5A, continuous-output Internal 40m High-Side, 20m Low-Side current over a wide input-supply range with Power MOSFETs excellent load and line regulation. It provides Proprietary Switching-Loss-Reduction fast, transient response and good stability for Technology wide input-supply and load range. The MP9473 1% Reference Voltage operates at high efficiency over a wide-output- Programmable Soft-Start Time current load range. Low Drop-Out Mode MP9473 has full protection features including, 200kHz-to-1MHz Switching Frequency short-circuit protection (SCP), over-current SCP, OCP, UVP, and Thermal Shutdown protection (OCP), under-voltage protection Output Adjustable from 0.8V to 0.9V IN (UVP), and thermal shutdown (TSD). Available in a 3mmx4mm, 20-pin, QFN Package The MP9473 requires minimal, readily available, standard, external components, and is available APPLICATIONS in a compact 3mmx4mm, 20-pin, QFN package. Notebook Systems and I/O Power Automotive Systems Networking Systems Industrial Supplies Optical Communications Systems Distributed Power and POL Systems All MPS parts are lead-free, halogen 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 8,19,21,22,23 100 V 7 IN IN BST C3 90 C1 10F 0.1F L1 V 3.3V MP9473 OUT 80 2 SW 5.6H FREQ 9,10,17,18,24,25 C4 70 20 R4 R5 R3 VCC R1 C2 499k 63.4k C5 31.6k 60 2x22F 620k 390pF 1F 50 6 PGOOD 3 5 EN EN 40 FB R2 30 SS AGND PGND 10k 20 4 1 11-16 C6 10 33nF 0 0.01 0.1 1 10 MP9473 Rev. 1.1 www.MonolithicPower.com 1 8/1/2016 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2016 MPS. All Rights Reserved. MP9473HIGH-EFFICIENCY, FAST-TRANSIENT, SYNCHRONOUS, STEP-DOWN CONVERTER ORDERING INFORMATION Part Number* Package Top Marking MP9473GL QFN-20 (3mmx4mm) See below * For Tape & Reel, add suffix Z (e.g. MP9473GLZ) TOP MARKING MP: MPS prefix: Y: year code W: week code: 9473: first four digits of the part number LLL: lot number PACKAGE REFERENCE 20 19 18 17 1 16 21 IN 2 15 24 SW 3 14 22 IN 4 13 25 SW 5 12 23 IN 6 11 78 910 QFN20 (3mm4mm) MP9473 Rev. 1.1 www.MonolithicPower.com 2 8/1/2016 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2016 MPS. All Rights Reserved.