MP4581GN-Z

MP4581 100V, 0.8A Synchronous Buck Converter PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE FEATURES DESCRIPTION The MP4581 is a high efficiency synchronous step-down converter with integrated high-side and low-side MOSFETs. It provides 0.8A output in buck topology from up to 100V input power supply. The MP4581 adopts constant-on-time (COT) control mode that provides fast transient response and facilitates loop stabilization. Operation frequency can be programmed easily from 100kHz to 1MHz by an external resistor. MP4581 supports high efficiency pulse-skipmode (PSM) in light load condition. Valley current limit circuits protect against overload and short circuit conditions. The MP4581 is available in a SOIC8EP packages.           10V-to-100V Input Voltage Range 1V-to-30V Output Voltage Range 90% Maximum Operation Duty Cycle 625mΩ / 380mΩ Internal MSOFETs Constant On Time Control Mode Programmable 100kHz to 1MHz Frequency Internal Soft-Start and Loop Compensation OCP, SCP with Hiccup High Efficiency PSM in Light Load Available in SOIC8EP Package APPLICATIONS    E-bike GPS Tracker Industrial Power Supplies Printer Power Board All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For MPS green status, please visit the MPS website under Quality Assurance. “MPS”, the MPS logo, and “Simple, Easy Solutions” are registered trademarks of Monolithic Power Systems, Inc. or its subsidiaries. TYPICAL APPLICATION Efficiency VOUT=5V 100 VIN C1 2.2μF C3 0.1μF L1 33μH 90 VOUT SW On/Off EN MP4581 R1 40.2kΩ VCC C4 1μF FB R2 10kΩ FREQ R3 80.6kΩ C5 680pF 5V/0.8A C2 10μF x 2 EFFICIENCY (%) BST VIN 10V-100V 80 70 60 Vin=12V Vin=48V Vin=72V GND 50 40 0 0.2 0.4 0.6 0.8 OUTPUT CURRENT (A) MP4581 Rev. 0.8 www.MonolithicPower.com 3/16/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2020 MPS. All Rights Reserved. 1 MP4581 – 100V, 0.8A BUCK CONVERTER PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE ORDERING INFORMATION Part Number MP4581GN Package SOIC8EP Top Marking See Below * For Tape & Reel, add suffix –Z (e.g. MP4581GN–Z). TOP MARKING MP4581: part number MPS: MPS prefix Y: year code WW: week code LLLLLLLL: lot number PACKAGE REFERENCE TOP VIEW SOIC8EP MP4581 Rev. 0.8 www.MonolithicPower.com 3/16/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2020 MPS. All Rights Reserved. 2