MP4575 5A, 4.5V - 55V Input, Frequency-Programmable, Fully Integrated, Synchronous, Step-Down Converter DESCRIPTION FEATURES The MP4575 is a frequency-programmable, Wide 4.5V to 55V Input Voltage Range step-down, switching converter with integrated, 90m and 70m Internal High-Side and internal, high-side and low-side power Low-Side Power MOSFETs MOSFETs. The MP4575 can provide 5A of Peak-Current-Mode Control continuous output current with peak current Programmable Switching Frequency control for excellent transient response and Optional External Soft Start efficiency performance. Over-Current Protection (OCP) with Valley Current Detection The wide 4.5V to 55V input voltage range accommodates a variety of step-down Supports External Synchronous Clock applications, including industrial, PoE, Over-Voltage Protection (OVP) automotive, and printers with a DC high-voltage Current Limit Decreases during Output bus. Short for Better Thermal Performance Power Good Indication The MP4575 uses peak-current-mode control to Thermal Shutdown Protection regulate the output voltage. The MP4575 Available in a TSSOP-20 EP Package provides over-current protection (OCP) with valley current detection, which is used to APPLICATIONS prevent the current from running away. The PoE Input Non-Isolated Buck MP4575 also has accurate and reliable over- Industrial Power Systems voltage protection (OVP) and auto-recovery Printers and Scanners thermal protection. Automotive Power Systems An optional external soft start is available. Distributed Power Systems Enable and power good indication functions can All MPS parts are lead-free, halogen-free, and adhere to the RoHS be used to track the power easily. To increase directive. For MPS green status, please visit the MPS website under efficiency, the MP4575 scales down the Quality Assurance. MPS and The Future of Analog IC Technology are registered trademarks of Monolithic Power Systems, Inc. switching frequency automatically when the load is light. Meanwhile, the low-side MOSFET is turned off to reduce driver loss when zero inductor current is detected. Synchronous operation mode with the integrated low-side MOSFET is useful for reducing conduction loss and reducing external components space to save cost. The MP4575 is available in a TSSOP-20 EP package with an exposed pad. MP4575 Rev. 1.0 www.MonolithicPower.com 1 8/16/2016 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2016 MPS. All Rights Reserved. MP4575 5A, 55V, SYNCHRONOUS, STEP-DOWN CONVERTER TYPICAL APPLICATION L1 VIN SW C1 C2 EN BST OFF ON R1 R5 C6 MP4575 PG VDD FB FREQ R2 BIAS 5V EX or NC R4 COMP SS R3 VDD GND C7 C4 C3 C5 MP4575 Rev. 1.0 www.MonolithicPower.com 2 8/16/2016 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2016 MPS. All Rights Reserved.