MPQ4570 3A, 4.5V-55V Input, Frequency Programmable, Fully Integrated Synchronous, Step-Down Converter AEC-Q100 Qualified DESCRIPTION FEATURES The MPQ4570 is a frequency programmable Wide Input Voltage Range: 4.5V to 55V step-down switching converter with integrated 90m and 70m Internal High and Low internal high-side and low side power MOSFETs. Power MOSFETs It can provide 3A continuous output current with Peak Current Mode Control peak current control for excellent transient Programmable Switching Frequency response and efficiency performance. Stable Independent on Output Capacitors Optional External Soft Start The wide 4.5V to 55V input voltage range OCP Protection with Valley Current accommodates a variety of step down applications, including those applications in Detection industrial, PoE, automotive and printer with DC Support External SYNC Clock high voltage bus. OVP Protection Current Limit Decreasing during Output The MPQ4570 uses peak current mode control to Short for Better Thermal Performance regulate the output voltage. The chip provides Power Good Indication over current protection with valley current Thermal Shutdown Protection detection which is used to avoid current running Available in a TSSOP-20 EP Package. way. Also it has accurate and reliable over Available in AEC-Q100 Grade 1 voltage protection, and auto recovery thermal protection. In addition, the optional external soft APPLICATIONS start is available. Enable and power good PoE Input Non-isolated Buck indication function can be used to power track easily. In order to increase the efficiency, Industrial Power Systems MPQ4570 will automatically scaling down the Printers and Scanners switching frequency when load is light. Automotive Power Systems Meanwhile, the low side MOSFET will be turned Distributed Power Systems off to reduce driver loss when zero inductor All MPS parts are lead-free and adhere to the RoHS directive. For MPS green current is detected. MPQ4570 also features as status, please visit MPS website under Quality Assurance. MPS and The Future of Analog IC Technology are Registered Trademarks of Monolithic a fully integrated solution with both high side Power Systems, Inc. and low side power MOSFETs. Synchronous operation mode with integrated low side MOSFET is much helpful to reduce the conduction loss and also beneficial to reduce external components space and save the cost. The MPQ4570 is available in a TSSOP-20 EP with exposed pad package. MPQ4570 Rev. 1.05 www.MonolithicPower.com 1 4/22/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2019 MPS. All Rights Reserved. MPQ4570 3A, 55V, SYNCHRONOUS STEP DOWN CONVERTER TYPICAL APPLICATION L1 VIN SW C1 C2 OFF ON EN BST R1 C3 R5 MPQ4570 PG VDD FB FREQ R2 BIAS 5V EX or NC R4 COMP SS R3 VDD GND C4 C6 C5 MPQ4570 Rev. 1.05 www.MonolithicPower.com 2 4/22/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2019 MPS. All Rights Reserved.