EVB_RT7249GQW

RT7249GQW Evaluation Board your power partner. 3A, 18V Synchronous Step-Down Converter with Adjustable Current Limited Power Switch Purpose The RT7249 is a current mode step-down converter with the input voltage range from 4.5V to 18V and provides 3A outputcurrent. This document explains the function and use of the RT7249 evaluation board (EVB), and provides information to enable operation, modification of the evaluation board and circuit to suit individual requirements. Table of Contents Purpose ................................................................................................................................................................. 1 Introduction............................................................................................................................................................ 2 Key Performance Summary Table .......................................................................................................................... 2 Bench Test Setup Conditions ................................................................................................................................. 3 Schematic, Bill of Materials & Board Layout ........................................................................................................... 5 More Information.................................................................................................................................................... 9 Important Notice for Richtek Evaluation Board ....................................................................................................... 9 EVB_RT7249GQW-00 April 2016 1 http://www.richtek.com RT7249GQW Evaluation Board your power partner. Introduction General Product Information The RT7249 is a high efficiency, monolithic synchronous step-down DC/DC converter with a power switch.The buck converter can deliver up to 3A output current from 4.5V to 18V input supply. The RT7249’s current-mode architecture and external compensation allow the transient response to be optimized over a wide input range and loads. Cycle-by-cycle current limit provides protection against shorted output and soft-start eliminates input current surge during start-up. The RT7249 also provides under-voltage protection and thermal shutdown. PWM frequency is adjustable by the ROSC pin and Power Switch current limit can also be adjusted by the RLIM pin. The low current (