RT6204GSP your power partner. Evaluation Board 500mA, 60V, 350kHz Synchronous Step-Down Converter Purpose The RT6204 is a 60V, 500mA, 350kHz, high-efficiency, synchronous step-down DC-DC converter with an input-voltage range of 5.2V to 60V and a programmable output-voltage range of 0.8V to 50V. This document explains the function and usage of the RT6204GSP evaluation board (EVB), and provides information for power-up operation, and the modification of the evaluation board and the circuit, to be suitable for individual requirements. Table of Contents Purpose ................................................................................................................................................................. 1 Table of Contents ................................................................................................................................................... 1 Introduction ............................................................................................................................................................ 2 Key Performance Summary Table .......................................................................................................................... 2 Bench Test Setup Conditions ................................................................................................................................. 3 Schematic, Bill of Materials, & Board Layout .......................................................................................................... 5 More Information.................................................................................................................................................... 7 Important Notice for Richtek Evaluation Board ....................................................................................................... 7 EVB RT6204GSP-00 July 2016 1 RT6204GSP your power partner. Evaluation Board Introduction General Product Information The RT6204 is a 60V, 500mA, 350kHz, high-efficiency, synchronous step-down DC-DC converter with an input-voltage range of 5.2V to 60V and a programmable output-voltage range of 0.8V to 50V. It features current-mode control to simplify external compensation and to optimize transient response with a wide range of inductors and output capacitors. High efficiency can be achieved through integrated N-MOSFETs, and pulse-skipping mode at light loads. With EN pin, power-up sequence can be more flexible and shutdown quiescent current can be reduced to <3A. The RT6204 features cycle-by-cycle current limit for over-current protection against short-circuit outputs, and user-programmable soft-start time to prevent inrush current during startup. It also includes input under-voltage lockout, output under-voltage, and thermal shutdown protection to provide safe and smooth operation in all operating conditions. The RT6204 is available in the SOP-8 (Exposed pad) package. Product Features 0.8V Feedback Reference Voltage with 1.5% Accuracy Wide Input Voltage Range : 5.2V to 60V Output Current : 500mA Integrated N-MOSFETs Current-Mode Control Fixed Switching Frequency : 350kHz Programmable Output Voltage : 0.8V to 50V Low <3A Shutdown Quiescent Current Up to 92% Efficiency Pulse-Skipping Mode for Light-Load Efficiency Programmable Soft-Start Time Cycle-by-Cycle Current Limit Protection Input Under-Voltage Lockout, Output Under-Voltage and Thermal Shutdown Protection Key Performance Summary Table Key Features Evaluation Board Number : PCB073 V2 Input Voltage Range 5.2V to 60V Max Output Current 500mA Default Output Voltage 5V Default Marking & Package Type RT6204GSP, SOP-8 (Exposed pad) Operation Frequency Fixed 350kHz EVB RT6204GSP-00 July 2016 2