EVB_RT7285CGJ6 Richtek

RT7285CGJ6 your power partner. Evaluation Board RT7285CGJ6 Evaluation Board Purpose The RT7285C is a synchronous step-down converter with Advanced Constant On-Time (ACOT) mode control. It can deliver up to 1.5A output current from a wide input voltage range of 4.3V to 18V. This document explains the function and use of the RT7285C evaluation board (EVB) and provides information to enable operation and 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 AND BOARD LAYOUT ........................................................................................................... 5 MORE INFORMATION........................................................................................................................................................... 10 IMPORTANT NOTICE FOR RICHTEK REFERENCE DESIGNS ...................................................................................................... 10 UG7285CGJ6-00 January 2015 1 RT7285CGJ6 your power partner. Evaluation Board Introduction General Product Information The RT7285C is a synchronous step-down converter with Advanced Constant On-Time (ACOT) mode control. The ACOT provides a very fast transient response with few external components. The low impedance internal MOSFET supports high efficiency operation with wide input voltage range from 4.3V to 18V. The proprietary circuit of the RT7285C enables to support all ceramic capacitors. The output voltage can be adjusted between 0.6V and 8V. The RT7285C also provides output under voltage protection and thermal shutdown protection. The low current (<4A) shutdown mode provides output disconnection, enabling easy power management in battery-powered systems. The RT7285C is available in TSOT-23-6 package. Product Feature 1.5% High Accuracy Feedback Voltage 4.3V to 18V Input Voltage Range 1.5A Output Current Integrated N-MOSFET Switches ACOTTM mode control Fixed Frequency Operation : 500kHz Output Adjustable from 0.6V to 8V Up to 95% Efficiency Fast Transient Response Stable with Low-ESR Ceramic Output Capacitors Cycle-by-Cycle Over Current Protection Input Under Voltage Lockout Output Under Voltage Protection Thermal Shutdown Protection RoHS Compliant and Halogen Free Key Performance Summary Table Key Features Evaluation Board Number: PCB007 V1 Default Input Voltage 12V Max Output Current 1.5A Default Output Voltage 1.2V Default Marking & Package Type RT7285CGJ6, TSOT-23-6 Operation Frequency Steady 500kHz at all loads TM Other Key Features ACOT for Fast Transient Response Protection Output Under-Voltage Protection (hiccup mode): Cycle-by-cycle Current Limit Thermal Shutdown UG7285CGJ6-00 January 2015 2