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RT7285CGJ6

Evaluation Board

UG7285CGJ6-00 January 2015

9

http://www.richtek.com

your power partner.

PCB Layout

—Bottom Side (4

th

layer)

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Summary of Contents for RT7285CGJ6

Page 1: ...om 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 LA...

Page 2: ...nt 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 ...

Page 3: ...t voltage 1 2V Output voltage range 0 6V to 8V see Output Voltage Setting section for changing output voltage level SW Switching node test point SW waveform EN Enable test point Enable signal Drive EN or install a shorting block on Jumper JP2 to enable operation or disable operation JP2 Chip enable control Install jumper or drive EN directly to enable or disable operation BOOT Boot strap supply te...

Page 4: ...s set by the following formula The installed VOUT capacitors C9 C10 are 22μF 16V X5R ceramic types Do not exceed their operating voltage range and consider their voltage coefficient capacitance vs bias voltage and ensure that the capacitance is sufficient to maintain stability and provide sufficient transient response for your application This can be verified by checking the output transient respo...

Page 5: ...anuary 2015 5 http www richtek com your power partner Schematic Bill of Materials Board Layout EVB Schematic Diagram C3 C4 10μF 50V X5R 1206 TDK C3216X5R1H106K C9 C10 22μF 16V X5R 1210 Murata GRM32ER61C226K L1 2μH TAIYO YUDEN NR8040T2R0N DCR 9mΩ ...

Page 6: ...apacitor 1206 TDK C9 C10 2 GRM32ER61C226KE20 22μF 10 16V X5R Ceramic Capacitor 1210 Murata C6 C8 C12 3 C1608X7R1H104K080AA 0 1μF 10 50V X7R Ceramic Capacitor 0603 TDK C1 C11 D2 0 Not Installed 0603 L1 1 NR8040T2R0N 2 0μH 7 4A 30 DCR 9mΩ Inductor 8mmx8mmx4mm TAIYO YUDEN R2 1 10kΩ 1 Resistor 0603 R3 1 10kΩ 1 Resistor 0603 R5 1 100kΩ 1 Resistor 0603 CP1 1 Short JP2 J5 2 3 Pin Header GP 4 EN B E BOOT ...

Page 7: ...RT7285CGJ6 Evaluation Board UG7285CGJ6 00 January 2015 7 http www richtek com your power partner EVB Layout Top View 1 st layer Bottom View 4 th Layer ...

Page 8: ...RT7285CGJ6 Evaluation Board UG7285CGJ6 00 January 2015 8 http www richtek com your power partner Component Placement Guide Component Side 1 st layer PCB Layout Component Side 1 st Layer ...

Page 9: ...RT7285CGJ6 Evaluation Board UG7285CGJ6 00 January 2015 9 http www richtek com your power partner PCB Layout Bottom Side 4 th layer ...

Page 10: ...htek com Important Notice for Richtek Evaluation Board THIS DOCUMENT IS FOR REFERENCE ONLY NOTHING CONTAINED IN THIS DOCUMENT SHALL BE CONSTRUED AS RICHTEK S WARRANTY EXPRESS OR IMPLIED UNDER CONTRACT TORT OR STATUTORY WITH RESPECT TO THE PRESENTATION HEREIN IN NO EVENT SHALL RICHTEK BE LIABLE TO BUYER OR USER FOR ANY AND ALL DAMAGES INCLUDING WITHOUT LIMITATION TO DIRECT INDIRECT SPECIAL PUNITIVE...

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