RT9074-33GSP Evaluation Board your power partner. 60V, 30µA IQ, Low Dropout Voltage Linear Regulator Purpose The RT9074 is a high input-voltage linear regulator specifically designed to minimize external components. The input voltage range is from 4.5V to 60V. The device supplies 100mA of output current with a maximum dropout voltage of 300mV. This document explains the function and use of the RT9074-33GSP 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 & Board Layout ........................................................................................................... 4 More Information.................................................................................................................................................... 6 Important Notice for Richtek Evaluation Board ....................................................................................................... 6 EVB_RT9074-33GSP-00 October 2015 1 http://www.richtek.com RT9074-33GSP Evaluation Board your power partner. Introduction General Product Information The RT9074 is a high input-voltage linear regulator specifically designed to minimize external components. The input voltage range is from 4.5V to 60V. The device supplies 100mA of output current with a maximum dropout voltage of 300mV. Its 30μA quiescent and 5μA shutdown currents make it ideal for use in battery-powered applications. Product Feature Wide Input Voltage Range : 4.5V to 60V Low Quiescent Current : 30µA Low Dropout Voltage : 300mV maximum at 100mA ±3% Output Tolerance Over Line and Load Stable with 1μF Output Capacitor (Aluminum, Tantalum or Ceramic) Inherent Reverse-Current Protection (No diode needed) -60V Reverse-Battery Protection Key Performance Summary Table Key Features Evaluation Board Number : PCB030_V1 Default Input Voltage 5V Max Output Current 100mA Default Output Voltage 3.3V Default Marking & Package Type RT9074-33GSP, SOP-8 (Exposed Pad) Other Key Features 4.5V to 60V Input Voltage Range Low Dropout Voltage : 300mV maximum at 100mA ±3% Output Tolerance Over Line and Load Inherent Reverse-Current Protection (No diode needed) -60V Reverse-Battery Protection Protection Current Limit Thermal Shutdown EVB_RT9074-33GSP-00 October 2015 2 http://www.richtek.com RT9074-33GSP Evaluation Board your power partner. Bench Test Setup Conditions Headers Description and Placement Please carefully inspect the EVB IC and external components, comparing them to the following Bill of Materials, to ensure that all components are installed and undamaged. If any components are missing or damaged during transportation, please contact the distributor or send e-mail to [email protected] Test Points The EVB is provided with the test points and pin names listed in the table below. Test point/ Pin name Signal Comment (expected waveforms or voltage levels on test points) VIN Input voltage Input voltage range = 4.5V to 60V VOUT Output voltage Default output voltage = 3.3V SHDN Shutdown Control test point Shutdown Control Input (Active High). Connect SHDN high to disable the output voltage and reduce the IC’s quiescent current to 5μA (typical). GND Ground Ground SENSE Output Voltage Sense point Output Voltage Sense. FB Feedback Input test point Feedback Input. Connect to the center tap of a resistor divider for setting the output voltage. (Adjustable versions only) Power-up & Measurement Procedure 1. Connect input power (4.5V < VIN < 60V) and input ground to VIN and GND test pins respectively. 2. Connect positive end and negative terminals of load to VOUT and GND test pins respectively. 3. Connect power (0V ≤ VIN ≤ 60V) and ground to SHDN and GND test pins respectively. 4. Setting SHDN to GND be 0V for enable the RT9074. 5. Verify the output voltage (approximately 3.3V) between VOUT and GND. 6. Connect an external load up to 100mA to the VOUT and GND terminals and verify the output voltage and current. EVB_RT9074-33GSP-00 October 2015 3 http://www.richtek.com RT9074-33GSP Evaluation Board your power partner. Schematic, Bill of Materials & Board Layout EVB Schematic Diagram Bill of Materials Reference Qty Part Number Description Package Manufacture U1 1 RT9074-33GSP LDO SOP-8 (Exposed Pad) RICHTEK C1 1 GRM21AR72A224KAC5L 0.22μF/±10%/100V/X7R Ceramic Capacitor 0805 Murata C2 1 GRM31CR71H225KA88L 2.2μF/±10%/50V/X7R Ceramic Capacitor 1206 Murata R1, EC1, R2, EC2, R4, C4 6 Not Installed 0603 R3 1 0Ω, Resistor 0603 R5 1 100kΩ/±1%, Resistor 0603 GP1, GP2, GP3, GP4 4 VIN, VOUT, GND Golden Pin TP1, TP2, TP3 3 SHDN, SENSE, FB Test Pin EVB_RT9074-33GSP-00 October 2015 4 http://www.richtek.com RT9074-33GSP Evaluation Board your power partner. PCB Layout Top View Bottom View EVB_RT9074-33GSP-00 October 2015 5 http://www.richtek.com RT9074-33GSP Evaluation Board your power partner. More Information For more information, please find the related datasheet or application notes from Richtek website http://www.richtek.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 T O BUYER OR USER FOR ANY AND ALL DAMAGES INCLUDING WITHOUT LIMITATION TO DIRECT, INDIRECT, SPECIAL, PUNITIVE OR CONSEQUENTIAL DAMAGES. EVB_RT9074-33GSP-00 October 2015 6 http://www.richtek.com