EVB_RT9089AGQW

RT9089AGQW Evaluation Board your power partner. RT9089AGQW DDR Termination Regulator Evaluation Board Purpose The RT9089A is a sink/source tracking termination regulator. This document explains the function and use of the RT9089A 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 Applications ........................................................................................................................................................... 2 Bench Test Setup Conditions ................................................................................................................................. 3 Schematic, Bill of Materials & Board Layout ........................................................................................................... 5 More Information.................................................................................................................................................... 8 Important Notice for Richtek Evaluation Board ....................................................................................................... 8 EVB_RT9089AGQW-00 October 2015 1 http://www.richtek.com RT9089AGQW Evaluation Board your power partner. Introduction General Product Information The RT9089A is a sink/source tracking termination regulator. It is specifically designed for low-cost and lowexternal component count systems. The RT9089A possesses a high speed operating amplifier that provides fast load transient response and only requires a minimum 10μF ceramic output capacitor. The RT9089A supports remote sensing functions and all features required to power the DDRI/DDRII/DDRIII and Low Power DDRIII/DDRIV VTT bus termination according to the JEDEC specification. The RT9089A is available in the thermal efficient package, WDFN-10L 2x2. Product Feature  VIN Input Voltage Range : 1.1V to 3.5V  VCNTL Input Voltage Range : 2.9V to 5.5V Support Ceramic Capacitors 10mA Source/Sink Reference Output Meet DDRI, DDRII JEDEC Spec        Support DDRIII, Low Power DDRIII/DDRIV VTT Applications Soft-Start Function UVLO and OCP Protection Thermal Shutdown Applications   Notebook/Desktop/Server Telecom/Datacom, GSM Base Station, LCD-TV/PDPTV, Copier/Printer, Set-Top Box Key Performance Summary Table Key Features Evaluation Board Number : PCB043_V1 VIN Input Voltage Range 1.1V to 3.5V VCNTL Input Voltage Range 2.9V to 5.5V Max Output Current 2A Default Output Voltage Set by VDDQSNS pin voltage level (VOUT = VDDQSNS / 2) Default Marking & Package Type RT9089AGQW, WDFN-10L 2x2 EVB_RT9089AGQW-00 October 2015 2 http://www.richtek.com RT9089AGQW 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 evb_service@richtek.com 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 Power input of the regulator. VOUT Output voltage Power output of the regulator. VDDQSNS Reference input Reference input. GND Ground Analog ground. Connect to negative terminal of the output capacitor. The exposed pad must be soldered to a large PCB and connected to GND for maximum power dissipation. PGND Power ground Power ground of the regulator. SENSE Voltage sense input Voltage sense input for the regulator. Connect to positive terminal of the output capacitor or the load. REFOUT Reference output Reference output. Connect to GND through a 0.1µF ceramic capacitor. S3 S3 signal input S3 signal input. S5 S5 signal input S5 signal input. VCNTL Power good output test point Control voltage input. Connect this pin to the 3.3V or 5V power supply. A ceramic decoupling capacitor with a value 4.7µF is required. EVB_RT9089AGQW-00 October 2015 3 http://www.richtek.com RT9089AGQW Evaluation Board your power partner. Power-up & Measurement Procedure 1. Short J1, J8, the (1, 2) pin of J2 and the (1, 2) pin of J7 by jumper respectively. 2. Provide input voltage (2.9V < VCNTL < 5.5V) to VCNTL pin. 3. Connect input power (1.1V < VIN < 3.5V) and input ground to VIN and GND pins respectively. 4. Connect positive end and negative end of load to VOUT and GND of output pins respectively. 5. The output voltage (VOUT) can be set by the voltage level of VDDQSNS, since VDDQSNS is short with VIN : VOUT = (VDDQSNS / 2) = (VIN / 2) Specification Parameter Symbol Min Control Input Voltage VCNTL Supply Input Voltage Max Units 2.9 5.5 V VIN 1.1 3.5 V VOUT Source Current Limit ILIM_VOUT_SR 2 A VOUT Sink Current Limit ILIM_VOUT_SK 2 A EVB_RT9089AGQW-00 October 2015 4 Typ. http://www.richtek.com RT9089AGQW 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 RT9089AGQW DDR Termination Regulator WDFN-10L 2x2 RICHTEK C12 1 C2012X5R0J475KT00HW 4.7µF/6.3V/X5R C-0805 TDK C13 1 0805B104K500 0.1µF/50V/X7R C-0805 WALSIN C2, C3 2 C2012X5R1C106KT 10µF/16V/X5R C-0805 TDK C6 1 C2012X5R1C106KT 10µF/16V/X5R C-0805 TDK C1, C4, C5, C7, C8, C9, C10, C11, C14, C15, C16, C17, C18, C19, R2, R5 16 NC R1, R4 2 0Ω EVB_RT9089AGQW-00 October 2015 5 R-0603 http://www.richtek.com RT9089AGQW Evaluation Board your power partner. PCB Layout Top View (1st layer) PCB Layout—Inner Side (2nd Layer) EVB_RT9089AGQW-00 October 2015 6 http://www.richtek.com RT9089AGQW Evaluation Board your power partner. PCB Layout—Inner Side (3rd Layer) Bottom View (4th Layer) EVB_RT9089AGQW-00 October 2015 7 http://www.richtek.com RT9089AGQW 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_RT9089AGQW-00 October 2015 8 http://www.richtek.com