UNISONIC TECHNOLOGIES CO., LTD UR6516B Preliminary CMOS IC 2A SINK & SOURCE ADJUSTABLE LINEAR BUS TERMINATOR DESCRIPTION The UTC UR6516B is a low cost linear regulator providing a desired output voltage or termination voltage for various applications by converting voltage supplies ranging from 1V ~ 6.0V. The desired output voltage could be programmable by two external voltage divider resistors. The UTC UR6516B can source or sink up to 2A of current while regulating an output voltage to within 2% (DDR-I), 3% (DDR-II) or less. The UTC UR6516B can be used in applications, such as PCI/AGP graphics, game/play station, set top box, mother board. FEATURES * Ideal for DDR-I ,DDR-II * Output Voltage could Drop Down to 0.6V * Source and Sink up to 2A, Without an External Heat Sink * Integrated Power MOSFETs * Output Voltage Varies though Adjusting External Resistors * ICCQ is Lower than 500uA at VCCA * Thermal Shutdown Protection, Current Limit Protection, and Short Circuit Protection Circuits Included * Shutdown for Standby or Suspend Mode Operation * Requiring Minimum External Components ORDERING INFORMATION Ordering Number UR6516BG-SH2-R Package HSOP-8 www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd Packing Tape Reel 1 of 6 QW-R502-449.a UR6516B Preliminary CMOS IC PIN CONFIGURATION PIN DESCRIPTION PIN NO 1 2,7,8 3 4 5 6 PIN NAME VIN GND NC VOUT REFEN VCCA DESCRIPTION Input Power Ground No Connection Output Voltage Reference Voltage Input and Chip Enable Voltage Supply for Internal Circuits UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R502-449.a UR6516B Preliminary CMOS IC BLOCK DIAGRAM VCCA Current Limit Protection REFEN VIN Thermal EA VOUT GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 6 QW-R502-449.a UR6516B Preliminary CMOS IC ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT VIN, VCCA VIN, VCCA 7 V Output RMS Current, Source or Sink 2 A Storage Temperature TSTG -65~125 °C Notes: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. OPERRATING RATING PARAMETER Input Power Output Voltage Reference Voltage Input and Chip Enable Voltage Supply for Internal Circuits TEST CONDITIONS MIN 1 TYP 2.5/1.8/1.5 MAX UNIT 6 V V VCCA-1.9 V VCCA-1.9 6 V THERMAL DATA PARAMETER Junction to Case SYMBOL VIN VOUT REFEN VCCA SYMBOL θJC RATINGS 14 UNIT °C/W ELECTRICAL CHARACTERISTICS (TA=25°C; VIN=+2.5V and VCCA=+3.3V, VREFEN=1.25V, unless otherwise specified) (Note 1) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX Output Offset Voltage (Note 2) VOS IOUT=0A -20 20 Operating Current at VIN IOP No load, Cout=200uF 1 IL: 0A -> 2A 0.8/1.2 2/3 ｜ΔVLOAD｜ Load Regulation (DDR I/II) IL: 0A -> -2A 0.8/1.2 2/3 VCCA>VOUT+1.9V, IOUT=2A 0.3 0.4 Dropout Voltage VDROPOUT 0.2 0.25 VCCA>VOUT+1.9V, IOUT=1.5A Quiescent Current at VCCA ICCQ At Room Temp. 190 230 Current in Shutdown Mode ISHDN VREFEN<0.2V, RL= 10 Ohm 90 110 Input Voltage Range (Note 3) VIN No Load 1 2.5/1.8 6 Input Voltage Range (Note 3) VCCA RL= 10 Ohm 3.15 3.3 6 Short Circuit Protection Current Limit ILIMIT 5 Short Current ISC,VIN Sinking 2 Short Current ISC,GND Sourcing 2 Over Thermal Protection Thermal Shutdown Temperature THSD 3.15V<=VCCA<=6V 125 150 155 Thermal Shutdown Hysteresis 25 30 35 REFEN Function VREFEN < VIN 0.4 0.5 0.6 REFEN Threshold VREFEN < VCCA – 1.9V Notes: 1. Maximum ratings are stress ratings only and functional device operation is not implied. Limits are guaranteed by 100% testing, sampling, or correlation with worst case test conditions 2. VOS = VREFEN – VOUT 3. Keep VCCA >= VIN and VCCA >= VREFEN + 1.9V on operation power on and power off sequences 4. Guaranteed by design, not 100% test UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw UNIT mV mA % % V V µA µA V V A A A °C °C V 4 of 6 QW-R502-449.a UR6516B Preliminary CMOS IC FUNCTIONAL DESCRIPTION The UTC UR6516B is a low cost linear regulator, which can sink and source 2A of current without an external heat sink. The UTC UR6516B incorporates power MOSFETs that are capable of sourcing and sinking 2A of current while keeping perfect voltage regulation. By using the external feedback, the output voltage can be regulated within 3% or less. Separate voltage supply inputs have been added to fit applications with various power supplies for the databus and power buses. OUTPUTS The VOUT pins (output voltage pins) are connected to the databus, address, or clock lines via an external inductor. The output voltage varies depending on the input voltage. INPUTS The output voltage is determined by the input voltage. The desired output voltage could be programmable by two external voltage divider resistors. The VIN pin is suggested to connect to VDDQ of memory module for better tracking with memory VDDQ. OTHER SUPPLY VOLTAGES VCCA provide the voltage supply to the logic section and internal error amplifiers of UTC UR6516B. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 6 QW-R502-449.a UR6516B Preliminary CMOS IC TYPICAL APPLICATION CIRCUIT VIN 1 C3 4.7µF CEin 200µF 2 3 VOUT 4 CEout 200µF 1 C4 4.7µF 2 U1 VIN GND GND GND NC VCCA VOUT REFEN 8 R1 100K 7 VCCA 6 C1 104 C2 104 R2 100K Q1 EN UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 6 QW-R502-449.a