UNISONIC TECHNOLOGIES CO., LTD UR6512 LINEAR INTEGRATED CIRCUIT 2A DDR BUS TERMINATION REGULATOR DESCRIPTION The UR6512 is a linear regulator providing up to 2A transient peak current and has sourcing and sinking capability for DDR SDRAM bus terminator applications while regulating an output voltage to within 20mV. It contains a high speed operational amplifier which provides fast load transient response and only requires 10uF of ceramic output capacitance. The UR6512 output termination voltage tracks the reference voltage applied at VREF pin. A resistor divider connected to VIN, GND and VREF pins is used to force the reference voltage to VREF pin. Additional features include current limiting protection and thermal shutdown protection. FEATURES * DDR1/ DDR2 Termination Voltage Applications * Low Output Voltage Offset within 20mV@±1.8A * Source and Sink 2A Peak Current * Adjustable Output Voltage by External Resistors * Integrated Power MOS Devices * Suspend to RAM(STR) Functionality * Current Limiting Protection * Thermal Shutdown Protection * Cost-Effective and Easy to Use ORDERING INFORMATION Ordering Number UR6512G-SH2-R Package HSOP-8 www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd Packing Tape Reel 1 of 7 QW-R101-030.A UR6512 LINEAR INTEGRATED CIRCUIT PIN CONFIGURATIONS VIN 1 8 NC GND 2 7 NC VREF 3 6 VCNTL VOUT 4 5 NC GND PIN DESCRIPTION PIN NO 1 2 3 4 6 5,7,8 PIN NAME VIN GND VREF VOUT VCNTL NC PIN TYPE I O I O I -- PIN DESCRIPTION Power supply pin for the VOUT output Ground pin Reference voltage input and active-low shutdown control pin Output voltage pin Power supply pin for the internal control circuits No connect UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 7 QW-R101-030.A UR6512 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 7 QW-R101-030.A UR6512 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATING (unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT VCNTL Control Voltage VCNTL 6 V VIN Supply Voltage VIN 6 V Power Dissipation (Ta=25°C) PD 1.176 W Junction Temperature TJ 125 °C Storage Temperature TSTG -65 ~ +150 °C Note: 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. THERMAL DATA PARAMETER Junction to Ambient (Note) Junction to Case SYMBOL θJA θJC RATINGS 86 15 UNIT °C/W °C/W RECOMMENDED OPERATING CONDITIONS (Note 1) PARAMETER SYMBOL RATINGS VCNTL Control Voltage VCNTL (3.3 or 5) ±5% VIN Supply Voltage VIN (1.8 ~ 2.5) ±3% VREF Input Voltage VREF (0.9 ~ 1.25) ±3% Junction Temperature TJ -40~+125 Notes: 1. All voltage values are with respect to the network ground terminal unless otherwise noted. 2. The VOUT tracks the VREF with additional voltage offset and load regulation. UNIT V V V °C ELECTRICAL CHARACTERISTICS (Ta=25°C, unless otherwise specified) (VIN=1.8V, VCNTL=5V, VREF=0.9V, COUT = 10µF (Ceramic)) PARAMETER SYMBOL INPUT CURRENT Operation Current of VCNTL ICNTL Standby Current ISTB OUTPUT VOLTAGE (DDR/DDR II/DDR III) Output Voltage Offset (VREF-VOUT) VOS Load Regulation ΔVLOAD PROTECTION Current Limit ILIMIT Thermal Shutdown Temperature TSD Thermal Shutdown Hysteresis ΔTSD VREF Shutdown VIH Shutdown Threshold VIL TEST CONDITIONS IOUT =0A VREF<0.2V, RLOAD=180Ω IOUT =0A IOUT =±1.8A -20 -20 VIN=2.5V/1.8V VCNTL=5V VCNTL=5V 2 125 Enable Shutdown 0.6 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP MAX UNIT 1 2 2.5 90 mA μA 20 20 mV mV A °C °C 170 35 0.15 V V 4 of 7 QW-R101-030.A UR6512 LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATIONS CIRCUIT 2.5V/1.8V 1 VIN NC 8 2 GND NC 7 3 VREF VCNTL 6 5V CIN R1 R2 CSS VOUT CCNTL 4 VOUT NC 5 COUT R1=R2=100KΩ, COUT=10μF(Ceramic)+1000μF under the worst case testing condition CSS=1μF, CIN=470μF(Low ESR), CCNTL=47μF R2 VREF = VIN ( V ) , VOUT track VREF R1 + R2 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 7 QW-R101-030.A UR6512 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS Output Short Circuit Protection Output Short Circuit Protection Output Short Current (A) 5 4 3 2 1 6 Output Short Current (A) Source VIN=2.5V VCNTL=5V 6 5 4 3 2 1 0 0 Time(1ms/ Div) Time(1ms/ Div) Output Short Circuit Protection Output Short Current (A) 5 4 3 2 1 Output Short Circuit Protection 6 Output Short Current (A) Source VIN=1.8V VCNTL=5V 6 5 4 3 2 1 Time(1ms/Div) Time(1ms/Div) 50 VIN=2.5V,VCNTL=5V,VOUT=1.25V 0 -50 [email protected] Transient Response Output Voltage Transient (mV) [email protected] A Transient Response Output Voltage Transient (mV) Sink VIN=1.8V VCNTL=5V 0 0 Output Current (A) 1 0 -1 -2 50 VIN=1.8V,VCNTL=5V,VOUT=0.9V 0 -50 2 2 Output Current (A) Sink VIN=2.5V VCNTL=5V Time(200us/ Div) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 1 0 -1 -2 Time(200us/Div) 6 of 7 QW-R101-030.A UR6512 Output Voltage (V) TYPICAL CHARACTERISTICS(Cont.) Output Voltage (V) LINEAR INTEGRATED CIRCUIT 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 7 of 7 QW-R101-030.A