UNISONIC TECHNOLOGIES CO., LTD UR5517 LINEAR INTEGRATED CIRCUIT 3A DDR BUS TERMINATION REGULATOR DESCRIPTION The UR5517 is a linear regulator which provides up to 3 Amp bi-directional sourcing and sinking capability for DDR1/2/3 SDRAM bus terminator applications. It only requires 20uF of ceramic output capacitance by a integrated operational amplifier which provides fast load transient response. The UR5517 also includes two control pins, S3 & S5. If S3 were set in low level, VTT will be turned off and left Hi-Z(sleep-state mode).If setting S5 were set in low level, both VTT and VTTREF will be turned off and discharged to ground(soft-off mode). FEATURES * Input Voltage Range:3~5.5V * VLDOIN Voltage Range:1.2V~3.6V * DDR1/2/3 Termination Voltage Applications * Sourcing and Sinking Current up to 3A * ±20mV Accuracy for VTT and VTTREF * 10mA Buffered Reference(VTTREF) * Supports High-Z in S3(STR) and Soft-off in S5(Shutdown) * Integrated Divider Tracks 1/2 VDDQSNS for Both VTT&VTTREF * Built-In Soft-Start * Current Limiting Protection * Thermal Shutdown Protection ORDERING INFORMATION Ordering Number Lead Free Halogen Free UR5517L-SM2-R UR5517G-SM2-R UR5517L-SM2-T UR5517G-SM2-T UR5517L-SM2 -R (1)Packing Type (2)Package Type (3)Lead Free www.unisonic.com.tw Copyright © 2011 Unisonic Technologies Co., Ltd Package Packing MSOP-10 MSOP-10 Tape Reel Tube (1) R: Tape Reel, T: Tube (2) SM2: MSOP-10 (3) G: Halogen Free, L: Lead Free 1 of 9 QW-R102-041.B UR5517 LINEAR INTEGRATED CIRCUIT PIN CONFIGURATIONS PIN DESCRIPTION(Note) PIN NAME PIN TYPE PIN DESCRIPTION VDDQSNS I VDDQ sense input VLDOIN I Power supply for the VTT & VTTREF output stage VTT O Output voltage for connection to termination resistors, equal to VDDQSNS/2 PGND O Power ground output for the VTT output VTTSNS I Voltage sense input for the VTT. Connect to plus terminal of the output capacitor VTTREF O Buffered output that is a reference output, equal to VDDQSNS/2 S3 I Active low suspend to RAM mode control pin, VTT is turned off and left Hi-Z GND I Ground S5 I Active low shutdown control pin, both VTT&VTTREF are turned off and discharged to ground VIN I Analog input pin Note：Recommend connecting the Thermal Pad to the GND for the excellent power dissipation. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 9 QW-R102-041.B UR5517 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM VDDQSNS VIN VLDOIN OTP S3 STB S5 SD VTTSNS VDDQSNS / 2 *1.05 + VTTREF + VTT VDDQSNS /2 PGOOD VDDQSNS / 2 *0.95 Current Limit GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw PGND 3 of 9 QW-R102-041.B UR5517 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATING (unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Supply Voltage(VIN,VLDOIN,VDDQSNS,S3,S5) -0.3~6 V Power Ground Output for the VTT Output PGND -0.3~0.3 V Output Voltage(VTT,VTTREF) VTT,VTTREF -0.3~VLDOIN+0.3 V Junction Temperature TJ 160 ℃ Storage Temperature TSTG -55 ~ +160 ℃ 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. RECOMMENDED OPERATING CONDITIONS (Note1, 2) PARAMETER SYMBOL MIN TYP MAX Input Voltage VIN 3 5.5 STR and Shutdown Voltage S3,S5 -0.1 5.5 VDDQ Sense Input VDDQSNS 1.3 3.6 Power Supply for the VTT and VTTREF Output Stage VLDOIN 1.2 3.6 Power Ground Output for the VTT Output PGND -0.1 0.1 Operating Temperature TA -40 85 Note: 1. All voltage values are with respect to the network ground terminal unless otherwise noted. 2. Please always keep VLDOIN,VTTSNS,VDDQSNS,S3,S5 lower than VIN on operation. UNIT V V V V V ℃ ELECTRICAL CHARACTERISTICS (VIN=5V,VLDOIN=VDDQSNS=2.5V, TA=25℃.Unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS S5=Hi,S3=Hi, no load(Normal) IVIN Current of VIN IVINSTB S5=Hi,S3=Lo, no load(Standby) IVINSDN S5=Lo,S3=Lo, no load(Shutdown) S5=Hi,S3=Hi, no load(Normal) IVLDOIN Current of VLDOIN IVLDOINSTB S5=Hi,S3=Lo, no load(Standby) IVLDOINSDN S5=Lo,S3=Lo, no load(Shutdown) Input Impedance of VDDQSNS ZVDDQSNS S5=Hi,S3=Hi Input Current of VTTSNS IVTTSNS S5=Hi,S3=Hi DDR1(VLDOIN=VDDQSNS=2.5V) Output Voltage of VTT VTT DDR2(VLDOIN=VDDQSNS=1.8V) DDR3(VLDOIN=VDDQSNS=1.5V) IVTT =0 Load Regulation of VTT VosVTT ∣IVTT∣<1.5A (VTTREF-VTT) ∣IVTT∣<3A VTT=VDDQSNS/2*0.95,PGOOD=HI Source Current Limit of VTT IVTTOCLSRC VTT=0 VTT=VDDQSNS/2*1.05,PGOOD=HI Sink Current Limit of VTT IVTTOCLSNK VTT=VDDQSNS Leakage Current of VTT IVTTLK S5=Hi,S3=Lo Discharge Current of VTT IVTTDIS S5=Lo, VDDQSNS=0V,VTT=0.5V DDR1(VLDOIN=VDDQSNS=2.5V) Output Voltage of VTTREF VTTREF DDR2(VLDOIN=VDDQSNS=1.8V) DDR3(VLDOIN=VDDQSNS=1.5V) Load Regulation of VTTREF ΔVTTREF ∣IVTTREF∣<10mA High Level Input Voltage VIH S3 & S5 pin Low Level Input Voltage VIL S3 & S5 pin Logic Input Leakage Current IILEAK S3 & S5 pin Thermal Shutdown Temperature TSD VIN=3V~5.5V Thermal Shutdown Hysteresis ΔTSD VIN=3V~5.5V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 0.5 TYP 0.8 110 0.03 0.1 0.1 200 0.3 1.25 0.9 0.75 -20 -30 -40 3 1.5 3 1.5 10 MAX 2 200 1 2 10 1 1 V 20 30 40 4 2 4 2 0.01 20 1.25 0.9 0.75 -20 1.6 A uA mA V 1 1 160 20 mV A 20 -1 UNIT mA uA uA mA uA uA kΩ uA mV V uA ℃ 4 of 9 QW-R102-041.B UR5517 LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATIONS CIRCUIT DDR2 1.8V Vo1 Io1 VDDQSNS VIN VLDOIN S5 VTT RL1 S3 VTTSNS VTTREF C1 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw RS5 10K V5 GND PGND 2*10uF 5V RS3 10K 0.1uF V3 RL2 Io2 C2 5 of 9 QW-R102-041.B UR5517 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 9 QW-R102-041.B UR5517 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS(Cont.) Output Short Circuit Protection VIN=5V, VLDOIN=2.5V, VTT=1.25V Source 5 6 Output Short Current (A) Output Short Current (A) 6 Output Short Circuit Protection 4 3 2 1 VIN=5V, VLDOIN=2.5V, VTT=1.25V Sink 5 4 3 2 1 0 Output Short Current (A) Output Short Current (A) Output Short Current (A) Output Short Current (A) 0 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 9 QW-R102-041.B UR5517 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS(Cont.) Shutdown Waveforms S3&S5 High to Low VS5 VS3 VTTREF VTT IVTT=IVTTREF=0A UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 8 of 9 QW-R102-041.B UR5517 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 9 of 9 QW-R102-041.B