UNISONIC TECHNOLOGIES CO., LTD UR5515 CMOS IC 1.5A/3A BUS TERMINATION REGULATOR SOP-8 DESCRIPTION The UTC UR5515 is a linear bus termination regulator and designed to convert voltage supplies ranging from 1.6V~6.0V into a desired output voltage, which adjusted by two external voltage divider resistors. The device can both source and sink up to 1.5A/3A of current while regulating an output voltage to within 2% (DDR-I) and 3% (DDR-II) or less. The UTC UR5515 is capable of use in conjunction with series termination resistors to provide an excellent voltage source for active termination schemes of high speed transmission lines as those seen in high speed memory buses and distributed backplane designs. The voltage output of the regulator can be used as a termination voltage for DDR SDRAM. 1 1 TO-252-5 TO-263-5 *Pb-free plating product number: UR5515L FEATURES * Support Both DDR-I (1.25 VTT) and DDR-II (0.9 VTT) Requirements * Capable of Sourcing and Sinking Current 1.5A/3A * Current-limiting Protection and Thermal Shutdown Protection * Integrated Power MOSFETs * Generates Termination Voltages for SSTL-2 * High Accuracy Output Voltage at Full-Load * Adjustable output voltage by External Resistors * Minimum External Components * Shutdown for Standby or Suspend Mode Operation with High-impedance Output. ORDERING INFORMATION Order Number Normal Lead Free Plating UR5515-S08-R UR5515L-S08-R UR5515-S08-T UR5515L-S08-T UR5515-TN5-R UR5515L-TN5-R UR5515-TN5-T UR5515L-TN5-T UR5515-TQ5-R UR5515L-TQ5-R UR5515-TQ5-T UR5515L-TQ5-T www.unisonic.com.tw Copyright © 2005 Unisonic Technologies Co., LTD Package Packing SOP-8 SOP-8 TO-252-5 TO-252-5 TO-263-5 TO-263-5 Tape Reel Tube Tape Reel Tube Tape Reel Tube 1 of 8 QW-R502-056,A UR5515 CMOS IC PIN DESCRIPTION PIN NO. SOP-8 1 2 5,6,7,8 3 4 TO-252-5/TO-263-5 1 2 3 4 5 PIN NAME VIN GND VCNTL VREF VOUT DESCRIPTION Input Voltage Ground Gate Drive Voltage Reference Voltage Input and Chip Enable Output Voltage BLOCK DIAGRAM VCNTL VREF Current Limiting Sensor CNTL VIN VOUT Thermal GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 8 QW-R502-056,A UR5515 CMOS IC ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT Input Voltage VIN 7 V Power Dissipation PD Internally Limited W ℃ Junction Temperature TJ 125 ℃ Storage Temperature Range TSTG -40 ~ 150 Note:1.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. 2.The device is guaranteed to meet performance specification within 0℃~70℃ operating temperature range and assured by design from –20℃~85℃. ELECTRICAL CHARACTERISTICS (Ta = 25℃, unless otherwise specified: VIN = 2.5V, VCNTL= 3.3V, VREF = 1.25V, COUT=10µF(Ceramic).) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX DDR-I 1.6 2.5 VIN DDR-II 1.8 Input Voltage Range(Note 1) No Load,(Note 2) DDR-I 3.3 6 VCNTL DDR-II 3.3 6 Output Offset Voltage VOS IOUT=0A, Fig. 1 (Note 3) -20 0 20 Operating Current of VCNTL ICNTL No Load 6.5 10 DDR-I 0.8 2 IL: 0~1.5A, Fig. 1 DDR-II 1.2 3 |△VLOAD| Load Regulation DDR-I 0.8 2 IL: 0~-1.5A, Fig. 1 DDR-II 1.2 3 Current In Shutdown Mode ISHDN VREF<0.2V, RL=180Ω, Fig. 2 50 90 Short Circuit Protection UR5515 Fig 3, 4 2.1 Current Limit ILIMIT UR5515A Fig 3, 4 3.0 Over Temperature Protection Thermal Shutdown Temperature TSD 3.3V≤VCNTL≤5V 125 150 Thermal Shutdown Hysteresis 50 Shutdown Function Shutdown Threshold Voltage VTHD Fig 5 0.2 0.8 Note 1. For safely operate your system, the 3.3V rail have to be tied to VCNTL rather than 5V rail 2. Keep VCNTL≥VIN on operation power on and power off sequences. 3. VOS offset is the voltage measurement defined as VOUT subtracted from VREF. UNIT V mV mA % µA A ℃ ℃ V THERMAL DATA PARAMETER Thermal Resistance Junction-Case UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw SYMBOL SOP-8 TO-252-5 TO-263-5 θJC RATINGS 35 8 4 UNIT ℃/W 3 of 8 QW-R502-056,A UR5515 CMOS IC TEST CIRCUITS 2.5 V 3.3V VIN VCNTL VREF 1.25V 2.5V VIN VOUT UTC VOUT UR5515 GND I L COUT 1.25V 0.2V V 1.25V 3.3V VIN VCNTL VREF UTC UR5515 VOUT GND A Power supply with current limit 2.5V VIN VOUT 1.25V V Fig 3. Current Limit for HIgh Side, I CLHIGH RL 1.25V V 0V R Land COUT Time delay VREF A 3.3V IL VCNTL UTC VOUT UR5515 VOUT V GND COUT Fig 4. Current Limit for Low Side, ICLLOW 3.3V 2.5V VIN 1.25V VREF 0.2V VREF VCNTL UTC UR5515 VOUT 1.25V 0V VOUT Fig 2. Current in Shutdown Mode, ISHCLN IL COUT VOUT VCNTL UTC UR5515 VOUT VREF GND COUT Fig1. Output Voltage Tolerance , △ VOUT 2.5V 3.3V V GND VOUT RL V COUT VOUT would be low if VREF < 0.2V VOUT would be high if VREF > 0.8V RL and COUT Time delay Fig 5. VREF Pin Shutdown Threshold Voltage UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 8 QW-R502-056,A UR5515 CMOS IC TYPICAL APPLICATION CIRCUIT R1= R2= 100KΩ COUT(min)=10µF(Ceramic) + 1000µF under the worst case testing condition CSS=1µF, CIN = 40µF(low ESR), CCNTL= 47µF APPLICATIONS INFORMATION Please note the point of thermal shutdown will be degraded by around 20℃while VCNTL equal to 5V compared with 3.3V. It is highly recommended that to use the 3.3V rail acted as the VCNTL in SOP-8 package. Nevertheless, this small footprint of PCB for plastic SOP-8 package is not enough to dissipate effectively the heat generated when operating at high current levels. In order to control die operating temperatures, the PCB layout should allow for maximum possible copper area at the four VCNTL pins. Besides, an appropriate power plane heat sink must be used to prevent overstepping maximum junction temperature. The recommended SMT is as below. The PCB heat sink copper area should be solder painted without masked. This approaches a "best case " pad heat sink . Use vias to conduct the heat into the buried or backside of PCB layer. UTC UR5515 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw (SOP-8) 5 of 8 QW-R502-056,A UR5515 CMOS IC TYPICAL CHARACTERISTICS 8.0 8.0 7.0 7.0 6.0 6.0 5.0 4.0 3.0 2.0 VCNTL =3.3V VIN =2.5V VOUT=1.25V 1.0 0.0 -40 -20 0 20 40 60 80 5.0 4.0 3.0 2.0 0.0 -40 -20 100 120 600 550 500 450 400 -40 -20 80 100 120 VCNTL=3.3V VIN=2.5V 0 20 40 60 80 100 120 600 550 500 450 400 -40 -20 Temperature (℃) T -50 T 0 -1 -2 Time (250μS /Div) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw Output Current (A) VCNTL =3.3V Swing Frequency =1kHz VREF =1.25V 50 VIN =2.5V 0 20 40 60 80 100 120 1.25VTT @ 3A Transient Response Output Transient Voltage (mV) 100 VCNTL=5.0V VIN=2.5V Temperature(℃) 1.25VTT @1.5A Transient Response Output Transient Voltage (mV) 60 Turn-On Threshold vs. Temperature 650 Output Current (A) 40 Turn -On Threshold vs. Temperature 650 1 20 Temperature (℃) 700 2 0 Temperature (℃) 700 0 V CNTL=3.3V VIN =2.5V VOUT=1.25V 1.0 Th reshold Voltage (mV) Threshold Voltage (mV) Sinking Current (Peak) vs. Temperature Sinking Current (A) Sourcing Current (A) Sourcing Current(Peak) vs. Temperature 100 V REF=1.25V 50 VIN=2.5V 0 -50 VCNTL = 3.3V Temperature (? Swiing Frequency=1kHz T 4 2 T 0 -2 -4 Time (250μS /Div) 6 of 8 QW-R502-056,A UR5515 CMOS IC TYPICAL CHARACTERISTICS (cont.) 0.9VTT @3A Transient Response VCNTL= 3.3V Swiing Frequency=1kHz VREF = 0.9V 50 VIN =1.8V 0 T -50 Output Current (A) 2 T 1 Output Transient Voltage (mV) 100 Output Current (A) Output Transient Voltage (mV) 0.9VTT @1.5A Transient Response 0 -1 100 0 T -50 4 2 T 0 -2 -4 -2 Time (250μS/Div) Time (250μS/Div) Temperature vs. RDS (ON) Temperature vs. R DS (ON) 0.32 V IN =0.9V V =5.0V 0.31 VCNTL=1.0V REF 0.30 VIN=0.85V 0.28 0.27 VIN =0.8V 0.26 0.25 RDS (ON) (Ω) 0.31 V =3.3V 0.30 VCNTL=1.0V REF 0.29 RDS (ON) (Ω) VCNTL = 3.3 V Swiing Frequency=1kHz V REF=0.9V 50 VIN =1.8V 0.29 0.28 VIN=0.8V 0.27 0.26 0.24 0.25 0.23 0.24 0.22 25 35 45 55 65 75 85 95 105 115 125 0.23 25 35 45 55 65 75 85 95 105 115 125 Temperature (℃) Temperature (℃) Output Short-Circuit Protection 10 8 Sink T VIN=2.5V V CNTL=3.3V V REF=1.25V 6 4 2 0 -2 -4 Output Short-Circuit Protection 12 10 Output Short Circuit (A) 12 Output Short Circuit (A) VIN =0.9V VIN=0.85V 8 Source T VIN=2.5V V CNTL=3.3V V REF =1.25V 6 4 2 0 -2 Force the output shorted to VDDQ Time (5mS/Div) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw -4 Force the output shorted to VDDQ Time (5mS/Div) 7 of 8 QW-R502-056,A UR5515 CMOS IC 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 8 of 8 QW-R502-056,A