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| AIC1383B 3A Termination Regulator FEATURES 3A Source and Sink Current Ability Support DDR1 (1.25VTT) and DDR2 (0.9VTT) Requirements Low Output Voltage Offset, 20mV High Accuracy Output Voltage at Full-Load Adjustable VOUT by External Resistor Low External Component Count Current Limit protection Thermal Protection SOP-8, TO-252 and TO-263 Packages DESCRIPTION AIC1383B linear regulator is designed to achieve 3A source and sink current while regulating an output voltage to within 45mV. AIC1383B converts voltage supplies range from 1.6V to 6V into an output voltage that adjusts by two external voltage divider resistors. It provides an excellent voltage source for active termination schemes of highspeed transmission lines as those seen in high-speed memory buses, and it meets the JEDEC SSTL-2 and SSTL-3 specifications for termination of DDR-SRAM. Built-in current limiting in source and sink mode, with thermal shutdown provide maximal protection to the AIC1383B against fault conditions. APPLICATIONS Mother Board Graphic Cards DDR Termination Voltage Supply TYPICAL APPLICATION CIRCUIT VIN=2.5V + CIN 470F 1 2 3 VIN VOUT GND VCNTL VREF 5 R1 100K C1 100pF COUT 220F R2 100K + VOUT 4 VCNTL=3.3V + CCNTL 47F AIC1383B EN CES7002A Analog Integrations Corporation Si-Soft Research Center 3A1, No.1, Li-Hsin Rd. I, Science Park, Hsinchu 300, Taiwan, R.O.C. TEL: 886-3-5772500 FAX: 886-3-5772510 www.analog.com.tw DS-1383BP-03 010405 1 AIC1383B ORDERING INFORMATION AIC1383BXXX XX PACKING TYPE TR: TAPE & REEL PACKAGE TYPE M5: TO-263-5 E5: TO-252-5 S: SOP-8 C: COMMERCIAL P: LEAD FREE COMMERCIAL Example: AIC1383BCE5TR 3A Version, in TO-252-5 Package, Tape & Reel Packing Type AIC1383BPE5TR 3A Version, in Lead Free TO-252-5 Package, Tape & Reel Packing PIN CONFIGURATION TO-263-5 FRONT VIEW 1: VIN 2: GND 3. VCNTL 4. VREF 5: VOUT TO-252-5 TOP VIEW 1: VIN 2: GND 3. VCNTL 4. VREF 5: VOUT 12345 1234 5 SOP-8 TOP VIEW VIN 1 GND 2 VREF 3 VOUT 4 8 VCNTL 7 VCNTL 6 VCNTL 5 VCNTL ABSOLUTE MAXIMUM RATINGS Supply Voltage Operating Temperature Range Junction Temperature Storage Temperature Range Lead Temperature (Solder, 10sec) Thermal Resistance JC TO-263 TO-252 SO-8 Thermal Resistance JA (Assume no ambient airflow, no heatsink) TO-263 TO-252 SO-8 -0.4V to 7V -40C~85C 125C -65C ~150C 260C 3C /W 12.5C /W 40C /W 60C /W 100C /W 160C /W Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. 2 AIC1383B TEST CIRCUIT 2.5V 1 2 3 VIN GND VREF VCNTL AIC1383B 4 VOUT 5 VOUT + 1.25V COUT 10F 3.3V ELECTRICAL CHARACTERISTICS (VCNTL=3.3V, VIN=2.5V, VREF=0.5VIN, COUT=10F, TA=25C, unless otherwise specified) (Note 1) PARAMETER Input Voltage (DDR1/2) (Note2) Output Voltage Output Voltage Offset TEST CONDITIONS Keep operate VCNTLVIN at power on and off sequences IOUT = 0mA IOUT = 0mA SYMBOL VIN VCNTL VOUT VOS VLOR IQ ICNTL 0 IIL 3.2 4 -20 35 35 8 3 MIN. 1.6 3.0 TYP. 2.5 3.3 VREF 20 45 45 30 10 1 6.5 MAX. 6 6 UNIT V V mV mV A mA A A Load Regulation (DDR1/2) IOUT =0.1mA ~ +3A (Note2) Quiescent Current IOUT =0.1mA ~ -3A VREF<0.2V, VOUT = OFF Operating Current of VCNTL No load VREF Bias Current Current Limit THERMAL PROTECTION Thermal Shutdown Temperature Thermal Shutdown Hysteresis 3.3VVCNTL5V Guaranteed by design VREF=1.25V TSD 125 150 30 C C SHUTDOWN SPECIFICATIONS Shutdown Threshold Output ON (VREF=0V 1.25V) Output OFF (VREF=1.25V 0V) 0.8 0.2 V Note 1: Specifications are production tested at TA=25C. Specifications over the -40C to 85C operating temperature range are assured by design, characterization and correlation with Statistical Quality Controls (SQC). Note 2: DDR2 is not available for TO-263 package. Note 3: VOS is the voltage measurement, which is defined as VOUT subtracted VREF. Note 4: Load regulation is measured at constant junction temperature, using pulse testing with a low ON time. Note 5: Current limit is measured by pulsing a short time. Note 6: For operate system safely; VCNTL must be always greater than VIN. 3 AIC1383B TYPICAL PERFORMANCE CHARACTERISTICS 0.52 Threshold Voltage (V) 0.48 0.44 0.40 0.36 0.32 VIN=2.5V Threshold Voltage (V) VCNTL=3.3V 0.52 0.48 0.44 0.40 0.36 0.32 VCNTL=5V VIN=2.5V -20 0 20 40 60 80 100 120 40 20 0 20 40 60 80 100 120 Temperature (C) Fig. 1 Turn-On Threshold vs. Temp. Temperature (C) Fig. 2 Turn On Threshold vs. Temp. 6 Output Voltage Offset (mV) 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 -40 Sourcing Current (A) VCNTL=3.3V VIN=2.5V VREF=1.25V No Load 5 VCNTL=3.3V VIN=2.5V VREF=1.25V 4 3 -20 0 20 40 60 80 100 120 2 -40 -20 0 20 40 60 80 100 120 Temperature (C) Fig. 3 Output Voltage Offset vs. Temp. Temperature (C) Fig. 4 Current-Limit (Sourcing) vs. Temp. 6 Sinking Current (A) 5 VCNTL=3.3V VIN=2.5V VREF=1.25V VCNTL=3.3V VIN=2.5V, VREF=1.25V VOUT, 50mV/div IOUT, 2A/div 4 3 2 -40 -20 0 20 40 60 80 100 120 Temperature (C) Fig. 5 Current-Limit (Sinking) vs. Temp. Fig. 6 Transient Response at 1.25VTT/3A 4 AIC1383B TYPICAL PERFORMANCE CHARACTERISTICS VCNTL=3.3V VIN=2.5V VREF=1.25V VCNTL=3.3V VIN=2.5V VREF=1.25V (Continued) Iout, 2A/div Iout, 2A/div Fig. 7 Output Short-Circuit Protection (Sinking) Fig. 8 Output Short-Circuit Protection (Sourcing) BLOCK DIAGRAM VCNTL VIN + Control VREF VOUT Current Limit Thermal Shutdown VOUT Shutdown GND 5 AIC1383B PIN DESCRIPTIONS PIN 1: - Input supply pin. It provides main power to create the external reference voltage by divider resistors for regulating VREF and VOUT. GND - Ground pin. VCNTL - Input supply pin. It is used to supply all the internal control circuitry. VIN PIN 4: PIN 5: VREF - Reference voltage input. Pull this pin low to shutdown device. VOUT - Output pin. PIN 2: PIN 3: APPLICATION INFORMATION Layout Consideration AIC1383B is in SO-8 (DDR1/2) and TO-263-5 The large copper at VCNTL pins is available, and (DDR1/2), (DDR1) TO-252-5 packages the heat dissipation is relieved. Using via to lead heat into the bottom layer to strengthen as below figures show. All capacitors should be placed as close as possible to relative pins. resulting in unable to dissipate heat easily when it operates in high current. In order to prevent maximum junction temperature exceeded, the suitable copper area has to use. Fig. 9 Top layer of SO-8 Fig. 10 Bottom layer of SO-8 Fig. 11 Placement of SO-8 6 AIC1383B PHYSICAL DIMENSIONS (unit: mm) TO-263-5 A E L1 c2 S Y M B O L TO-263-5L MILLIMETERS MIN. 4.06 0.00 0.51 0.38 1.14 8.38 9.65 1.70 BSC 14.61 1.78 -0.25 BSC 0 8 15.88 2.79 1.68 MAX. 4.83 0.25 0.99 0.74 1.65 9.65 10.67 A A1 D H b c c2 D E A A e e SEE VIEW B H L L1 L3 b WITH PLATING c GAUGE PLANE SEATING PLANE A1 L3 L VIEW B 7 AIC1383B TO-252-5 E b3 L3 A c2 S Y M B O L TO-252-5L MILLIMETERS MIN. 2.19 0.00 0.51 4.32 0.46 0.46 5.33 6.35 1.27 BSC 9.40 1.40 2.67 REF 0.51 BSC 0.89 0 2.03 8 10.41 1.78 MAX. 2.38 0.13 0.71 5.46 0.61 0.89 6.22 6.73 A A1 b D b3 c c2 D E A A SEE VIEW B H e e H L L1 b WITH PLATING c L2 L3 BASE METAL SECTION A-A GAUGE PLANE SEATING PLANE L VIEW B A1 L2 L1 8 AIC1383B SOP-8 D S Y M B O L SOP-8 MILLIMETERS MIN. 1.35 0.10 0.33 0.19 4.80 3.80 1.27 BSC 5.80 0.25 0.40 0 6.20 0.50 1.27 8 MAX. 1.75 0.25 0.51 0.25 5.00 4.00 H E A A1 B C h X 45 A A D SEE VIEW B e E e H h L A B A1 WITH PLATING BASE METAL C 0.25 L VIEW B GAUGE PLANE SEATING PLANE Note: Information provided by AIC is believed to be accurate and reliable. However, we cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AIC product; nor for any infringement of patents or other rights of third parties that may result from its use. We reserve the right to change the circuitry and specifications without notice. Life Support Policy: AIC does not authorize any AIC product for use in life support devices and/or systems. Life support devices or systems are devices or systems which, (I) are intended for surgical implant into the body or (ii) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 9 |
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