AME, Inc. AME9172 Bus Termination Regulator n General Description The AME9172 is a voltage regulator which could convert the input voltage ranging from 1.3V to 6V to an output voltage that user settled. The regulator can provide sourcing or sinking current. The AME9172 used in conjunction with series termination resistors, provides 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. Current limits in both sourcing and sinking mode, plus on-chip thermal shutdown make the circuit tolerant of the output fault conditions. n Features l Support Both DDR 1 (1.25VTT), DDR 2 (0.9VTT) & DDR 3 (0.75VTT) Requirements l Capable of Sourcing and Sinking Current l Current-limiting Protection l Thermal Protection l Integrated Power MOSFETs l Generates Termination Voltages for SSTL-2 l High Accuracy Output Voltage at Full-Load l Adjustable VOUT by External Resistors l Minimum External Components l Shutdown for Standby or Suspend Mode Operation with High-impedance Output l All AME’s Lead Free Products Meet RoHS Standards n Applications l DDR Memory Termination Supply l Active Termination Buses l Desktop PC/AGP Graphics l Supply Splitters l Set Top Box/IPC 1 Rev. A.01 AME, Inc. Bus Termination Regulator AME9172 n Block Diagram VCNTL VIN Thermal Sensor Thermal + VOUT - & Over Current REFEN VCNTL Protection circuit + - GND 2 Rev. A.01 AME, Inc. AME9172 Bus Termination Regulator n Application Circuit AME9172AAHAZ SOP-8 DDR_2.5V 1 R2 100K C4 0.1µ C2 470µ 2 3 4 VIN VCNT GND VCNT REF VCNT VOUT VCNT VCC_3V 8 7 6 DDR_VTT 5 1.25V/1.5A R4 100K C8 4.7u C6 470u AME9172AAHAZ SOP-8 Fig 1 : Application Circuit AME9172AAHAZ AME9172AAZAZ SOP-8/PP DDR_2.5V VCC_3V C3 R1 0.1µ 100K C4 470µ 2 3 4 VIN NC GND NC REF VOUT GND_PAD 1 VCNT NC 8 7 6 5 DDR_VTT 1.25V/2A R3 100K C7 4.7µ C5 470µ AME9172AAZAZ SOP-8/PP Fig 2 : Application Circuit AME9172AAZAZ 3 Rev. A.01 AME, Inc. Bus Termination Regulator AME9172 n Pin Configuration Pin Configurations Part Number AME9172AAHAZ (SOP-8) VIN 1 8 VCNTL GND 2 7 VCNTL REFEN 3 6 VCNTL VOUT 4 5 VCNTL AME9172 Pin Assignment Pin Configurations Part Number AME9172AAZAZ (SOP-8/PP) VIN 1 8 NC GND 2 7 NC REFEN 3 6 VCNTL VOUT 4 5 NC NC= No internal connection = Thermal Pad (Connected to GND plane for better heat dissipation). The Pad of dimension is 0.090 x 0.090 (Inch) AME9172 Pin Assignment 4 Rev. A.01 AME, Inc. AME9172 Bus Termination Regulator n Ordering Information AME9172 x x x x x Special Feature Number of Pins Package Type Operating Ambient Temperature Range Pin Configuration Pin Configuration Operating Ambient Temperature Range A: 1. VIN A: -25OC to 85OC (SOP-8) 2. GND 3. 4. 5. 6. 7. 8. Package Type H: SOP Z: SOP/PP Number of Pins A: 8 Special Feature Z: Lead free REF VOUT VCNT VCNT VCNT VCNT A: 1. VIN (SOP-8/PP) 2. GND 3. REF 4. VOUT 5. NC 6. VCNT 7. NC 8. NC n Ordering Information Part Number Marking* Output Voltage Package Operating Ambient Temperature Range AME9172AAHAZ 9172 AAHA yyww N/A SOP-8 -25oC to 85oC AME9172AAZAZ 9172 AAZA yyww N/A SOP-8/PP -25oC to 85oC Note: yyww represents the date code. * A line on top of the first letter represents lead free plating such as 9172 Please consult AME sales office or authorized Rep./Distributor for package type availability. 5 Rev. A.01 AME, Inc. Bus Termination Regulator AME9172 n Pin Description Pin name VIN Power Input GND Ground VCNTL Driving Voltage REFEN Input voltage reference & chip enable VOUT 6 Pin Description Output Voltage Rev. A.01 AME, Inc. AME9172 Bus Termination Regulator n Absolute Maximum Ratings Symbol Parameter Rating Unit 6 V Internally Limit W 2 KV VIN Input Voltage. VIN to GND PD Power Disspation VESD ESD Rating (Human Body Mode) TSTG Storage Temperature 150 O C TL Lead Temperature (Soldering. 5sec) 245 O C n Thermal Characteristics Symbol Parameter Symbol Unit Thermal Resistance In Case θJC SOP-8 25.7 SOP-8/PP O C/W 12 n Recommended Operating Conditions Symbol Parameter VIN Supply Voltage to VIN VCNT Supply Voltage to VCNT *IOUT Output Current of VOUT Pin * TJ Junction Temperature Rating Unit 1.5 to 3.3 V 3.3 V -2 to 2 A -25 to 125 o C * The symbol "+" means the VOUT sources current to load; the symbol "-" means the VOUT sinks current to GND 7 Rev. A.01 AME, Inc. Bus Termination Regulator AME9172 n Electrical Specifications Limits in standard typeface are for TA = 25℃, unless otherwise specified: DDR1 => VIN = 2.5V, VCNTL = 3.3V, VREFEN = 0.5VIN. (Note2) Parameter Output Offset Voltage Load Regulation (DDR 1 / 2 / 3) Input Voltage Range (DDR 1 / 2 / 3) Test Condition Symbol VOS VLOAD VIN Min Typ Max Units IOUT = 0A (Note 1) -20 0 20 mV IL = 0 to 1.5A (Fig 4) -20 0 20 IL = 0 to -1.5A -20 0 20 DDR 1 1.8 2.5 4 DDR 2 1.6 1.8 4 DDR 3 1.3 1.5 4 DDR 1 / 2 / 3 2.5 3.3 6 Keep VCNTL ≥ VIN on operation power on and power off VCNTL Operating Current of VCNTL ICNTL No Load ILIMIT Fig 6,7 2.0 TSD 3.3V ≤ VCNTL≤ 5 V 125 1.4 mV V mA Short Circuit Protection DDR 1 / 2 / 3 Current Limit A Over Temperature Protection Thermal Shutdown Temperature Thermal Shutdown Hysteresis o C Guaranteed by design 30 Note1: VOS offset is the voltage measurement defined as VOUT subtracted from VREFEN. Note2: DDR3 => VIN = 1.5V, VCNTL = 3.3V, VREFEN = 0.5VIN 8 Rev. A.01 AME, Inc. AME9172 Bus Termination Regulator n Test Circuit Fig 4: Output Voltage Tolerance, △ VOUT Fig 5: Current in Shutdown Mode, ISHDN 9 Rev. A.01 AME, Inc. AME9172 Bus Termination Regulator Figure 6: Current Limit for High Side, ICLHIGH Figure 7: Current Limit for Low Side, ICLLOW 10 Rev. A.01 AME, Inc. AME9172 Bus Termination Regulator n Typical Characteristics 11 Rev. A.01 AME, Inc. Bus Termination Regulator AME9172 n Operation Waveforms DDR1 Load Transient Response VIN=2.5V, VCNTL =3.3V VREF is 1.25V supplied by a regulator COUT=1000µF/35V IOUT slew rate = +-0.25A/mS + 0 A → + 1.5 A → + 0 A +0A → +2A → + 0A + 0 A → + 2.5 A → + 0 A Ch1= IOUT , Ch4= VOUT Ch1= IOUT , Ch4= VOUT Ch1= IOUT , Ch4= VOUT - 0 A → - 1.5 A → - 0 A -0A → - 2A → - 0A - 0 A → - 2.5 A → - 0 A Ch1= IOUT , Ch4= VOUT Ch1= IOUT , Ch4= VOUT Ch1= IOUT , Ch4= VOUT Load Transient Response VIN=2.5V, VCNTL =3.3V VREF is 1.25V supplied by a regulator COUT=1000µF/35V IOUT slew rate = +-0.25A/mS 12 Rev. A.01 AME, Inc. AME9172 Bus Termination Regulator n Operation Waveforms DDR3 Load Transient Response VIN=1.5V, VCNTL =3.3V VREF is 0.75V supplied by a regulator COUT=1000µF/35V IOUT slew rate = +-0.25A/mS + 0 A → + 1.5 A → + 0 A +0A → +2A → + 0A Ch1= IOUT , Ch4= VOUT Ch1= IOUT , Ch4= VOUT Load Transient Response VIN=1.5V, VCNTL =3.3V VREF is 0.75V supplied by a regulator COUT=1000µF/35V IOUT slew rate = +-0.25A/mS 13 - 0 A → - 1.5 A → - 0 A -0A → -2A → - 0A Ch1= IOUT , Ch4= VOUT Ch1= IOUT , Ch4= VOUT Rev. A.01 AME, Inc. Bus Termination Regulator AME9172 n Tape and Reel Dimension SOP-8 P PIN 1 W AME AME Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SOP-8 12.0±0.1 mm 4.0±0.1 mm 2500pcs 330±1 mm SOP-8/PP P PIN 1 W AME AME Carrier Tape, Number of Components Per Reel and Reel Size 14 Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SOP-8/PP 12.0±0.1 mm 4.0±0.1 mm 2500pcs 330±1 mm Rev. A.01 AME, Inc. AME9172 Bus Termination Regulator n Package Dimension SOP-8 SYMBOLS Top View MAX MIN MAX A 1.35 1.75 0.05315 0.0689 A1 0.10 0.30 0.00394 0.01181 A2 E H D L θ Front View e A1 A A2 7o(4X) INCHES MIN Side View C MILLIMETERS 1.473 REF 0.05799 REF B 0.33 0.51 0.01299 0.02008 C 0.19 0.25 0.00748 0.00984 D 4.80 5.33 0.18898 0.20984 E 3.80 4.00 0.14961 0.15748 1.27 BSC e 0.05000 BSC L 0.40 1.27 0.01575 0.05000 H 5.80 6.30 0.22835 0.24803 y - 0.10 θ 0 o 8 o 0 0.00394 o 8o B SOP-8/PP SYMBOLS INCHES MIN MAX MIN MAX A - 1.700 - 0.067 A1 0.050 0.150 0.002 0.006 A2 1.350 1.550 0.053 0.061 C 0.100 0.250 0.004 0.010 E 3.750 4.150 0.148 0.163 E1 5.700 6.300 0.224 0.248 L 0.300 0.700 0.012 0.028 b 0.310 0.510 0.012 0.020 D 4.720 5.120 0.186 0.202 e θ 15 MILLIMETERS 1.270 BSC 0 o 8 0.05 BSC o 0o 8o Rev. A.01 www.ame.com.tw E-Mail: [email protected] Life Support Policy: These products of AME, Inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president of AME, Inc. AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and advises its customers to obtain the latest version of relevant information. AME, Inc. , September 2007 Document: 5007-DS9172-A.01 Corporate Headquarter U.S.A (Subsidiary) AME, Inc. Analog Microelectronics, Inc. 2F, 302 Rui-Guang Road, Nei-Hu District 3100 De La Cruz Blvd., Suite 201 Taipei 114, Taiwan. Tel: 886 2 2627-8687 Santa Clara, CA. 95054-2046 Tel : (408) 988-2388 Fax: 886 2 2659-2989 Fax: (408) 988-2489