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AME, Inc.
AME9172
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.
Bus Termination Regulator
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.
AME9172
n Block Diagram
VCNTL VIN
Bus Termination Regulator
Thermal Sensor Thermal
+ -
VOUT
&
Over Current REFEN Protection circuit
+ -
VCNTL
GND
2
Rev. A.01
AME, Inc.
AME9172
n Application Circuit
Bus Termination Regulator
DDR_2.5V
AME9172AAHAZ SOP-8 VIN GND REF VOUT VCNT VCNT VCNT VCNT
VCC_3V
1 R2 100K
C4 0.1 C2 470
8 7 6 5 DDR_VTT
1.25V/1.5A
2 3 4
R4 100K
C8 4.7u
C6 470u
AME9172AAHAZ SOP-8
Fig 1 : Application Circuit AME9172AAHAZ
DDR_2.5V 1
C3 R1 0.1 C4 470
AME9172AAZAZ SOP-8/PP VCC_3V VIN
GND_PAD
NC NC VCNT NC
8 7 6 5 DDR_VTT
1.25V/2A
2 3 4
GND REF VOUT
100K
R3 100K
C7 4.7
C5
470
AME9172AAZAZ SOP-8/PP
Fig 2 : Application Circuit AME9172AAZAZ
3
Rev. A.01
AME, Inc.
AME9172
n Pin Configuration
Part Number Pin Configurations
Bus Termination Regulator
VIN
AME9172AAHAZ (SOP-8)
1 2 3
8 7 6 5
VCNTL VCNTL VCNTL VCNTL
GND REFEN
VOUT 4
AME9172 Pin Assignment
Part Number
Pin Configurations
AME9172AAZAZ (SOP-8/PP)
VIN GND REFEN VOUT
1 2 3 4
8 7 6 5
NC NC VCNTL 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
n Ordering Information AME9172 xxxxx
Special Feature Number of Pins Package Type Operating Ambient Temperature Range Pin Configuration
Operating Ambient Temperature Range A: -25OC to 85OC Number of Pins A: 8
Bus Termination Regulator
Pin Configuration
Package Type
Special Feature
A: 1. VIN
(SOP-8) 2. GND
H: SOP Z: SOP/PP
Z: Lead free
3. 4. 5. 6. 7. 8.
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
AME9172AAHAZ
Marking*
9172 AAHA yyww 9172 AAZA yyww
Output Voltage
N/A
Package
SOP-8
Operating Ambient Temperature Range
-25oC to 85oC
AME9172AAZAZ
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.
AME9172
n Pin Description
Pin name
VIN GND VCNTL REFEN VOUT Power Input Ground Driving Voltage Input voltage reference & chip enable Output Voltage
Bus Termination Regulator
Pin Description
6
Rev. A.01
AME, Inc.
AME9172
n Absolute Maximum Ratings
Symbol
VIN PD VESD TSTG TL
Bus Termination Regulator
Parameter
Input Voltage. VIN to GND Power Disspation ESD Rating (Human Body Mode) Storage Temperature Lead Temperature (Soldering. 5sec)
Rating
6 Internally Limit 2 150 245
Unit
V W KV
O
C C
O
n Thermal Characteristics
Symbol Parameter
Thermal Resistance In Case JC SOP-8 SOP-8/PP 25.7 12
O
Symbol
Unit
C/W
n Recommended Operating Conditions
Symbol
VIN VCNT *IOUT TJ
Parameter
Supply Voltage to VIN Supply Voltage to VCNT Output Current of VOUT Pin * Junction Temperature
Rating
1.5 to 3.3 3.3 -2 to 2 -25 to 125
Unit
V V A
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.
AME9172
n Electrical Specifications
Limits in standard typeface are for TA = 25J, unless otherwise specified: DDR1 => VIN = 2.5V, VCNTL = 3.3V, VREFEN = 0.5VIN. (Note2)
Parameter Output Offset Voltage Load Regulation (DDR 1 / 2 / 3) Symbol VOS VLOAD Test Condition IOUT = 0A (Note 1) IL = 0 to 1.5A (Fig 4) IL = 0 to -1.5A DDR 1 Input Voltage Range (DDR 1 / 2 / 3) VIN Keep VCNTL VIN on operation power on and power off No Load DDR 2 DDR 3 DDR 1 / 2 / 3 Min -20 -20 -20 1.8 1.6 1.3 2.5 Typ 0 0 0 2.5 1.8 1.5 3.3 1.4 Max 20 20 20 4 4 4 6 mA V mV Units mV
Bus Termination Regulator
VCNTL Operating Current of VCNTL Short Circuit Protection DDR 1 / 2 / 3 Current Limit Over Temperature Protection Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
ICNTL
ILIMIT
Fig 6,7
2.0
A
TSD
3.3V VCNTL 5 V
Guaranteed by design
125
o
C
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
n Test Circuit
Bus Termination Regulator
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
n Typical Characteristics
Bus Termination Regulator
11
Rev. A.01
AME, Inc.
AME9172
n Operation Waveforms DDR1 Load Transient Response
VIN=2.5V, VCNTL =3.3V VREF is 1.25V supplied by a regulator COUT=1000F/35V IOUT slew rate = +-0.25A/mS
+ 0 A / + 1.5 A / + 0 A + 0 A / + 2 A / + 0 A + 0 A / + 2.5 A / + 0 A
Bus Termination Regulator
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=1000F/35V IOUT slew rate = +-0.25A/mS
- 0 A / - 1.5 A / - 0 A - 0 A / - 2 A / - 0 A - 0 A / - 2.5 A / - 0 A
Ch1= IOUT , Ch4= VOUT
12
Ch1= IOUT , Ch4= VOUT
Ch1= IOUT , Ch4= VOUT
Rev. A.01
AME, Inc.
AME9172
n Operation Waveforms DDR3 Load Transient Response
VIN=1.5V, VCNTL =3.3V VREF is 0.75V supplied by a regulator COUT=1000F/35V IOUT slew rate = +-0.25A/mS
+ 0 A / + 1.5 A / + 0 A + 0 A / + 2 A / + 0 A
Bus Termination Regulator
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=1000F/35V IOUT slew rate = +-0.25A/mS
- 0 A / - 1.5 A / - 0 A - 0 A / - 2 A / - 0 A
Ch1= IOUT , Ch4= VOUT
13
Ch1= IOUT , Ch4= VOUT
Rev. A.01
AME, Inc.
AME9172
n Tape and Reel Dimension
SOP-8
P
Bus Termination Regulator
PIN 1 W
AME AME
Carrier Tape, Number of Components Per Reel and Reel Size
Package SOP-8 Carrier Width (W) 12.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 2500pcs Reel Size 3301 mm
SOP-8/PP
P
PIN 1 W
AME AME
Carrier Tape, Number of Components Per Reel and Reel Size
Package SOP-8/PP
Carrier Width (W) 12.00.1 mm
Pitch (P) 4.00.1 mm
Part Per Full Reel 2500pcs
Reel Size 3301 mm
14
Rev. A.01
AME, Inc.
AME9172
n Package Dimension
SOP-8
SYMBOLS
Top View Side View C
Bus Termination Regulator
MILLIMETERS MIN MAX
1.75 0.30
INCHES MIN
0.05315
MAX
0.0689
A A1 A2
1.35 0.10
0.00394 0.01181 0.05799 REF 0.01299 0.02008 0.00748 0.00984 0.18898 0.20984 0.14961 0.15748 0.05000 BSC 0.01575 0.05000 0.22835 0.24803 0
o
1.473 REF 0.33 0.19 4.80 3.80 0.51 0.25 5.33 4.00
H
E
B C D
D
c
L
E e L H y
1.27 BSC 0.40 5.80 0
o
Front View
7o(4X)
1.27 6.30 0.10 8
o
A2
A
0.00394 8o
B
SOP-8/PP
SYMBOLS A A1 A2 C E E1 L b D e MILLIMETERS MIN
0.050 1.350 0.100 3.750 5.700 0.300 0.310 4.720
A1
e
INCHES MIN
0.002 0.053 0.004 0.148 0.224 0.012 0.012 0.186
MAX
1.700 0.150 1.550 0.250 4.150 6.300 0.700 0.510 5.120
MAX
0.067 0.006 0.061 0.010 0.163 0.248 0.028 0.020 0.202
1.270 BSC 0
o
0.05 BSC
o
8
0o
8o
15
Rev. A.01
www.ame.com.tw
E-Mail: sales@ame.com.tw
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. (c) AME, Inc. , September 2007 Document: 5007-DS9172-A.01
Corporate Headquarter
AME, Inc.
2F, 302 Rui-Guang Road, Nei-Hu District Taipei 114, Taiwan. Tel: 886 2 2627-8687 Fax: 886 2 2659-2989
U.S.A (Subsidiary)
Analog Microelectronics, Inc.
3100 De La Cruz Blvd., Suite 201 Santa Clara, CA. 95054-2046 Tel : (408) 988-2388 Fax: (408) 988-2489

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