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PDF AT9173 Data sheet ( Hoja de datos )
| Número de pieza | AT9173 | |
| Descripción | Bus Termination Regulator | |
| Fabricantes | AME | |
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AME
AT9173
Bus Termination Regulator
n General Description
The AT9173 is a voltage regulator which could
convert the input voltage ranging from 1.8V to 5V to an
output voltage that user settled. The regulator can
provide sourcing or sinking current.The AT9173, 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
Support Both DDR I (1.25VTT) and DDR II
(0.9VTT) Requirements
Capable of Sourcing and Sinking Current
Current-limiting Protection
Thermal Protection
Integrated Power MOSFETs
Generates Termination Voltages for SSTL-2
High Accuracy Output Voltage at Full-Load
Adjustable VOUT by External Resistors
Minimum External Components
Shutdown for Standby or Suspend Mode
Operation with High-impedance Output
n Applications
DDRI/DDRII Memory Termination Supply
Active Termination Buses
Desktop PC,NoTebook,Server and workstation
Graphic Card
Set Top Box
Embedded System
n Typical Application
DDR_2.5V
R2
100KΩ
C4
0.1uF
C2
470uF
AT9173A-SOP 8
1 VIN
VCNTL
8
2 GND
VCNTL
7
3 REFEN VCNTL 6
4 VOUT VCNTL 5
VCC_3.3V
DDR_VTT
1.25V/1.5A
R4
100KΩ
AT9173A
SOP-8
C8
4.7uF
C6
470uF
Rev. C.06
1
1 page  
AME
AT9173
n Absolute Maximum Ratings
Parameter
Input Voltage. VIN to GND
VCNTL to GND
ESD Rating (Human Body Mode)
Storage Temperature
Bus Termination Regulator
Symbol
VIN
V CNTL
V ESD
TSTG
Maximum
6
6
2
150
Unit
V
V
KV
OC
n Recommended Operating Conditions
Parameter
Symbol
Rating
Supply Voltage 1
VIN 1.8 or 2.5
Supply Voltage 2
VCNTL
3.3
Output Current of VOUT Pin *
*IOUT
-2 to +G92
Junction Temperature
TJ -25 to +125
*The symbol "+" means the VOUT sources current to load; the symbol "-" means the VOUT
sinks current to GND
n Thermal Characteristics
Parameter
Package
Die Attch Symbol Maximum
Thermal Resistance**
(Junction to Case)
Thermal Resistance
(Junction to Ambient)
Internal Power Dissipation
Solder Iron (10Sec) ***
SOP-8
SOP-8/PP
SOP-8
SOP-8/PP
SOP-8
SOP-8/PP
Non-Conductive
Epoxy
Conductive
Epoxy
Non-Conductive
Epoxy
Conductive
Epoxy
Non-Conductive
Epoxy
Conductive
Epoxy
θJC
θJA
PD
** Measure θJC on backside center of molding compund if IC has no tab.
*** MIL-STD-202G 210F
55
19
120
84
1300
1450
350
Rev. C.06
Unit
V
V
A
OC
Unit
OC/W
mW
OC
5
5 Page 
AME
AT9173
n Typical Characteristics
Bus Termination Regulator
Rev. C.06
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet AT9173.PDF ] | |
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