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PDF G2992 Data sheet ( Hoja de datos )
| Número de pieza | G2992 | |
| Descripción | 3A DDR Bus Termination Regulator | |
| Fabricantes | Global Mixed-mode Technology | |
| Logotipo |  |
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Global Mixed-mode Technology Inc.
G2992
3A DDR Bus Termination Regulator
Features
VCNTL Supply Voltage: 3.3V to 5.5V
Termination Supply Voltage: 1.8V to 3.6V
Support Both DDR I(1.25VTT) and DDR II (0.9
VTT) Requirements
Requires Only 20µF Ceramic Output Capacitor
Low Output Offset
3A Source and Sink Current
Low External Component Count
No Inductor Required
Thermal Shutdown Protection
Over Current Protection
Suspend to RAM (STR) Function with
High-impedance output
SOP-8 (FD) Package
Applications
DDR-SDRAM Termination Voltage
DDR I / DDR II Termination Voltage
SSTL-18
SSTL-2
SSTL-3
General Description
The G2992 is a linear regulator designed to meet the
JEDEC SSTL-18, SSTL-2 and SSTL-3 (Series Stub
Termination Logic) specifications for termination of
DDR I / II -SDRAM. It contains a high-speed opera-
tional amplifier that provides excellent response to the
load transients. This device can deliver 3A continuous
current in the application such as required for DDR I/ II
SDRAM termination. The G2992 can easily provide
the accurate VTT voltage with two external resistors
generating reference voltage. The quiescent current is
as low as 750µA @ VCNTL = 3.3V. So the power con-
sumption can meet the low power consumption appli-
cations. The G2992 also has a shutdown function by
setting VREF smaller than 0.2V, that provides Suspend
to RAM (STR) functionality. When in the shutdown
mode, the VTT output (on VOUT pin) will be tri-state
providing a high impendence. A power saving advan-
tage can be obtained in this mode through lowering
the quiescent current to 50μA @ VCNTL = 3.3V.
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
G2992F1U G2992 -40°C to +85°C
Note: U: Tape & Reel
(FD): Thermal Pad
PACKAGE
(Pb free)
SOP-8 (FD)
Pin Configuration
Typical Application Circuit
G2992
VIN 1
8 NC
GND 2
7 NC
VREF 3
VOUT 4
SOP-8(FD)
6 VCNTL
5 NC
VCNTL=3.3V
VIN=2.5V
2N7002
EN
R1 VIN VCNTL
VREF
VOUT
R2 CSS
GND
CIN CCNTL
RTT
COUT RDUMMY
Ver: 1.0
Aug 29, 2006
TEL: 886-3-5788833
http://www.gmt.com.tw
1
1 page  
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Global Mixed-mode Technology Inc.
Typical Performance Characteristics (continued)
G2992
VCNTL Supply Current vs Temperature
1
0.95
0.9
0.85
0.8
0.75
0.7
0.65
-40 -20
VCNTL=5.0V,VIN=2.5V
0 20 40 60 80 100 120
Temperature (°C)
VCNTL Supply Current vs. VCNTL
Supply Voltage
1
0.95
TA=120°C
0.9
0.85
TA=25°C
0.8
0.75
0.7 TA=0°C
0.65
3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4 5.7
VCNTL Supply Voltage (V)
6
VCNTL Shutdown Current vs Temperature
62
60
58
56
54
52
50
48 VCNTL=5.0V,VIN=2.5V
46
-40 -20
0 20 40 60 80 100 120
Temperature (°C)
VCNTL Shutdown Current vs VCNTL
Supply Voltage
69
66
63
60 TA=120°C
57
54 TA=25°C
51
48 TA=0°C
45
3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4 5.7
VCNTL Supply Voltage (V)
6
VIN Dropout Voltage vs Output Current
1.2
VREF=0.9V
1 VCNTL=3.3V
0.8
TA=25°C
TA=75°C
0.6
TA=125°C
0.4
0.2
0
0
TA=-50°C
0.5 1 1.5 2 2.5 3
Output Current (A)
Ver: 1.0
Aug 29, 2006
5
Recommended Minimum Footprint
SOP-8 (FD)
TEL: 886-3-5788833
http://www.gmt.com.tw
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet G2992.PDF ] | |
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