G2992B

G2992B
Global Mixed-mode Technology
2A DDR Bus Termination Regulator
Features
General Description
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The G2992B 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/ III -SDRAM. It contains a high-speed operational
amplifier that provides excellent response to the load
transients. This device can deliver 2A continuous current in the application such as required for DDR I/ II/ III
SDRAM termination. The G2992B 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 consumption can meet the low power consumption applications. The G2992B 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 advantage
can be obtained in this mode through lowering the quiescent current to 50μA @ VCNTL = 3.3V.
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VCNTL Supply Voltage: 3V to 5.5V
Termination Supply Voltage: 1.2V to 3.6V
Support DDR I(1.25VTT), DDR II (0.9 VTT), and
DDR III(0.75VTT) Requirements
Requires Only 20µF Ceramic Output Capacitor
Low Output Offset
2A 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
SOT-23-5, SOP-8 and MSOP-8 (FD) Package
Applications
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DDR-SDRAM Termination Voltage
DDR I / DDR II / DDRIII Termination Voltage
„ SSTL-18
„ SSTL-2
„ SSTL-3
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Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
(Green)
G2992BT11U
292Bx
-40°C to +125°C
SOT-23-5
G2992BP11U
G2992BF51U
G2992B
G2992B
-40°C to +125°C
-40°C to +125°C
SOP-8
MSOP-8 (FD)
Note: T1: SOT-23-5
P1: SOP-8
1: Bonding Code
U: Tape & Reel
F5: MSOP-8 (FD)
Pin Configuration
G2992B
GND
1
VCNTL
2
VIN
3
G2992B
5
4
SOT-23-5
VREF
VOUT
G2992B
VIN
1
8
VCNTL
VIN
1
GND
2
7
VCNTL
GND
2
VREF
3
6
VCNTL
VREF
3
VOUT
4
5
VCNTL
VOUT
4
SOP-8
Thermal
Pad
8
NC
7
NC
6
VCNTL
5
NC
MSOP-8 (FD)
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.8
May 07, 2013
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