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G2996 Datasheet

  • G2996

  • DDR Termination Regulator with STR function.|Terminator Seri...

  • 12頁(yè)

  • ETC

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Global Mixed-mode Technology Inc.
G2996
DDR Termination Regulator
Features
Operation Supply Voltage: 2V to 5.5V
Low Supply Current: 230碌A(chǔ) @ 2.5V
Low Output Offset
Source and Sink Current
Low External Component Count
No Inductor Required
No external Resistors Required
Thermal Shutdown Protection
Suspend to RAM (STR) function
SOP-8L with Power-Pad package
General Description
The G2996 is a linear regulator designed to meet the
JEDEC SSTL-2 and SSTL-3 (Series Stub Termination
Logic) specifications for termination of DDR-SDRAM.
It contains a high-speed operational amplifier that pro-
vides excellent response to the load transients. This
device can deliver 1.5A continuous current and tran-
sient peaks up to 3A in the application as required for
DDR-SDRAM termination. With an independent V
SENSE
pin, the G2996 can provide superior load regulation.
The G2996 provides a V
REF
output as the reference for
the applications of the chipset and DIMMs.
The G2996 can easily provide the accurate V
TT
and
V
REF
voltages without external resistors that PCB ar-
eas can be reduced. The quiescent current is as low
as 230碌A(chǔ) @ 2.5V. So the power consumption can
meet the low power consumption applications.
The G2996 also has an active low shutdown ( SD ) pin
that provides Suspend To RAM (STR) functionality.
When SD is pulled low, the V
TT
output will be
tri-state providing a high impendence, but V
REF
will
remain active. A power saving advantage can be ob-
tained in this mode through lowering the quiescent
current to130碌A(chǔ) @ 2.5V.
Applications
DDR-SDRAM Termination Voltage
DDR-I / DDR-II Termination Voltage
SSTL-2
SSTL-3
Ordering Information
ORDER
NUMBER
G2996P1X
G2996F1X
MARKING
G2996
G2996
TEMP.
RANGE
PACKAGE
-40擄C to 85擄C
SOP-8L
-40擄C to 85擄C SOP-8L (FD)*
Note: X Specify the packing type
U: Tape & Reel
T: Tube
*
SOP-8L (FD): Thermal Pad
Pin Configuration
Typical Application Circuit
G2996
GND
SD
VSENSE
VREF
1
2
3
4
8
7
6
5
VTT
PVIN
AVIN
VDDQ
SD
V
DDQ
=2.5V
Thermal
Pad
V
DD
=2.5V
SD
V
DDQ
AV
IN
PV
IN
47碌F
+
V
REF
+
V
REF
=1.25V
0.01碌F
V
SENSE
V
TT
GND
+
V
TT
=1.25V
220碌F
8Pin SOP
Ver: 1.0
May 23, 2003
TEL: 886-3-5788833
http://www.gmt.com.tw
1

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