G2995_15 Datasheet, PDF (2/2 Pages) Global Mixed-mode Technology Inc – DDR Termination Regulator

Global Mixed-mode Technology Inc.
G2996
DDR I/II Termination Regulator
Features
„ Operation Supply Voltage: 1.6V to 5.5V
„ Low Supply Current: 280µA @ 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-8 with Power-Pad Package
Applications
„ DDR-SDRAM Termination Voltage
„ DDR-I / DDR-II Termination Voltage
„ SSTL-2
„ SSTL-3
General Description
The G2996 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-SDRAM. It contains a high-speed operational
amplifier that provides excellent response to the load
transients. This device can deliver 1.5A/0.9A continu-
ous current and transient peaks up to 3A/1.8A in the
application as required for DDRI/II-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 chip-
set and DIMMs.
The G2996 can easily provide the accurate V_TT and
V_REF voltages without external resistors that PCB areas
can be reduced. The quiescent current is as low as
280µA @ 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 ac-
tive. A power saving advantage can be obtained in this
mode through lowering the quiescent current to180µA
@ 2.5V.
Ordering Information
ORDER NUMBER
(Pb free/Green)
MARKING
G2996F1Uf
G2996
Note: F1:SOP-8(FD)
U: Tape & Reel
(FD): Thermal Pad
Pin Configuration
GND 1
G2996
8 VTT
SD 2
VSENSE 3
Thermal
Pad
7 PVIN
6 AVIN
VREF 4
5 VDDQ
SOP-8(FD)
Note: Recommend connecting the Thermal Pad
to the GND for excellent power dissipation.
TEMP.
RANGE
-40°C to 85°C
PACKAGE
SOP-8 (FD)
Typical Application Circuit
SD
V_DDQ=2.5V
V_DD=2.5V
V_DD=2.5V
SD
V_DDQ
V_REF
AV_IN
V_SENSE
PV_IN
V_TT
GND
+
V_REF=1.25V
0.01µF
V_TT=1.25V
+
220µF
Ver: 3.0
Jul 06, 2009
TEL: [phone]
http://www.gmt.com.tw
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