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Global Mixed-mode Technology
Global Mixed-mode Technology

G2997 Datasheet Preview

G2997 Datasheet

DDR Termination Regulator

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G2997 pdf
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Global Mixed-mode Technology Inc.
DDR Termination Regulator
G2997
Features
„ Support Both DDR I (1.25VTT) and DDR II
(0.9 VTT) Requirements
„ Input Voltage Range: 3.3V to 5.5V
„ VLDOIN Voltage Range: 1.2V to 3.6V
„ Requires Only 20µF Ceramic Output Capaci-
tance
„ Supports High-Z in S3 and Soft-Off in S5
„ Integrated Divider Tracks 1/2 VDDQSNS for
Both VTT and VTTREF
„ Remote Sensing (VTTSNS)
„ ±20mV Accuracy for VTT and VTTREF
„ 10mA Buffered Reference (VTTREF)
„ Built-In Soft-Start
„ Over Current Protection
„ Thermal Shutdown Protection
„ MSOP-10 and MSOP-10(Exposed Pad) Package
Applications
„ DDR I/II Memory Termination
„ SSTL2, SSTL18
„ HSTL Termination
General Description
The G2997 is a 3A sink/source tracking termination
regulator. It is specifically designed for low-cost/
low-external component count systems. The G2997
maintains a high speed operational amplifier that pro-
vides fast load transient response and only requires
20µF (2x10µF) of ceramic output capacitance. The
G2997 supports remote sensing functions and all fea-
tures required to power the DDR I / DDR II VTT bus
termination according to the JEDEC specification. In
addition, the G2997 includes integrated sleep-state
controls placing VTT in High-Z in S3 (suspend to RAM)
and soft-off for VTT and VTTREF in S5 (Shutdown).
The G2997 is available in the thermally efficient 10pin
MSOP and MSOP (Exposed PAD).
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
G2997P7U G2997 -40°C~85°C
G2997F6U G2997 -40°C~85°C
Note: P7: MSOP-10 F6: MSOP-10 (FD)
U: Tape & Reel
(FD): Thermal Pad
PACKAGE
(Pb free)
MSOP-10
MSOP-10 (FD)
Pin Configuration
Typical Application Circuit
VDDQSNS 1
VLDOIN 2
VTT 3
PGND 4
VTTSNS 5
G2997
Top View
MSOP-10
10 VIN
9 S5
8 GND
7 S3
6 VTTREF
Thermal
Pad
Bottom View
Note: Recommend connecting the Thermal Pad to the GND for excellent power dissipation.
2.5V
C1
2*10µF
VDDQSNS
VLDOIN
VIN
S5
VTT GND
PGND
S3
VTTSNS VTTREF
VIN=5V
S5
S3
C2
0.1µF
Ver: 1.1
Jul 06, 2006
TEL: 886-3-5788833
http://www.gmt.com.tw
1



Global Mixed-mode Technology
Global Mixed-mode Technology

G2997 Datasheet Preview

G2997 Datasheet

DDR Termination Regulator

No Preview Available !

G2997 pdf
www.DataSheet4U.com
Global Mixed-mode Technology Inc.
G2997
Absolute Maximum Ratings (1)
Supply Voltage Range
VIN, VLDOIN, VTTSNS, VDDQSNS, S3, S5..-0.3V to +6V
PGND . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to 0.3V
Output Voltage Range
VTT, VTTREF . . . . . . . . . . . . . . . . . . . . . .-0.3V to 6V
Maximum Junction Temperature,TJ . . . . .. . . ..160°C
Storage Temperature Range, TSTG.-55°C to +160°C
Reflow Temperature (soldering, 10sec). . . . . 260°C
Thermal Resistance Junction to Ambient, (θJA)
MSOP-10 . . . . . . . . . . . . . . . . . . . . . . . . . . 120°C/W
MSOP-10 (FD) . . . . . . .. . . . . . . . . . . . . . . 60°C/W(3)
Recommend Operating Range (1) (2)
VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.3V to 5.5V
S3, S5 . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.1V to 5.5V
VDDQSNS. . . . . . . .. . . . . . . . . . . . . . . . .1.6V to 3.6V
VLDOIN . . . . . . . . . . . . . . . . . . . . . . . . . .1.2V to 3.6V
PGND . . . . . . . . . . . . . . . . . . . . . .-0.1V to 0.1V
Operating Ambient Temperature Range
TA . . . . . . . . . . . . . . . . . . . . . . . .. . . . .-40°C to 85°C
Note:
(1) All voltage values are with respect to the network ground terminal unless otherwise noted.
(2) VLDOIN, VTTSNS, VDDQSNS, S3, S5 must be lower than VIN on operation.
(3) Please refer to PCB size described in EV2997-10.
Electrical Characteristics
Specifications with standard typeface are for TA=25°C, VIN=5V, VLDOIN=2.5V and VDDQSNS=2.5V. Unless
otherwise specified.
PARAMETER
SYMBOL
CONDITIONS
Supply current, VIN
Standby current, VIN
Shutdown current, VIN
Supply current, VLDOIN
Standby current, VLDOIN
Shutdown current, VLDOIN
VDDQSNS input Impedance
VTTSNS input current
IVIN VVIN=5V, no load, S5=5V, S3 =5V
IVINSTB VVIN=5V, no load, S5=5V, S3 =0V
IVINSDN VVIN=5V, no load, S5=0V, S3 =0V
IVLDOIN VVIN=5V, no load, S5=5V, S3 =5V
IVLDOINSTB VVIN=5V, no load, S5=5V, S3 =0V
IVLDOINSDN VVIN=5V, no load, S5=0V, S3 =0V
ZVDDQSNS VVIN=5V, S5=5V, S3 =5V
IVTTSNS VVIN=5V, S5=5V, S3 =5V
VTT output voltage
VTT (DDR I/DDR II)
VTT Output Voltage Load Regula-
tion (VTTREF-VTT)
VOSVTT
IVTT=0
|IVTT|<1.5A
|IVTT|<3A
VTT Source Current limit
IVTTOCLSRC
VTT=VDDQSNS/2 *0.95, PGOOD=Hi
VTT=0
VTT Sink Current limit
VTT leakage current in S3 mode
VTT Discharge Current
VTTREF output voltage
VTTREF Voltage Load Regulation
High Level Input Voltage
Low Level Input Voltage
Logic input leakage current
Thermal Shutdown
IVTTOCLSNK
VTT=VDDQSNS/2 *1.05, PGOOD=Hi
VTT=VVDDQSNS
IVTTLK S3=0V, S5=5V
IDISCHARGE S5=0V, VDDQSNS=0, VTT=0.5V
VTTREF (DDR I/DDR II)
VTTREF |IVTTREF|<10mA
VIH S3 and S5 pin
VIL S3 and S5 pin
IILEAK S3 and S5 pin
TSD
Thermal Shutdown Hystersis
MIN
0.5
---
---
---
---
---
---
---
---
-20
-30
-40
3
1.5
3
1.5
---
10
---
-20
1.6
---
-1
---
---
TYP
0.8
110
---
0.03
0.1
0.1
200
0.3
1.25/0.9
---
---
---
4
2
4
2
0.01
20
1.25/0.9
---
---
---
---
160
20
MAX
2
200
1
2
10
1
---
1
---
20
30
40
---
---
---
---
---
---
---
20
---
1
1
---
---
UNIT
mA
µA
µA
mA
µA
µA
KΩ
µA
V
mV
A
A
µA
mA
V
mV
V
V
µA
°C
°C
Ver: 1.1
Jul 06, 2006
TEL: 886-3-5788833
http://www.gmt.com.tw
2


Part Number G2997
Description DDR Termination Regulator
Maker Global Mixed-mode Technology
Total Page 10 Pages
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