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PDF G2997 Data sheet ( Hoja de datos )
| Número de pieza | G2997 | |
| Descripción | DDR Termination Regulator | |
| Fabricantes | Global Mixed-mode Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de G2997 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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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
SSTL−2, SSTL−18
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
1 page  
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Global Mixed-mode Technology Inc.
Typical Performance Characteristics (continued)
G2997
Start Up Waveforms S5 Low to High
Start Up Waveforms S5 Low to High
Start Up Waveforms S3 Low to High
Shutdown Waveforms S3 High to Low
Shutdown Waveforms S3 and S5 High to Low
VTTREF Voltage Transient Response
ILoad=±10mA
Ver: 1.1
Jul 06, 2006
TEL: 886-3-5788833
http://www.gmt.com.tw
5
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| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet G2997.PDF ] | |
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