G2997 Datasheet, PDF (1/2 Pages) Global Mixed-mode Technology Inc – DDR Termination Regulator

Global Mixed-mode Technology
DDR Termination Regulator
G2997
Features
„ Support DDR I (1.25VTT), DDR II (0.9 VTT), DDR III
(0.75 VTT), and DDR IIIL (0.675VTT) Requirements
„ Input Voltage Range: 3V to 5.5V
„ VLDOIN Voltage Range: 1.2V to 3.6V
„ Requires Only 20µF Ceramic Output Capacitance
„ 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-8 (FD) , MSOP-10 (FD) & TDFN3X3-10
Package
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 (2×10µF) of ceramic output capacitance. The
G2997 supports remote sensing functions and all fea-
tures required to power the DDR I / DDR II /DDR III
/DDR IIIL 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 8pin, 10pin MSOP (Thermal Pad)
& 10pin TDFN.
Applications
„ DDR I/II/III/IIIL Memory Termination
„ SSTL−2, SSTL−18
„ HSTL Termination
Ordering Information
ORDER
NUMBER
MARKING
G2997F51U
G2997
G2997F6U
G2997
G2997RE1U
2997
Note: F5: MSOP-8(FD) F6: MSOP-10(FD) RE: TDF3X3-10
1: Bonding Code <only MSOP-8 (FD), TDFN3X3-10>
U: Tape & Reel
TEMP.
RANGE
-40°C~85°C
-40°C~85°C
-40°C~85°C
PACKAGE
(Green)
MSOP-8 (FD)
MSOP-10 (FD)
TDFN3X3-10
Pin Configuration
G2997
G2997
G2997
VDDQSNS 1
VLDOIN 2
VTTSNS/VTT 3
PGND 4
GND
MSOP-8 (FD)
8 VIN _VDDQSNS 1
7 S5
VLDOIN 2
6 S3
VTT 3
5 VTTREF PGND ⁴
VTTSNS 5
10 _VIN
VDDQSNS ¹
1100 _VIN
Thermal
Pad
9 S5
8 GND
7 S3
6 VTTREF
VLDOIN 2
VTT 3
PGND 4
VTTSNS 5
Thermal
Pad
9 S5
8 GND
7 S3
6 VTTREF
MSOP-10 (FD)
TDFN3X3-10
Note: Recommend connecting the Thermal Pad to the GND for excellent power dissipation.
Ver: 2.4
Sep 05, 2013
TEL: [phone]
http://www.gmt.com.tw
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