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G2998

Global Mixed-mode Technology
Part Number G2998
Manufacturer Global Mixed-mode Technology
Description DDR Termination Regulator
Published Jan 25, 2016
Detailed Description Global Mixed-mode Technology G2998/G2999 DDR Termination Regulator Features „ Support and DDR I (1.25VTT), DDR II (0....
Datasheet PDF File G2998 PDF File

G2998
G2998


Overview
Global Mixed-mode Technology G2998/G2999 DDR Termination Regulator Features „ Support and 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 „ VTT_IN Voltage Range: 1.
2V to 3.
6V „ Requires Only 20µF Ceramic Output Capacitance „ VTT Pulled Low by 2kΩ Resistor in Stand-By Mode (G2998 version) „ VTT Tri-State in Stand-By Mode (G2999 version) „ Integrated Divider Tracks 1/2 VDDQ for Both VTT and VREF „ Remote Sensing (VTTS) „ ±20mV Accuracy for VTT „ ±30mV Accuracy for VREF „ Built-In Soft-Start „ Over Current Protection „ Thermal Shutdown Protection „ MSOP-8 and SOP-8(Thermal Pad) Package low-external component count systems.
The G2998/ G2999 maintains a high speed operational amplifier that provides fast load transient response and only requires 20μF (2 × 10μF) of ceramic output capacitance.
The G2998/G2999 supports remote sensing functions and all features required to power the DDR I / DDR II / DDR III / DDR IIIL VTT bus termination according to the JEDEC specification.
In addition, the G2998/ G2999 also has an Enable (EN) pin that provides Suspend to RAM (STR) functionality.
When EN is pulled low, VREF will remain active, but VTT output will be turned off and discharged to the ground through internal MOSFETs in G2998 version and VTT output will be in tri-state in G2999 version.
A power saving advantage can be obtained in this mode through lowering the quiescent current to150μA @ VCC=3.
3V.
The G2998/G2999 is available in the MSOP-8 and SOP-8 package with the Thermal pad.
Ordering Information Applications „ DDR I/II/III/IIIL Memory Termination „ SSTL−2, SSTL−18 „ HSTL Termination General Description The G2998/G2999 is a 3A sink/source tracking termination regulator.
It is specifically designed for low-cost/ Pin Configuration ORDER NUMBER MARKING TEMP.
RANGE G2998P81U G2998 -40°C~85°C G2998F11U G2998 -40°C~85°C G2999F11U G2999 -40°C~85°C Note: P8: MSOP-8 F1: SOP-8 (FD) 1: B...


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