G2998

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 G29...