G2995 Global Mixed-mode Technology Inc. DDR Termination Regulator General Description Features Operation Supply Voltage: 1.6V to 5.5V Low Supply Current: 280µA @ 2.5V Low Output Offset Source and Sink Current Low External Component Count No Inductor Required No external Resistors Required Thermal Shutdown Protection SOP-8 with Power-Pad package The G2995 is a linear regulator designed to meet the JEDEC SSTL-2 and SSTL-3 (Series Stub Termination Logic) specifications for termination of DDR-SDRAM. It contains a high-speed operational amplifier that provides excellent response to the load transients. This device can deliver 1.5A continuous current and transient peaks up to 3A in the application as required for DDR-SDRAM termination. With an independent VSENSE pin, the G2995 can provide superior load regulation. The G2995 provides a VREF output as the reference for the applications of the chipset and DIMMs. Applications DDR-SDRAM Termination Voltage DDR-I / DDR-II Termination Voltage SSTL-2 SSTL-3 The G2995 can easily provide the accurate VTT and VREF voltages without external resistors that PCB areas can be reduced. The quiescent current is as low as 280µA @ 2.5V. So the power consumption can meet the low power consumption applications. Ordering Information ORDER NUMBER (Pb free/Green) MARKING TEMP. RANGE G2995P1Uf G2995 -40°C to 85°C SOP-8 G2995F1Uf G2995 -40°C to 85°C SOP-8 (FD) Note: P1:SOP-8 U: Tape & Reel F1:SOP-8(FD) (FD): Thermal Pad Pin Configuration Typical Application Circuit G2995 G2995 NC 8 1 NC VTT 2 7 PVIN GND 2 VSENSE 3 6 AVIN VSENSE 3 VREF 4 4 5 SOP-8 VDDQ 8 1 GND VREF PACKAGE Thermal Pad VTT 7 PVIN 6 AVIN 5 VDDQ VDDQ=2.5V VDDQ VDD=2.5V AVIN VDD=2.5V PVIN VREF + VREF=1.25V 0.01µF VSENSE VTT GND VTT=1.25V + 220µF SOP-8 (FD) Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 2.0 Apr 14, 2009 1 G2996 Global Mixed-mode Technology Inc. DDR I/II Termination Regulator Features General Description The G2996 is a linear regulator designed to meet the JEDEC SSTL-18, SSTL-2 and SSTL-3 (Series Stub Termination Logic) specifications for termination of DDR-SDRAM. It contains a high-speed operational amplifier that provides excellent response to the load transients. This device can deliver 1.5A/0.9A continuous current and transient peaks up to 3A/1.8A in the application as required for DDRI/II-SDRAM termination. With an independent VSENSE pin, the G2996 can provide superior load regulation. The G2996 provides a VREF output as the reference for the applications of the chipset and DIMMs. Operation Supply Voltage: 1.6V to 5.5V Low Supply Current: 280µA @ 2.5V Low Output Offset Source and Sink Current Low External Component Count No Inductor Required No external Resistors Required Thermal Shutdown Protection Suspend to RAM (STR) Function SOP-8 with Power-Pad Package Applications DDR-SDRAM Termination Voltage DDR-I / DDR-II Termination Voltage SSTL-2 SSTL-3 The G2996 can easily provide the accurate VTT and VREF voltages without external resistors that PCB areas can be reduced. The quiescent current is as low as 280µA @ 2.5V. So the power consumption can meet the low power consumption applications. The G2996 also has an active low shutdown ( SD ) pin that provides Suspend to RAM (STR) functionality. When SD is pulled low, the VTT output will be tri-state providing a high impendence, but VREF will remain active. A power saving advantage can be obtained in this mode through lowering the quiescent current to180µA @ 2.5V. Ordering Information ORDER NUMBER (Pb free/Green) MARKING TEMP. RANGE PACKAGE G2996F1Uf G2996 -40°C to 85°C SOP-8 (FD) Note: F1:SOP-8(FD) U: Tape & Reel (FD): Thermal Pad Pin Configuration Typical Application Circuit G2996 GND 1 SD 2 VSENSE 3 VREF 4 8 Thermal Pad VTT 7 PVIN 6 AVIN 5 VDDQ SD SD VDDQ=2.5V VDDQ VDD=2.5V AVIN VDD=2.5V PVIN VREF + VREF=1.25V 0.01µF VSENSE VTT GND VTT=1.25V + 220µF SOP-8(FD) Note: Recommend connecting the Thermal Pad to the GND for excellent power dissipation. Ver: 3.0 Jul 06, 2009 TEL: 886-3-5788833 http://www.gmt.com.tw 1