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G2996 Datasheet(PDF) 1 Page - Global Mixed-mode Technology Inc |
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G2996 Datasheet(HTML) 1 Page - Global Mixed-mode Technology Inc |
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1 / 13 page  Ver: 2.3 May 16, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw 1 G2996 Global Mixed-mode Technology Inc. DDR I/II Termination Regulator 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 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 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 continu- ous 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 pro- vide superior load regulation. The G2996 provides a VREF output as the reference for the applications of the chipset and DIMMs. The G2996 can easily provide the accurate VTT and VREF voltages without external resistors that PCB ar- eas 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 ac- tive. A power saving advantage can be obtained in this mode through lowering the quiescent current to180µA @ 2.5V. Ordering Information ORDER NUMBER ORDER NUMBER (Pb free) MARKING TEMP. RANGE PACKAGE G2996P1U G2996P1Uf G2996 -40°C to 85°C SOP-8 G2996F1U G2996F1Uf G2996 -40°C to 85°C SOP-8 (FD) Note: P1:SOP-8 F1:SOP-8(FD) U: Tape & Reel (FD): Thermal Pad Pin Configuration Typical Application Circuit VSENSE 8 6 5 1 2 3 4 SD GND VTT PVIN AVIN VDDQ SOP-8 G2996 7 VREF Thermal Pad + + + SD V REF V DDQ AV IN V SENSE PV IN V TT GND V TT=1.25V V REF=1.25V V DDQ=2.5V V DD=2.5V SD 47µF 220µF 0.01µF VSENSE 8 6 5 1 2 3 4 SD GND VTT PVIN AVIN VDDQ SOP-8 G2996 7 VREF Thermal Pad + + + SD V REF V DDQ AV IN V SENSE PV IN V TT GND V TT=1.25V V REF=1.25V V DDQ=2.5V V DD=2.5V SD 47µF 220µF 0.01µF |
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