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G2995 Datasheet(PDF) 1 Page - Global Mixed-mode Technology Inc |
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G2995 Datasheet(HTML) 1 Page - Global Mixed-mode Technology Inc |
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1 / 12 page  Ver: 1.7 May 10, 2005 TEL: 886-3-5788833 http://www.gmt.com.tw 1 G2995 Global Mixed-mode Technology Inc. DDR 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 SOP-8L with Power-Pad package Applications DDR-SDRAM Termination Voltage DDR-I / DDR-II Termination Voltage SSTL-2 SSTL-3 General Description 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 pro- vides excellent response to the load transients. This device can deliver 1.5A continuous current and tran- sient 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. The G2995 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. Ordering Information ORDER NUMBER ORDER NUMBER (Pb free) MARKING TEMP. RANGE PACKAGE G2995P1U G2995P1Uf G2995 -40°C to 85°C SOP-8 G2995F1U G2995F1Uf G2995 -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 GND VTT PVIN AVIN VDDQ SOP-8 G2995 7 VREF Thermal Pad + + + 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 47µF 220µF 0.01µF NC VSENSE 8 6 5 1 2 3 4 GND VTT PVIN AVIN VDDQ SOP-8 G2995 7 VREF Thermal Pad + + + 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 47µF 220µF 0.01µF NC |
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