DATASHEET SEARCH SITE | WWW.ALLDATASHEET.COM
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 2
Technical content
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
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 V SENSE pin, the G2995 can provide superior load regulation. The G2995 provides a V REF output as the reference for the applications of the chipset and DIMMs. The G2995 can easily provide the accurate V TT and VREF voltages without external resistors that PCB ar- eas can be reduced. The quiescent current is as low as 280 µA @ 2.5V. So the power consumption can meet the low power consumption applications.
Ordering Information
(Pb free/Green) MARKING TEMP. RANGE PACKAGE G2995P1Uf G2995 -40 °C to 85°C SOP-8 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 VREF VSENSE SOP-8 (FD) G2995 NC GND VTT PVIN AVIN VDDQ Thermal Pad VREF VSENSE SOP-8 G2995 NC GND VTT PVIN AVIN VDDQ + VREFVDDQ AVIN VSENSE PVIN VTT GND VTT=1.25V VREF=1.25VVDDQ=2.5V 220µF 0.01µF VDD=2.5V VDD=2.5V Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. VREF VSENSE SOP-8 (FD) G2995 NC GND VTT PVIN AVIN VDDQ Thermal Pad VREF VSENSE SOP-8 G2995 NC GND VTT PVIN AVIN VDDQ + VREFVDDQ AVIN VSENSE PVIN VTT GND VTT=1.25V VREF=1.25VVDDQ=2.5V 220µF 0.01µF VDD=2.5V VDD=2.5V Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
Ver: 3.0 Jul 06, 2009 TEL: 886-3-578883 3 http://www.gmt.com.tw G2996 Global Mixed-mode Technology Inc. DDR I/II Termination Regulator 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 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 V SENSE pin, the G2996 can provide superior load regulation. The G2996 provides a V REF output as the reference for the applications of the chip- set and DIMMs. The G2996 can easily provide the accurate V TT 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 V TT output will be tri-state providing a high impendence, but V REF will remain ac- tive. A power saving advantage can be obtained in this mode through lowering the quiescent current to180 µA @ 2.5V. (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 SD V REF VDDQ AVIN VSENSE PVIN VTT GND VTT=1.25V VREF=1.25V VDDQ=2.5V SD 220µF 0.01µF VSENSE SD GND VTT PVIN AVIN VDDQ SOP-8(FD) G2996 VREF Thermal Pad Note: Recommend connecting the Thermal Pad to the GND for excellent power dissipation. VDD=2.5V VDD=2.5V SD V REF VDDQ AVIN VSENSE PVIN VTT GND VTT=1.25V VREF=1.25V VDDQ=2.5V SD 220µF 0.01µF VSENSE SD GND VTT PVIN AVIN VDDQ SOP-8(FD) G2996 VREF Thermal Pad Note: Recommend connecting the Thermal Pad to the GND for excellent power dissipation. VDD=2.5V VDD=2.5V