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Part Name(s) : RT9173 RT9173A RT9173AGL5 RT9173AGM5 RT9173AGS RT9173APL5 RT9173APM5 RT9173APS RT9173GL5 RT9173GM5 RT9173GS RT9173PL5 RT9173PM5 RT9173PS Richtek
Richtek Technology
Description : Peak 3A BUS TERMINATION REGULATOR

General Description
The RT9173/A REGULATOR is designed to convert voltage supplies ranging from 1.6V to 6V into a desired output voltage which adjusted by two external voltage divider resistors. The REGULATOR is capable of sourcing or sinking up to 3A of peak current while regulating an output voltage to within 2% (DDR 1) and 3% (DDR 2) or less.
The RT9173/A, used in conjunction with series TERMINATION resistors, provides an excellent voltage source for active TERMINATION schemes of high speed transmission lines as those seen in high speed memory BUSes and distributed backplane designs. The voltage output of the REGULATOR can be used as a TERMINATION voltage for DDR SDRAM.

Features
• Support Both DDR 1 (1.25VTT) and DDR 2 (0.9VTT) Requirements
• SOP-8, TO-252-5 and TO-263-5 Packages
• Capable of Sourcing and Sinking 3A Peak Current
• Current-limiting Protection
• Thermal Protection
• Integrated Power MOSFETs
• Generates TERMINATION Voltages for SSTL-2
• High Accuracy Output Voltage at Full-Load
• Adjustable VOUT by External Resistors
• Minimum External Components
• Shutdown for Standby or Suspend Mode Operation with High-impedance Output
• RoHS Compliant and 100% Lead (Pb)-Free

Applications
DDR Memory TERMINATION
• Active TERMINATION BUSes
• Supply Splitter

 

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Part Name(s) : FP6137A FP6137ASFGTR FP6137ASFPTR FP6137ASPGTR FP6137ASPPTR FP6137AT5GTR FP6137AT5PTR FP6137AT6GTR FP6137AT6PTR FP6137B FP6137BSFGTR FP6137BSFPTR FP6137BSPGTR FP6137BSPPTR FP6137BT5GTR FP6137BT5PTR FP6137BT6GTR FP6137BT6PTR ETC
Unspecified
Description : 3A/2A BUS TERMINATION REGULATOR

Description
The FP6137A/B linear REGULATOR is designed to provide the transient peaks up to 3A/2A sourcing or sinking capability for DDR SDRAM BUS TERMINATION application. The output voltage can track half of input power by two external voltage divider resistors. The FP6137A/B provides current limit in both sourcing/sinking mode and thermal shutdown function which protects the excessive heating due to high current and high junction temperature.

Features
3A/2A Source or Sink Current
● Power MOSFET Integrated
● Low Output Voltage Offset
● Current Limit Protection
● Thermal Shutdown Protection
● Adjusted Output by External Resistors
● Shutdown for Standby or Suspend Mode
● SOP-8, TO-252-5 and TO-263-5 Packages
● RoHS Compliant

Applications
DDR-I and DDR-II BUS TERMINATION Voltage
● SSTL-2 and SSTL-3 TERMINATION
● Active TERMINATION BUSes

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Part Name(s) : ML6554CU ML6554IU ML6554 Fairchild
Fairchild Semiconductor
Description : 3A BUS TERMINATION REGULATOR

Description
The ML6554 switching REGULATOR is designed to convert voltage supplies ranging from 2.3V to 4V into a desired output voltage or TERMINATION voltage for various applications.
   
Features
• Can source and sink up to 3A, no heat sink required
• Integrated Power MOSFETs
• Generates TERMINATION voltages for DDR SDRAM,
    SSTL-2 SDRAM, SGRAM, or equivalent memories
• Generates TERMINATION voltages for active TERMINATION
    schemes for DDR SDRAM, GTL+, RamBUS, VME,
    LV-TTL, HSTL, PECL and other high speed logic
• VREF input available for external voltage divider
• Separate voltages for VCCQ and PVDD
• Buffered VREF output
• VOUT of ±3% or less at 3A
• Minimum external components
• Shutdown for standby or suspend mode operation
• 0° to +70°C and -40° to +85°C temperature ranges
    available
• Thermal Shutdown ≈ 130ºC
   

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Part Name(s) : AP1250GH AP1250GM APEC
Advanced Power Electronics Corp
Description : 1.5A / 3A BUS TERMINATION REGULATOR

General Description
AP1250GM/H is a linear REGULATOR designed as a cost-effective solution for active TERMINATION of DDR SDRAM. The converting voltage range is from 1.6V to 6V into a desired output voltage, which is adjusted by two external resistors. The current sourcing and sinking capability of the REGULATOR is up to 1.5A/3A while the output voltage within 2%/3%.

Features
▼Ideal for DDR-I and DDR-II applications
▼Capable of sourcing and sinking current 1.5A/3A
▼Current limiting protection
▼Thermal protection
▼Current-shoot-through protection
▼High accuracy output voltage at full load
▼Minimum external components
▼Adjustable VOUTby external resistors
▼Shutdown for standby or suspend mode operation with high-impedance output

 

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Part Name(s) : FAN6550 Fairchild
Fairchild Semiconductor
Description : 2A DDR BUS TERMINATION REGULATOR

Description
The FAN6550 switching REGULATOR is designed to convert voltage supplies ranging from 2.3V to 4V into a desired output voltage or TERMINATION voltage for DDR SDRAM memory. The FAN6550 can be implemented to produce regulated output voltages in two different modes. In the default mode, when the VREF pin is open, the FAN6550 output voltage is 50% of the voltage applied to VCCQ. The FAN6550 can also be used to produce various user-defined voltages by forcing a voltage on the VREFIN pin. In this case, the output voltage follows the input VREFIN voltage. The switching REGULATOR is capable of sourcing or sinking up to 2A of current while regulating an output VTT voltage to within 3% or less. Transient output currents of ±3A can also be accommodated.

Features
• Can source and sink up to 2A continous, 3A peak
• No heatsink required
• Integrated Power MOSFETs
• Generates TERMINATION voltages for DDR SDRAM
• VREF input available for external voltage divider
• Separate voltages for VCCQ and PVDD
• Buffered VREF output
• VOUT of ±3% or less at 2A
• Minimum external components
• 0°C to 70°C operating range
• Shutdown for standby or suspend mode operation
• Thermal Shutdown ≈ 130ºC

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Part Name(s) : CM3107 CM3107-00SB CM3107-12SH CM3107-00SH CM3107-00SN CM310701S CM3107-00SM CALMIRCO
California Micro Devices Corp
Description : 2 Amp Source/ Sink BUS TERMINATION REGULATOR for DDR Memory and Front Side BUS Applications

Product Description
The CM3107 is a sinking and sourcing REGULATOR specifically designed for series-parallel BUS TERMINATION for high-speed chip set BUSses as well as DDR memory systems. It can source and sink current up to 2.0A with a load regulation of 0.5%. The VTT output voltage is selectable by VDDQSEL and FSBSEL pins. The VDDQSEL pin controls whether the CM3107 is in DDR memory mode with VTT=VDDQ/2, or in FSB mode. In FSB mode, FSBSEL controls whether VTT is 1.225V or 1.45V. This allows the same chip to be used in two different circuits on an Intel 865-based motherboard.

Features
• Ideal for Intel 865 Front Side BUS VTT and DDR VTT applications
• Sinks and sources 2 Amps
• Over current protection
• Over temperature protection
• Integrated power MOSFETs
• Excellent accuracy (0.5% load regulation)
• Selectable output (1.225V/1.45V or VDDQ/2)
• 8-lead SOIC and PSOP packages
• Lead-free versions available

Applications
• Intel 865/845 Front Side BUS TERMINATION
• Single and dual DDR memory TERMINATION
• Active TERMINATION BUSes
• Graphics card DDR memory TERMINATION

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Part Name(s) : RT9173D RT9173DGSP RT9173DPSP Richtek
Richtek Technology
Description : Cost-Effective, Peak 3A Sink/Source BUS TERMINATION REGULATOR

General Description
The RT9173D is a simple, cost-effective and high-speed linear REGULATOR designed to generate TERMINATION voltage in double data rate (DDR) memory system to comply with the JEDEC SSTL_2 and SSTL_18 or other specific interfaces such as HSTL, SCSI-2 and SCSI-3 etc. devices requirements. The REGULATOR is capable of actively sinking or sourcing continuous 2A or up to 3A transient peak current while regulating an output voltage to within 40mV. The output TERMINATION voltage cab be tightly regulated to track 1/2VDDQ by two external voltage divider resistors or the desired output voltage can be pro-grammed by externally forcing the REFEN pin voltage.

Features
Ideal for DDR-I, DDR-II and DDR-III VTT Applications
Sink and Source Current
  2A Continuous Current
  Peak 3A for DDRI and DDRII
  Peak 2.5A for DDRIII
Integrated Power MOSFETs
Generates TERMINATION Voltage for SSTL_2, SSTL _18, HSTL, SCSI-2 and SCSI-3 Interfaces
High Accuracy Output Voltage at Full-Load
Output Adjustment by Two External Resistors
Low External Component Count
Shutdown for Suspend to RAM (STR) Functionality with High-Impedance Output
Current Limiting Protection
On-Chip Thermal Protection
Available in SOP-8 (Exposed Pad) Packages
VIN and VCNTL No Power Sequence Issue
RoHS Compliant and 100% Lead (Pb)-Free

Applications
Desktop PCs, Notebooks, and Workstations
Graphics Card Memory TERMINATION
Set Top Boxes, Digital TVs, Printers
Embedded Systems
Active TERMINATION BUSes
DDR-I, DDR-II and DDR-III Memory Systems

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Part Name(s) : RT9173/ACM5 RT9173/ACS RT9173ACM5 RT9173ACS RT9173CM5 RT9173CS Richtek
Richtek Technology
Description : 1.5A/3A BUS TERMINATION REGULATOR

General Description
The RT9173/A REGULATOR is designed to convert voltage supplies ranging from 1.8V to 6V into a desired output voltage which adjusted by two external resistors, voltage divider. The REGULATOR is capable of sourcing or sinking up to 1.5A/3A of current while regulating an output voltage to within 2% or less.
The RT9173/A, used in conjunction with series TERMINATION resistors, provides an excellent voltage source for active TERMINATION schemes of high speed transmission lines as those seen in high speed memory BUSes and distributed backplane designs. The voltage output of the REGULATOR can be used as a TERMINATION voltage for DDR SDRAM.

Features
• Support Both DDR 1 (1.25VTT) and DDR 2 (0.9VTT) Requirements
• Power TO-263-5 and SOP-8 Packages
• Capable of Sourcing and Sinking Current 1.5A/3A
• Current-limiting Protection
• Thermal Protection
• Integrated Power MOSFETs
• Generates TERMINATION Voltages for SSTL-2
• High Accuracy Output Voltage at Full-load
• Adjustable VOUT by External Resistors
• Minimum External Components
• Shutdown for Standby or Suspend Mode Operation with High-impedance Output

Applications
• Computers
• Disk Drives
• CD-ROM
• Supply Splitter
• Graph Card

 

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Part Name(s) : LP2996 LP2996LQ LP2996LQX LP2996M LP2996MR LP2996MRX LP2996MX National-Semiconductor
National ->Texas Instruments
Description : DDR TERMINATION REGULATOR

General Description
The LP2996 linear REGULATOR is designed to meet the JEDEC SSTL-2 specifications for TERMINATION of DDR-SDRAM. The device contains a high-speed operational amplifier to provide excellent response to load transients. The output stage prevents shoot through while delivering 1.5A continuous current and transient peaks up to 3A in the application as required for DDR-SDRAM TERMINATION. The LP2996 also incorporates a VSENSE pin to provide superior load regulation and a VREF output as a reference for the chipset and DIMMs.

Features
Source and sink current
Low output voltage offset
No external resistors required
Linear topology
Suspend to Ram (STR) functionality
Low external component count
Thermal Shutdown
Available in SO-8, PSOP-8 or LLP-16 packages

Applications
DDR-I and DDR-II TERMINATION Voltage
SSTL-2 and SSTL-3 TERMINATION
HSTL TERMINATION

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Part Name(s) : FAN6555 FAN6555M FAN6555MX Fairchild
Fairchild Semiconductor
Description : 2A DDR BUS TERMINATION REGULATOR

Description
The FAN6555 switching REGULATOR is designed to convert voltage supplies ranging from 2.3V to 4V into a desired output voltage or TERMINATION voltage for DDR SDRAM memory. The FAN6555 can be implemented to produce regulated output voltages in two different modes. In the default mode, when the VREFpin is open, the FAN6555 output voltage is 50% of the voltage applied to VCCQ.

Features
• Can source and sink up to 2A continous, 3A peak
• No heatsink required
• Integrated Power MOSFETs
• Generates TERMINATION voltages for DDR SDRAM
• VREF input available for external voltage divider
• Separate voltages for VCCQand PVDD
• Buffered VREF output
• VOUT of ±3% or less at 2A
• Minimum external components
• 16-pin SOIC package
• -40°C to +85°C operating temperature range
• Shutdown for standby or suspend mode operation
• Thermal Shutdown ≈130ºC

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