UR5596(2005) 데이터 시트보기 (PDF) - Unisonic Technologies
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UR5596 Datasheet PDF : 11 Pages
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UNISONIC TECHNOLOGIES CO.,LTD
UR5596
DDR TERMINATION
REGULATOR
MOS IC
DESCRIPTION
The UTC UR5596 is a linear bus termination regulator and
designed to meet JEDEC SSTL-2(Stub-Series Terminated
Logic) specifications for termination of DDR-SDRAM. It also can
be used in SSTL-3 or HSTL(High-Speed Transceiver Logic)
scheme. The device contains a high-speed OP AMP to provide
excellent response to the load transients, and can deliver 1.5A
continuous current and transient peaks up to 3A in the
application as required for DDR-SDRAM termination.
The UTC UR5596 also incorporates a VSENSE pin to provide
superior load regulation and a VREF output as a reference for the
chipset and DIMMs. Besides, an active low shutdown (SHDN)
pin provides Suspend To RAM (STR) functionality. When SHDN
is pulled low the VTT output will tri-state providing a high
impedance output, but, VREF will remain active. A power savings
advantage can be obtained in this mode through lower
quiescent current.
Regarding the output, VTT is capable of sinking and sourcing
current while regulating the output voltage equal to VDDQ/2. The
output stage has been designed to maintain excellent load
regulation while preventing shoot through. The UTC UR5596
also incorporates two distinct power rails that separates the
analog circuitry from the power output stage. This allows a split
rail approach to be utilized to decrease internal power
dissipation and permits UTC UR5596 to provide a termination
solution for DDRII SDRAM.
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 protection
SOP-8
*Pb-free plating product number: UR5596L
ORDERING INFORMATION
Ordering Number
Normal
Lead Free Plating
UR5596-S08-R UR5596L-S08-R
UR5596-S08-T UR5596L-S08-T
Package
SOP-8
SOP-8
Packing
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2005 Unisonic Technologies Co.,LTD
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QW-R502-045,A
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