EUP7996 Datasheet, PDF (1/10 Pages) Eutech Microelectronics Inc – 1.5A DDR Termination Regulator

EUP7996
1.5A DDR Termination Regulator
DESCRIPTION
The EUP7996 is a high performance linear regulator
designed to provide power for termination of a DDR
memory bus. It significantly reduces parts count, board
space and overall system cost over previous switching
solutions.
The EUP7996 contains a high-speed operational amplifier
to provide excellent response to load transients. The
EUP7996 also incorporates a V_SENSE pin to provide
superior load regulation and a V_REF output as a reference
for chipset and DIMMs.
An additional feature found on the EUP7996 is an active
low shutdown (SD) pin. When SD is pulled low the V_TT
output will Tri-state providing a high impedance output,
but, V_REF will remain active. A power savings advantage
can be obtained in this mode through lower quiescent
current.
The EUP7996, 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. A typical
DDR memory system is seen in Figure 1.
FEATURES
z Extremely low quiescent current (305uA)
z Fast transient response time
z Capable of sourcing and sinking 1.5A for DDR-I
termination
z Reference out for other memory and control
components
z Low-current shutdown mode
z Over-temperature protection
z High accuracy output voltage at full-load
z Low external component count
z Available in SOP-8, SOP(FD) package
z RoHS compliant and 100% lead (Pb)-free
APPLICATIONS
z DDR-I and DDR-II termination voltage
SIMPLIFIED SYSTEM DIRGRAM
DS7996 Ver2.5 June.2005
Figure 1.
1