TJ3212 Datasheet, PDF (1/11 Pages) HTC Korea TAEJIN Technology Co. – DDR VDDQ and VTT Termination Voltage Regulator

DDR VDDQ and VTT Termination Voltage Regulator
TJ3212
FEATURES
z Two linear regulators
- Maximum 2A current from VDDQ
- Source and sink up to 2A VTT current
z 1.7V to 2.8V adjustable VDDQ output voltage
z 0.85V to 1.4V VTT output voltage (tracking at 50% of
VDDQ)
z Buffered VREF output
z 500mV typical VDDQ dropout voltage at 2A
z Excellent load and line regulation, low noise
z Meets JEDEC DDR-I and DDR-II memory power spec
z Linear regulator design requires no inductors and has
low external component count
z Integrated power MOSFETs
z Dual purpose ADJ/Shutdown pin
z Enable VTT pin for sleep or suspend to RAM function
z Built-in over-current limit and thermal shutdown for
VDDQ and VTT
z Fast transient response
z Low quiescent current
APPLICATION
z DDR memory and active termination buses
z Desktop computers, servers
z Residential and enterprise gateways
z DSL modems
z Routers and switches
z DVD recorders, LCD TV and STB
z 3D AGP cards
TDFN-8 PKG
SOP-8 PKG
SOP-16 PKG
ORDERING INFORMATION
Device
TJ3212Q
TJ3212DP
TJ3212D
Package
TDFN-8
SOP-8
SOP-16
DESCRIPSION
The TJ3212 is a dual-output low noise linear regulator designed to meet SSTL-2 and SSTL-3 specifications for
DDR-SDRAM VDDQ supply and termination voltage VTT supply. With integrated power MOSFETs the TJ3212
can source up to 2A of VDDQ continuous current, and source or sink up to 2A VTT continuous current. The
typical dropout voltage for VDDQ is 500mV at 2A load current.
The TJ3212 provides excellent full load regulation and fast response to transient load changes. It also has built-
in over-current limits and thermal shutdown at 170°C.
The TJ3212 supports Suspend-To-RAM (STR) and ACPI compliance with Shutdown Mode which tri-states VTT
to minimize quiescent system current.
The TJ3212 is available in a space saving TDFN-8 and SOIC-8 surface mount packages. Low thermal
resistance allows them to withstand high power dissipation at 85°C ambient. The TJ3212 can operate over the
industrial ambient temperature range of –40°C to 85°C.
Mar. 2011 - Preliminary
-1 -
HTC