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TJ3212Q 参数 Datasheet PDF下载

TJ3212Q图片预览
型号: TJ3212Q
PDF下载: 下载PDF文件 查看货源
内容描述: DDR VDDQ和VTT终端电压稳压器 [DDR VDDQ and VTT Termination Voltage Regulator]
分类和应用: 稳压器双倍数据速率
文件页数/大小: 11 页 / 564 K
品牌: HTC [ HTC KOREA TAEJIN TECHNOLOGY CO. ]
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DDR VDDQ and VTT Termination Voltage Regulator
FEATURES
Two linear regulators
- Maximum 2A current from VDDQ
- Source and sink up to 2A VTT current
1.7V to 2.8V adjustable VDDQ output voltage
0.85V to 1.4V VTT output voltage (tracking at 50% of
VDDQ)
Buffered VREF output
500mV typical VDDQ dropout voltage at 2A
Excellent load and line regulation, low noise
Meets JEDEC DDR-I and DDR-II memory power spec
Linear regulator design requires no inductors and has
low external component count
Integrated power MOSFETs
Dual purpose ADJ/Shutdown pin
Enable VTT pin for sleep or suspend to RAM function
Built-in over-current limit and thermal shutdown for
VDDQ and VTT
Fast transient response
Low quiescent current
TDFN-8 PKG
TJ3212
SOP-8 PKG
SOP-16 PKG
ORDERING INFORMATION
APPLICATION
DDR memory and active termination buses
Desktop computers, servers
Residential and enterprise gateways
DSL modems
Routers and switches
DVD recorders, LCD TV and STB
3D AGP cards
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
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1
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HTC