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CM3202-00DE 参数 Datasheet PDF下载

CM3202-00DE图片预览
型号: CM3202-00DE
PDF下载: 下载PDF文件 查看货源
内容描述: DDR VDDQ和终止稳压器 [DDR VDDQ and Termination Voltage Regulator]
分类和应用: 总线通信稳压器驱动程序和接口接口集成电路双倍数据速率
文件页数/大小: 12 页 / 351 K
品牌: CALMIRCO [ CALIFORNIA MICRO DEVICES CORP ]
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PRELIMINARY
CM3202
DDR V
DDQ
and Termination Voltage Regulator
Features
Two linear regulators
-Maximum 2A current from V
DDQ
-Source and sink up to 2A V
TT
current
1.7V to 2.8V adjustable V
DDQ
output voltage
500mV typical V
DDQ
dropout voltage at 2A
V
TT
tracking at 50% of V
DDQ
Excellent load and line regulation, low noise
Fast transient response
Meet 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
Built-in over-current limit with short-circuit foldback and
thermal shutdown for V
DDQ
and V
TT
Fast transient response
5mA quiescent current
TDFN-8 and SOIC-8 packages for high performance
thermal dissipation and easy PC board layout
Optional RoHS Compliant Lead-free packaging
Product Description
T
he CM3202 is a dual-output low noise linear regulator
designed to meet SSTL-2 and SSTL-3 specifications
for DDR-SDRAM V
DDQ
supply and termination voltage
V
TT
supply. With integrated power MOSFET’s, the
CM3202 can source up to 2A of V
DDQ
current, and
source or sink up to 2A V
TT
current. The typical drop-
out voltage for V
DDQ
is 500 mV at 2A load current.
The CM3202 provides fast response to transient load
changes. Load regulation is excellent, less than 1%,
from no load to full load. It also has built-in over-current
limits and thermal shutdown at 170°C.
The CM3202 is packaged in an easy-to-use TDFN-8
and SOIC-8. Low thermal resistance (55°C/W) allows it
to withstand 1.55W
(1)
dissipation at 85°C ambient. It
can operate over the industrial ambient temperature
range of –40°C to 85°C.
Note
(1)
:
If TDFN-8 is mounted on a double-sided printed circuit board with
two square inches of copper area, it can to withstand 2W dissipation
at 85°C ambient then.
Applications
DDR memory and active termination buses
Desktop Computers, Servers
Residential and Enterprise Gateways
DSL Modems
Routers and Switchers
DVD recorders
3D AGP cards
LCD TV and STB
Typical Application
3.3V
220u
4.7u
220u
4.7u
VDDQ
VDDQ
1
2
3
4
4.7u
VIN
VIN
VTT
GND
VDDQ
VDDQ
8
7
887
6
5
S/D
VTT
845
C hip
S et
DL0
RT0
DLn
RTn
CM3202
ADJSD
GND
220u
DDR
REF
Memory
1.25V , 2.5A
1k
V
REF
1u
©
2006 California Micro Devices Corp. All rights reserved.
05/08/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
Fax: 408.263.7846
l
www.cmd.com
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