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PDF CM3202 Data sheet ( Hoja de datos )
| Número de pieza | CM3202 | |
| Descripción | DDR VDDQ and Termination Voltage Regulator | |
| Fabricantes | California Micro Devices | |
| Logotipo |  |
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PRELIMINARY
CM3202
Features
DDR VDDQ and Termination Voltage Regulator
Product Description
• 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
• 500mV typical VDDQ dropout voltage at 2A
• VTT tracking at 50% of VDDQ
• 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 VDDQ and VTT
• 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
The CM3202 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 MOSFET’s, the
CM3202 can source up to 2A of VDDQ current, and
source or sink up to 2A VTT current. The typical drop-
out voltage for VDDQ 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.
Applications
Note(1) :
• 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
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.
Typical Application
3.3V
220u
220u 4.7u
1
VIN
8
VDDQ
2
VIN
7
VDDQ
CM3202
36
VTT ADJSD
4
4.7u GND
5
GND
220u 4.7u C hip
S et
887
845
S/D
VDDQ
VTT 1.25V , 2.5A
1k
DL0
RT0
DLn
RTn
VREF
VDDQ
DDR
REF Memory
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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Typical Operating Characteristics
VDDQ Transient Response
PRELIMINARY
CM3202
(cont’d)
VTT Transient Response
IOUT
VDDQ
IOUT
VTT
VIN = 3.3V
IOUT Step: 15mA ~ 1.5A
VIN = 3.3V
IOUT Step: -750mA ~ +750mA
With TDFN-8 Package
VDDQ Transient Response
VTT Transient Response
IOUT
VDDQ
IOUT
VTT
VIN = 3.3V
IOUT Step: 15mA ~ 700mA
VIN = 3.3V
IOUT Step: -350mA ~ +350mA
With SOIC-8 Package
© 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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Mechanical Details
TDFN-08 Mechanical Specifications
The CM3202-00DE is supplied in an 8-lead, 0.65mm
pitch TDFN package. Dimensions are presented below.
PACKAGE DIMENSIONS
Package
JEDEC
No.
Leads
Dim.
A
A1
A2
A3
b
D
D2
E
E2
e
K
L
# per
tape and
reel
TDFN
MO-229 (Var. WEEC-1)=
6
Millimeters
Inches
Min Nom Max Min Nom Max
0.70 0.75 0.80 0.028 0.030 0.031
0.00 0.02 0.05 0.000 0.001 0.002
0.45 0.55 0.65 0.018 0.022 0.026
0.20 0.008
0.25 0.30 0.35 0.010 0.012 0.014
3.00 0.118
1.90 2.00 2.10 0.075 0.079 0.083
3.00 0.118
1.60 1.70 1.80 0.063 0.067 0.071
0.65 0.026
0.20 0.008
0.20 0.30 0.45 0.008 0.012 0.018
3000 pieces
Controlling dimension: millimeters
=This package is compliant with JEDEC standard MO-229, variation
VEEC-1 with exception of the "D2", "E2" and "b" dimensions as
called out in the table above.
PRELIMINARY
CM3202
Mechanical Package Diagrams
D
8765
Pin 1
Marking
1 23 4
TOP VIEW
0.10 C
0.08 C
A1
SIDE VIEW
A A3 A2
5678
D2
GNDCP0.A25D
L
K 4321
e
BOTTOM VIEW
b
8X
0.10 M C A B
Package Dimensions for 8-Lead TDFN
© 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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| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet CM3202.PDF ] | |
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