CM3106
2 Amp Source/ Sink Bus Termination Regulator
Features
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Ideal for DDR-I and DDR-II V
TT
applications
Sinks and sources 2.0A for DDR-I
Over current protection
Over temperature protection
Integrated power MOSFETs
Excellent accuracy (0.5% load regulation)
Pin and functionally compatible with LP2995
8-lead SOIC and PSOP packages
Lead-free versions available
Product Description
The CM3106 is a sinking and sourcing regulator specif-
ically designed for providing power to DDR memory
terminating resistors and companion chip set V
TT
power. The output voltage accurately tracks V
DDQ
/2.
The CM3106 can source and sink current up to 2A,
ideal for DDR-I memory systems, and 1.2A for DDR-II
systems, while maintaining a load regulation of 0.5% in
either application.
The CM3106 provides over current and over tempera-
ture protection which protects the device from exces-
sive heating due to high current and high temperature.
A shutdown capability using an external transistor
reduces power consumption and provides a high
impedance output.
The CM3106 is housed in both 8-lead SOIC and PSOP
packages and is available with optional lead-free finish-
ing.
Applications
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Single and Dual Channel DDR Memory
Bus Termination
Active Termination Buses
Graphics Card Memory Termination
Simplified Electrical Schematic
AV
IN
V
DDQ
PV
IN
Over Temp
Over Current
Reference
50K
Driver
V
REF
OUT
IN
V
TT
50K
Buffer
V
SENSE
GND
© 2004 California Micro Devices Corp. All rights reserved.
02/02/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
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Tel: 408.263.3214
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Fax: 408.263.7846
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www.calmicro.com
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