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Date: 07/7/05

SP2996B 2A Termination Regulator

© Copyright 2005 Sipex Corporation

2A Bus Termination Regulator

Advanced

SP2996B

FEATURES

■ Capable of sourcing and sinking 2A

Continuous current

■ Supports both DDR1 (1.25V

DDR2 (0.9V

■ Thermal and Current Limit Protection

■ Integrated Power MOSFETs

■ Generates Termination for SSTL-2

■ High Accuracy Output at Full Load

■ Adjustable V

■ Minimal External Components

■ Available in 8 pin NSOIC package

®

The SP2996B voltage regulator is designed to convert voltage supplies ranging from 1.6V to

6V into a desired output voltage which is adjusted by an external resistor divider. The regulator

is capable of sourcing or sinking up to 2A of Continuous current while regulating an output

voltage to within 20mV. The SP2996B provides an excellent voltage source for active

termination schemes of high speed transmission lines such as those seen in high speed

memory buses and distributed backplane designs when used in conjunction with series

termination resistors. The voltage output of the regulator can be used as a termination voltage

for DDR SDRAM, and it meets the JEDEC SSTL-2 and SSTL-3 specifications . Current limits

in both sourcing and sinking mode, plus on-chip thermal shutdown make the circuit tolerant

of output fault conditions.

APPLICATIONS

■ DDR Memory Termination

■ Active Bus Termination

■ Supply Splitter

DESCRIPTION

Now Available in Lead Free Packaging

TYPICAL APPLICATIONS CIRCUIT

SP2996B

®

R1

R2

GND

EN

CES7002A

100kΩ

4

100pF

470µF

47µF

220µF

3

1

2

5,6,7,8

100kΩ

1

2

3

4

5

6

7

8

SP2996B

8 Pin nSOIC

VIN

GND

REFEN

VOUT

VCNTL

VCNTL

VCNTL

VCNTL