SP2996B Datasheet, PDF (1/10 Pages) Sipex Corporation – 2A Bus Termination Regulator

®
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SP2996B
2A Bus Termination Regulator
FEATURES
■ Capable of sourcing and sinking 2A
Continuous current
■ Supports both DDR1 (1.25V_TT) and
■ LDoDwRO2u(0tp.9uVt V^TTo) lrtaegqeuirOefmfseent,ts⁺ 20mV
■ Thermal and Current Limit Protection
■ Integrated Power MOSFETs
■ Generates Termination for SSTL-2
■ High Accuracy Output at Full Load
■ Adjustable V by External Resistors
■
OUT
Minimal External Components
■ Available in 8 pin NSOIC package
VIN 1
GND 2
REFEN 3
VOUT 4
SP2996B
8 Pin nSOIC
8 VCNTL
7 VCNTL
6 VCNTL
5 VCNTL
Now Available in Lead Free Packaging
APPLICATIONS
■ DDR Memory Termination
■ Active Bus Termination
■ Supply Splitter
DESCRIPTION
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.
TYPICAL APPLICATIONS CIRCUIT
V_CNTL= 3.3V
V_IN= 2.5V
CES7002A
EN
R1
100kΩ
R2
100kΩ
1
5,6,7,8
V_IN
V_CNTL
®
3
VREF
V_OUT ⁴
C₁
100pF
SP2996B
GND
2
C_IN
470µF
C_CNTL
47µF
V_OUT
C_OUT
220µF
Date: 07/7/05
SP2996B 2A Termination Regulator
1
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