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Personal Computers
Now Available in Lead Free Packaging
Refer to page 3 for pinouts.
DESCRIPTION
The SPX431 is a 3-terminal adjustable shunt voltage regulator providing a highly accurate
bandgap reference. The SPX431 acts as an open-loop error amplifier with a 2.5V temperature
compensation reference. The SPX431's thermal stability, wide operating current (150mA) and
temperature range (0擄C to 105擄C) makes it suitable for a variety of applications that require a low
cost, high performance solution. SPX431A tolerance of 0.5% is proven to be sufficient to
overcome all of the other errors in the system to virtually eliminate the need for trimming in the
power supply manufacturer's assembly line and contribute a significant cost savings.
The output voltage may be adjusted to any value between V
REF
and 36 volts with two external
resistors. The SPX431 is available in TO-92, SOIC-8, SOT-89, and SOT-23-5 packages.
TYPICAL APPLICATIONS CIRCUIT
Cathode (K)
Reference
(R)
+
-
2.5V
Anode (A)
Date: 1/19/05
SPX431A,B,C Precision Adjustable Shunt Regulator
漏 Copyright 2005 Sipex Corporation
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