SPX431L_04 Datasheet, PDF (1/12 Pages) Sipex Corporation – Precision Adjustable Shunt Regulator

®
SPX431L
Precision Adjustable Shunt Regulator
FEATURES
■ Tight Voltage Tolerance 0.5% at 10mA
■ Wide Operating Current 1mA to 100mA
■ Extended Temperature Range:
0°C to 105°C
■ Low Temperature Coefficient 30 ppm/°C
■ Improved Replacement in Performance for
TL431 and AS431
■ Low Cost Solution
ANODE
SPX431L
3 Pin SOT-23
1
REF
CATHODE
Now Available in Lead Free Packaging
APPLICATIONS
■ Battery Operating Equipment
■ Adjustable Supplies
■ Switching Power Supplies
■ Error Amplifiers
■ Single Supply Amplifier
■ Monitors / VCRs / TVs
■ Personal Computers
DESCRIPTION
The SPX431L is a 3-terminal adjustable shunt voltage regulator providing a highly accurate
bandgap reference. The SPX431L acts as an open-loop error amplifier with a 2.5V temperature
compensation reference. The SPX431L’s thermal stability, wide operating current (100mA) and
temperature range (0°C to 105°C) makes it suitable for a variety of applications that require a
low cost, high performance solution. SPX431L 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 20V with two external
resistors. The SPX431L is available in TO-92, SOIC-8, SOT-89, and SOT-23-3 packages.
BLOCK DIAGRAM
Cathode (K)
Reference
(R)
Date: 5/25/04
+
-
2.5V
Anode (A)
SPX431L Precision Adjustable Shunt Regulator
1
© Copyright 2004 Sipex Corporation5