SPX2431AM-L-TR Datasheet, PDF (1/9 Pages) Sipex Corporation – Precision Adjustable Shunt Regulator

®
SPX2431
Precision Adjustable Shunt Regulator
FEATURES
■ Trimmed Bandgap to 0.5% and 1.0%
■ Wide Operating Current 1mA to 100mA
■ Extended Temp. Range: 0°C to 105°C
■ Low Temperature Coefficient 30 ppm/°C
■ Offered in 3 Pin SOT-23 (M)
■ Replacement for TL431, AS2431
■ Low Noise Output
APPLICATIONS
■ Battery Operating Equipment
■ Adjustable Supplies
■ Switching Power Supplies
ANODE
3
SPX2431
3 Pin SOT-23
1
2
REF
Top View
CATHODE
Now Available in Lead Free Packaging
■ Error Amplifiers
■ Single Supply Amplifier
■ Monitors / VCRs / TVs
■ Personal Computers
DESCRIPTION
The SPX2431 is a 3-terminal adjustable shunt voltage regulator providing a highly accurate
bandgap reference. The SPX2431 acts as an open-loop error amplifier with a 2.5V temperature
compensation reference. The SPX2431’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. SPX2431A 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 20 volts with two external
resistors. In the standard shunt configuration, the combination of a low temperature coefficient,
sharp turn on characteristics, low output impedance, and programmable output voltage makes
this precision reference an excellent error amplifier. The SPX2431 is available in SOT-23-3
package.
FUNCTIONAL DIAGRAM
Cathode (K)
Reference
(R)
Date: 1/19/05
+
-
2.5V
Anode (A)
SPX2431 Precision Adjustable Shunt Regulator
1
© Copyright 2005 Sipex Corporation