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TS4431AILT

TS4431AILT

TS4431ILT

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1.224V Open Collector Shunt Voltage Reference

Quantity $ per Unit Savings
1 - 9$1.110%
10 - 24$1.0010%
25 - 99$0.9515%
100$0.7830%
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In stock
$1.11
Parameter NameParameter Value
Operating Temp Min Celsius-40.0
Operating Temp Max Celsius85.0
ECCN USEAR99
ECCN EUNEC
Packing TypeTape And Reel
RoHs compliantEcopack2
GradeIndustrial
Package NameSOT23-5L

The TS4431 is a four-terminal device dedicated to low voltage Switch Mode Power Supplies (SMPS).


It integrates a 1.224V voltage reference, an amplifier, and an open collector output transistor in a single package. The TS4431’s operating mode is similar to the well-known standard voltage reference, the TL431. It maintains the desired feedback voltage at the REF pin in a closed loop configuration by sinking a current proportional to the error voltage at the REF pin.


TS4431 features an open collector transistor with an ultra-low saturation voltage, allowing it to be used in series with the optocoupler in an SMPS architecture to regulate low voltage SMPS.

Key features
  • Internal 1.224V ±0.5% precision
  • Low current consumption: 250 µA
  • Low output saturation voltage 75 mV max between SINK and GND
  • 100ppm/˚C temperature coefficient
  • Industrial temperature range: -40 to +85˚C