TS4431 - 1.224V Open Collector Shunt Voltage Reference
STMicroelectronics
General Description
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.
Key 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. SOT23-5L (Plastic Micropackage)
Pin connections (top view)
1 Vc c
Sink 5
2 Gnd
3 Nc
Ref 4.
Full PDF Text Transcription for TS4431 (Reference)
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TS4431. For precise diagrams, and layout, please refer to the original PDF.
TS4431 1.224V Open Collector Shunt Voltage Reference ■ Internal 1.224V ±0.5% precision ■ Low output saturation voltage 75 mV max between SINK and GND ■ Low current consum...
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saturation voltage 75 mV max between SINK and GND ■ Low current consumption: 250µA ■ Industrial temperature range: -40 to +85°C ■ 100ppm/°C temperature coefficient Description 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 a
TS4431 Datasheet
