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TS4431 Datasheet(PDF) 1 Page - STMicroelectronics |
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TS4431 Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 8 page Rev 2 8 November 2005 1/8 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 consumption: 250 µA ■ 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 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. Applications ■ Low voltage switch mode power supplies ■ Isolated DC/DC converter ■ Computers ■ Low voltage discrete regulator Order Codes SOT23-5L (Plastic Micropackage) Pin connections (top view) 1 2 34 5 Vc c Gnd Nc Ref Sink Part Number Accuracy Temperature Range Package Packing Marking TS4431AILT 0.5% -40, +85°C SOT23-5 Tape & Reel L288 TS4431ILT 1% L275 www.st.com |
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