TL431 Regulator Programmable Shunt Regulator

TL431 is a three pin transistor like adjustable or programmable voltage regulator. TL431 is called a programmable shunt regulator, in simple terms it may be understood as an adjustable zener diode.

These devices exhibit a wide operating current range of 1.0 mA to 100 mA with a typical dynamic impedance of 0.22 .

TL431A is a three-terminal adjustable precision shunt voltage regulator integrated circuit. With the use of an external voltage divider, a TL431 can regulate voltages ranging from 2.5 to 36 V, at currents up 100 mA.

The 2.5 V reference makes it convenient to obtain a stable reference from 5.0 V logic supplies, and since the TL431A operates as a shunt regulator, it can be used as either a positive or negative voltage reference.

TL431 Transistor is three−terminal programmable shunt regulator diodes. These monolithic IC voltage references operate as a low temperature coefficient zener which is programmable from Vref to 36 V with two external resistors.

The characteristics of these references make them excellent replacements for zener diodes in many applications such as digital voltmeters, power supplies, and op amp circuitry.

TL431 Regulator is adjustable shunt voltage references with guaranteed temperature stability over the entire operating temperature range.

The device temperature range is extended for the automotive version from -40 °C up to +125 °C. The output voltage can be set to any value between 2.5 and 36 V with two external resistors.

TL431 operate with a wide current range from 1 to 100 mA with a typical dynamic impedance of 0.22 Ω.

Features : –

• Low Output Noise Voltage
• Temperature Compensated for Operation over Full Rated Operating Temperature Range
• Low Dynamic Output Impedance
• Can use as either positive or negative voltage reference

TL431 Regulator Specifications : –

• Programmable Output Voltage to 36 Volts
• Low Dynamic Output Impedance 0.2Ω Typical
• Sink Current Capability of 1.0 to 100mA
• Equivalent Full-Range Temperature Coefficient of 50ppm/°C Typical
• Temperature Compensated For Operation Over Full Rated Operating Temperature Range
• Low Output Noise Voltage
• Fast Turn-on Response

TL431 Regulator Applications : –

• Switch mode Power supplies
• Isolated Power supply circuits
• Voltage comparators
• Current Regulation circuits
• Opto-Coupler Linearisers
• Shunt Regulators
• Improved Zener
• Variable Reference

Package : –

1 x TL431 Regulator Programmable Shunt Regulator

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