TLV431ACLPE3

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The TLV431ACLPE3 is a low-power, programmable shunt regulator which belongs to a family of precision voltage references. It has a bandgap reference voltage, internal current regulation, and an externally adjustable reference output voltage following an S-shaped curve. It is commonly used in battery-powered applications, low-voltage systems, and precision current measurement applications.

Application field

As a voltage reference, TLV431ACLPE3 can stabilize the power supply register output to prevent variation of the register output voltage. Moreover, the TLV431ACLPE3 is also often used to limit and monitor power dissipation, as well as in metering and instrumentation applications such as potentiometers, controllers, and precision current measurements. Finally, it is commonly found in voltage regulation, DCDC converters, power management ICs, and temperature measurement systems.

Working Principle

The TLV431ACLPE3 uses an on-chip bandgap voltage reference to provide a stable reference voltage. The reference output voltage is then adjusted with an external resistor, allowing the user to program the output reference voltage. The TLV431ACLPE3 has a wide operating temperature range and draws minimal power by using the current-switch topology.

Once the output voltage is set, the current-switch regulates a current mirror circuit, thus limiting the maximum current for increased accuracy. The output voltage follows an S-shaped curve, with a drop of 0.1% for a change in input current of 0.1%. This allows for efficient power management and improved noise immunity.

In summary, TLV431ACLPE3 is a highly accurate voltage reference with a wide operating temperature range. It is used in applications ranging from precision current measurement to battery-powered devices. By using the current-switch topology, it can reduce power consumption and provide improved noise immunity.

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