TLV431BQLPR

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The TLV431BQLPR is a shunt voltage reference, specifically designed to provide a voltage reference point in precision analog and digital systems. It is a 3-terminal adjustable bandgap shunt regulator specifically designed to provide an output voltage that is accurately adjustable over the range of 1.3V to 5.5V with a line regulation of 0.005V/V. This makes it ideally suited for applications such as audio amplifiers, power supplies, and digital-to-analog and analog-to-digital converters.

The TLV431BQLPR is an adjustable bandgap shunt voltage reference that operates within a wide range of input and output voltages, from 1.3V to 5.5V. The unit is internally compensated for temperature, meaning that the output voltage can be accurately adjusted to the desired voltage setpoint within this range, with a line regulation of 0.005V/V. The unit also has a very low temperature coefficient of 0.2mV/°C, which ensures that output voltage does not drift significantly with temperature. Additionally, the unit features excellent PSRR (power supply rejection ratio), with an input impedance of several GΩ, ensuring that the output voltage is maintained despite variations in power supply voltage.

The TLV431BQLPR utilizes a bandgap reference architecture designed to provide a reference voltage that is both accurate and stable over a wide range of operating conditions. The unit consists of two bipolar transistors at the input, connected in reverse-parallel in a cascode configuration with a diode-connected transistor operating at base current. This arrangement provides temperature stability by compensating for changes in the base-emitter voltage. At the output, a bipolar transistor is connected in a common-emitter arrangement, providing local feedback so that the output voltage will remain accurate despite variations in current.

The TLV431BQLPR is an ideal choice for applications that require an adjustable voltage reference with very low temperature coefficient and excellent line regulation. The unit is well suited for audio amplifiers, power supplies, and digital-to-analog and analog-to-digital converters. It can also be used in precision measurement and control systems, such as medical instruments, as well as in automotive and industrial applications requiring accurate reference voltages. The TLV431BQLPR is available in an inexpensive Single-In-Line (SIP) package, making it easy to integrate into existing designs.

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