TLV431IDBVTG4

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The TLV431IDBVTG4 is an adjustable voltage reference IC that belongs to a class of power management integrated circuits known as voltage references. Voltage references provide a stable and accurate source of reference voltage, which is held constant regardless of fluctuations in the input power supply voltage. The TLV431IDBVTG4 is suitable for reference voltage circuit designs which require a low dropout voltage, tight output voltage tolerances, and a wide operating temperature range.

The TLV431IDBVTG4 is a three-terminal adjustable shunt regulator. It provides a reference voltage output over a wide operating range of 3.2 V to 100 V from a single supply. The device features a low minimum dropout voltage of 120 mV, an adjustable output voltage between 1.25 V to 36 V, and an output voltage tolerance of ±1.0%. It also features a low temperature coefficient of 0.02%/°C which ensures an extremely stable reference voltage output even under temperature changes. The device is available in an eight-pin, surface-mount SOIC package, suitable for automated assembly.

This device can be used in a wide range of applications, such as powering microprocessors and digital logic circuits, supplying reference voltages in test and measurement systems, and providing regulated voltages in battery-powered devices. It is also used in analog-to-digital converters and as a precision voltage reference in switch-mode power supplies and AC-DC converters.

The TLV431IDBVTG4 consists of an active Zener diode which is laser trimmed for absolute accuracy and a trimmed resistor string. An external resistor is used to control the output voltage, so that it remains proportional to the voltage across the resistor. The output voltage is internally regulated and is maintained at a constant value independent of temperature, line and load variations.

The TLV431IDBVTG4 operates by sensing the differential voltage between the reference terminal (R) and the output terminal (VOUT). This signal is then applied to the GATE, which senses the output voltage. When the output voltage drops due to an increase in load or line voltage, the GATE signal increases and the output voltage is regulated by the control voltage applied to the CONTROL input. The CONTROL signal also adjusts the reference voltage, allowing the output voltage to be varied in software.

The TLV431IDBVTG4 is an ideal solution for applications which require a precise and stable reference voltage. Its low dropout voltage, wide operating range and excellent accuracy make it suitable for a wide range of power management and voltage reference applications.

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