TLV431BQDBVRQ1 Integrated Circuits (ICs)

Noise - 0.1Hz to 10Hz:	--
Base Part Number:	TLV431
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TA)
Current - Cathode:	100µA
Current - Supply:	--
Voltage - Input:	--
Noise - 10Hz to 10kHz:	--
Series:	Automotive, AEC-Q100
Temperature Coefficient:	--
Tolerance:	±0.5%
Current - Output:	15mA
Voltage - Output (Max):	6V
Voltage - Output (Min/Fixed):	1.24V
Output Type:	Adjustable
Reference Type:	Shunt
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The TLV431BQDBVRQ1 is part of a voltage reference family developed by Texas Instruments. It is a Programmable Voltage Reference offered in various package options. This study covers the TLV431BQDBVRQ1 application fields and the working principle behind it. The TLV431BQDBVRQ1 is part of the Power Management IC (PMIC) family and more specifically a Voltage Reference.

Application Field

The TLV431BQDBVRQ1 has an attractive number of uses in a variety of applications. It is mainly employed in measurement, control and display circuits, as it can provide accurate output references as low as 100 mV. More applications include:

• Waveform display circuits
• Battery monitoring
• Industrial process control and automation
• Automotive displays, dials, and gauges
• Power supplies
• Computer, mobile, and consumer electronics

The variety of operations and applications demonstrated by the TLV431BQDBVRQ1 make it an incredibly versatile reference voltage source for a variety of fields.

Features and Benefits

The TLV431BQDBVRQ1 series of Programmable Voltage References offers a variety of features and benefits which contribute to their broad PC customer base. They have very low temperature coefficients and zero hysteresis for improved accuracy at all operating temperatures. The voltage of the reference can be adjusted as well, thus allowing the user to set the output precision with a minimum amount of external components. Additionally, the device is designed to require minimum biasing current, thus minimizing power consumption. Furthermore its flexible voltage range, from 0.10V to 10.0V, allows the user to set the needed voltage reference up more easily. The device also features protection against short-circuit protection by shutting off the output transistor whenever a short-circuit is detected. Another benefit is level shifting to allow the program voltage to be referenced to insulated grounds that won’t be destroyed by the I/O.

Package Options

The TLV431IN is available in five packages: SOIC_8 (on tape and reel), QSOP_16, TSSOP_16, DDPAK (on tape and reel) and also SOIC_8-L (3 V version on tape and reel).

Working Principle

The TLV431BQDBVRQ1 is a shunt-mode programmable voltage reference. In this type of regulator topology, the reference voltage is derived from the negative side of an output transformer winding that is connected between the output and ground. The output winding is driven by an adjustable current source. The current source drives the output branch directly, controlling an internal reference voltage. The output voltage is created from the output branch voltage and the adjustable current source voltage. To make the device adjustable, a digitally controlled system is connected between the output branch and the reference voltage. This system also has the function of an external reference voltage gain amplifier. The reference voltage is then added to the output branch voltage or subtracted from it in order to adjust the output voltage. The TLV431BQDBVRQ1 features protection against short-circuit. This protection is achieved by monitoring the current in the output branch. If the current exceeds the set limit, the device shuts off the output transistor and interrupts the current flow.

Conclusion

The TLV431BQDBVRQ1 is a Programmable Voltage Reference part of the PMIC family with a variety of features and abilities. Its applications range from waveform display circuits and battery monitoring all the way to consumer electronics and computer applications. Its working principle is that of a shunt-mode programmable voltage reference, where the output branch voltage, the adjustable current source voltage and the adjustable reference voltage form the output voltage. The device also features protection against short-circuit and low power consumption, making it a reliable and versatile reference voltage source.

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