TPS70933DBVT

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The TPS70933DBVT is a linear voltage regulator developed by Texas Instruments (TI) and is a member of the 709 series of positive linear regulators. The regulator is specifically designed to accurately deliver up to 1.5 amps of output current over an adjustable output range of 1.2V to 28V. TPS70933DBVT is ideal for applications such as powering a microcontroller, FPGAs, and other voltage-sensitive systems. This article will discuss the application field and working principle of the TPS70933DBVT linear voltage regulator.

Applications

The TPS70933DBVT is designed for use in various applications such as automotive, portable electronics, industrial, medical, and consumer electronics. The device is well suited for withstanding automotive environment temperatures ranging from -40°C to 150°C. Additionally, the regulator features a low quiescent current of 17.1µA and a wide operating temperature range from -40°C to 125°C, suitable for cost-sensitive battery-powered applications.

TPS70933DBVT is also used in industrial and medical applications as it offers excellent thermal performance, as well as fast transient response with current-limiting protection. Additionally, the device also features an integrated foldback circuit (bandgap reference) and a short-circuit robustness to ensure high efficiency and low power dissipation during typical operation. Moreover, the device is integrated with an Active Discharge Mode that discharges the output capacitor to a safe voltage level when power is removed.

TPS70933DBVT is well suited for use in portable applications such as notebook computers, tablets, PDAs, and other battery-powered systems due to its low quiescent current, high efficiency, and wide output voltage range. Furthermore, the device features a fast transient response and is designed to deliver up to 1.5A peak output current, allowing designers to implement a high-efficiency power source in a small number of power cycles.

Working Principle

The TPS70933DBVT is a linear voltage regulator that utilizes an adjustable output voltage of up to 28V. The device utilizes an advanced linear regulator control technique which employs two main feedback loops—a voltage error amplifier and a current sense amplifier—to ensure optimal stability and accuracy. The voltage error amplifier monitors the output voltage and regulates the output current to maintain the output within a specific range. This feedback loop is used to regulate the output voltage and current.

The second feedback loop, the current sense amplifier, monitors the current flow across the output transistor and is used to adjust the gate drive to the output transistor. This action will ensure that the output current is maintained within acceptable limits. Additionally, the current sense amplifier monitors the transient response of the output current to ensure the output never exceeds the over-current limit display. As a result, the system can respond quickly to retain the maximum current within the regulation range.

The TPS70933DBVT also features an adjustable internal temperature limit to protect the device from thermal stress and further improve current/voltage tracking. This is accomplished by controlling the current output when the temperature reaches a predetermined limit. Additionally, the device also features an Active Discharge Mode which is used to discharges the output capacitor to a safe voltage level, eliminating the possibility of in-rush current and eventual damage to the system. Furthermore, the device is integrated with an EMI Filter operation (IFR) which reduces electromagnetic interference.

Conclusion

In conclusion, the TPS70933DBVT is an integrated, adjustable voltage regulator that is specifically designed to accurately deliver up to 1.5A of output current over an adjustable output range of 1.2V to 28V. This device is most suitable for automotive, portable, medical, industrial and consumer electronics applications due to its low quiescent current, fast transient response, high efficiency, and wide operating temperature range. Additionally, the device is integrated with an Active Discharge Mode and an EMI filter operation (IFR) to ensure optimal stability, accuracy and protection during typical operation.

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