TPS72118MDBVREP

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TPS72118MDBVREP – Application Field and Working Principle

The TPS72118MDBVREP is an integrated voltage regulator with advanced features designed to deliver superior performance in power management applications. It is part of Texas Instruments\' line of PMIC - Voltage Regulators-Linear and is an excellent choice for designers looking for a low-cost solution to efficiently regulate voltage for a wide range of industrial and consumer products. The device includes a wide range of features and provides superior efficiency, robust design and easy scalability.

Device Overview

The TPS72118MDBVREP is a fully integrated device that can operate as a stand-alone voltage-regulator or can be used in conjunction with an external power supply to provide a universal power regulator. The internal power-stage of the device enables the low EMI-protected converter to operate at up to 5A current output, making it an ideal choice for wireless, consumer and automotive applications. The device includes the usual features such as line regulation, load regulation, fault protection and input/output ripple reduction. It also features short-circuit protection, over-voltage protection and current limit. The wide input voltage range (1.2V to 20V) and programmable switching frequency make it suitable for multilevel applications.

Features and Benefits

• High efficiency for low power dissipation
• Full digital control loops for maximum noise immunity
• Wide input voltage range (1.2V to 20V)
• Programmable switching frequency up to 2MHz
• Integrated filter and soft start
• Available with an integrated power switch or controller mode
• Over-temperature and thermal protection
• Short-circuit protection
• Over-voltage protection with programmable trip and timeout
• Current limit with programmable trip level

Applications

The TPS72118MDBVREP is an excellent choice for a variety of applications including automotive systems, consumer electronics, industrial applications, hand-held devices, portable & wearable devices and solar energy systems. It is ideal for operating voltage sensitive devices and controlling switching motors and in telecom, computing, instrumentation and audio test equipment. Thanks to its low output noise and fast transient response, the device can also be used in critical communication and timing applications, such as radio and GPS receivers.

Working Principle

The TPS72118MDBVREP is based on a closed-loop feedback control system that regulates the output voltage according to a given input voltage, while maintaining the required current output. The integrated control loop comprises of the following blocks: an input voltage sensing circuit, a comparator, an internal oscillator, a PWM generator, and a error amplifier. The input voltage sensing circuit samples the input voltage and then passes it through the comparator. The comparator checks the input voltage against the reference voltage and then generates an error signal. This error signal is fed to the internal oscillator and pulse-width modulation generator, that generate a control signal by modulating the switching frequency and duty cycle.

The control signal is then sent to the error amplifier, which amplifies the signal and sends it to the power stage. The power stage is responsible for controlling the output voltage and current by driving the switching elements of the device. As the output voltage or current changes due to load conditions, the control loop constantly monitors it and adjusts the switching frequency, duty cycle and hence the output voltage and current in order to maintain the desired level.

Conclusion

The TPS72118MDBVREP is a powerful, integrated linear voltage regulator with low quiescent current, high efficiency, low output impedance and advanced features to improve performance in power management applications. It can be used in a wide range of applications, from automotive and consumer electronics to computing and energy management systems, and offers superior performance and exceptional value for money.