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TPS73118DBVR application field and working principle

The TPS73118DBVR is a low-power, low-dropout (LDO) linear voltage regulator. It is a small, monolithic, family of fixed and adjustable voltage regulators whose low power consumption and low dropout voltage make them ideal for a wide variety of applications. This allows designers to use the TPS73118DBVR in a wide range of applications where the power consumption must be kept to a minimum, without sacrificing performance.The TPS73118DBVR is designed to realize efficient and reliable power management for low-voltage, portable system designs. The output voltage is factory set at 1.8V, although it can be adjusted from 2.5V to 3.3V. This regulator is specifically designed to provide the regulated, low-noise power required to drive digital logic and other logic devices, while eliminating discrete, low-dropout voltage regulators that require additional external components and board space. To meet the requirements of these applications, the TPS73118DBVR can provide up to 100mA of output current.

Applications

The TPS73118DBVR is designed to provide a simple and efficient method of regulating power supply for a variety of low-voltage, low power system designs such as: automotive, battery-powered systems, DC/DC converters, telecommunications and consumer electronic applications. The TPS73118DBVR is also an ideal solution for automotive systems and many other low-power applications since it can regulate 1.8V to 3.3V outputs with low quiescent current (less than 1uA) and high efficiency.The wide and adjustable output voltage range of 2.5V to 3.3V in the TPS73118DBVR makes it a suitable device for Digital Logic, peripheral and interface ICs, such as USB, MP3 players, digital cameras, and other low-power consumer electronics.

Working Principle

The TPS73118DBVR is a linear voltage regulator, meaning that it uses the same basic architecture as a simple diode-based voltage regulator, but with the addition of active circuitry that reduces heat dissipation. The TPS73118DBVR uses an internal PNP transistor to control the output voltage from the input voltage. The regulator also utilizes a voltage reference as the control element.The incoming input voltage is regulated by the voltage reference to the desired output voltage. The incoming voltage passes through a feedback loop, which consists of a resistor divider network, a comparator, and a driver circuit. The comparator continuously monitors the actual output voltage and sends a voltage reflection back to the driver circuit. The driver circuit then applies the appropriate level of current to the PNP transistor to control the current draw and output voltage.The TPS73118DBVR is designed to deliver good transient response, wide input to output voltage range and low power dissipation. It also includes other features such as over-temperature and overload protection.

Conclusion

The TPS73118DBVR is a low-power, low-dropout (LDO) linear voltage regulator with a wide operating voltage range of 2.5V to 3.3V. It is well-suited for low-voltage applications and power system designs, such as automotive, battery-powered systems, DC/DC converters, telecommunications, and consumer electronic applications. The TPS73118DBVR also offers robust overload and over-temperature protection, as well as excellent transient response and minimal power dissipation.

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