TC1189QECTTR

The Linear Voltage Regulators is a device that maintains a stable output voltage by regulating the output voltage against the fluctuations of the input voltage, regardless of the changes in load current. TC1189QECTTR is a Linear Voltage Regulator Integrated Circuit, commonly known as a LDO and is an 3V, 200mA Low Dropout Voltage Regulator.

TC1189QECTTR Overview

The TC1189QECTTR is a low dropout (LDO) linear regulator integrated circuit that provides stable output loops internal to the device. It also offers a wide input voltage range of 3V to 18V. Additionally, the TC1189QECTTR has an improved current-limited output that enables low-current loads to remain functional during input voltage and output voltage fluctuations. The device also offers a low-power operation with a very low quiescent current of 20μA in quiescent mode and 100μA in power-saving mode.

The TC1189QECTTR has a built-in reset circuit that can detect and respond to an over voltage or under voltage event on the input pin or output pin, or both. An internal, fixed-with-temperature reset function is also available that provides an active-low reset signal when the input voltage is greater than 8.25V or less than 1.5V. This reset signal can be used to reset MCUs, such as AVR, ARM, and PIC, when the input voltage is below or above the reset threshold.

Internally, the TC1189QECTTR features 1.1V and 1.2V references, which can be used to generate other voltages. It also features an internal thermal shutdown circuit that enables it to protect itself and other electronic components by reducing the output voltage if the IC overheats. This also prevents damage resulting from EMF induced hot spots.

TC1189QECTTR Application Fields

The TC1189QECTTR can find applications in a wide range of industries. It is a high-accuracy, low-current linear voltage regulator, which makes it ideal for use in portable applications, such as cordless phones, cellular phones, modems, and power supplies. It can also be used in Industrial and Automotive applications. It is well suited to provide supply voltages to microcontrollers and DSPs, as well as for general board level supplies. Additionally, the device can operate over a wide temperature range of -40°C to +125°C.

TC1189QECTTR Working Principle

The TC1189QECTTR is a 3V, 200mA low dropout linear voltage regulator integrated circuit. It operates in a manner similar to other linear voltage regulators, such as the Zener diode. When the input voltage exceeds the output voltage, the LDO dissipates the excess energy in the form of heat and keeps the output voltage stable. In applications where the input voltage is not always greater than the output voltage, a reverse current condition may occur, in which case the regulator will stop providing the regulated output.

When the input voltage is greater than the output voltage, current flows from the input to the output through the regulator’s pass element, which is an internal series pass transistor. This current is regulated by an internal error amplifier, which senses any discrepancy between the reference voltage and the output voltage and adjusts the pass transistor accordingly. The error amplifier also ensures that any fluctuations in the input voltage or load current do not affect the output voltage significantly.

The TC1189QECTTR also includes an internal thermal protection circuit that shuts off the regulator if the IC overheats due to a high ambient temperature or sustained overload condition. The device will not be able to provide output current if the ambient temperature exceeds 125°C or the load current is greater than the rated output current.

Conclusion

The TC1189QECTTR is an efficient, low dropout linear voltage regulator integrated circuit. It features an improved current-limited output that makes it an ideal choice for providing power supplies in portable applications, industrial systems, and automotive systems. The device has built-in reset circuitry and thermal shutdown circuitry, which makes it well suited for protecting against voltage and current fluctuations. The device has a wide range of input and output voltages and can operate over a wide temperature range of -40°C to +125°C.