TLC7701IPW

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Introduction to TLC7701IPW

The TLC7701IPW is a precision, low power, CMOS voltage supervisor, or supervisory circuit, manufactured by Texas Instruments. The TLC7701IPW is a micro-power supervisor chip that supervises the output of processors, memories, and other peripheral circuits. The circuit also provides accurate voltage detection both below and above a selected trip point, as well as Power-On-Reset generation.

Applications of TLC7701IPW

The TLC7701IPW is a versatile supervisory circuit typically used in the battery operated mobile devices, such as smartphones, tablets, and wearables. It is also used in other portable devices, motion control systems, SCADA systems, and other industrial systems.

The circuit is also used for system reset and power on reset functions as well as for analog and digital power monitoring, over/under voltage detection, and protection of core processor in memory systems.

Features of TLC7701IPW

The TLC7701IPW is a precision low power supervisor that provides an accurate voltage detection scheme, both below and above a selected trip point. It provides power supply controller and power supply monitoring. Its features include a power-on reset generation, with an active-low output pin configured to indicate when the voltage supply has been restored to normal operating level. This reset is generated once the power-on reset begin to fall within the range of 1.3V to 3.2V (typical).

The TLC7701IPW also has two built-in hysteresis points, one for the under-voltage protection and one for the overvoltage protection. The hysteresis ensures that no false over/under voltage detections occur during power supply transients. The circuit also includes an internal pull down switch and internal pull up resistor.

In addition, the circuit contains a status output pin, which changes its logic state depending upon the voltage level at the voltage supervisor pin. The circuit\'s layout and circuitry design is optimized to minimize power consumption, thus facilitating a wide range of applications. Moreover, the circuit also has a low probability of false triggering.

Working Principle of TLC7701IPW

The TLC7701IPW circuit works based on a voltage-level detection system with two level hysteresis points: one for undervoltage and one for overvoltage detection. The undervoltage and overvoltage trip points are adjusted with the help of an external resistor, with a range of 0.8 V to 6.0 V. When the voltage at the voltage monitor pin (VM) is higher than the lower hysteresis voltage level, a logic state 0 is generated at the status pin (ST). On the contrary, when the VM voltage is lower than the upper hysteresis voltage, a logic state 1 is generated at the status pin (ST). Thus, the circuit enables the smooth operation of power supply systems and the protection from power supply fluctuations.

Conclusion

The TLC7701IPW is a versatile low power voltage supervisor circuit from Texas Instruments. The circuit is typically used for system reset and power-on reset, analog and digital power monitoring, and over/under voltage detection for core processors and memory systems. The circuit works based on a voltage-level detection system with two level hysteresis points, with an external precision resistor to set the hysteresis levels. The TLC7701IPW also features an active-low output pin configured to indicate when the voltage supply has been restored to a normal operating level.

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