TLC7703IPWRG4

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Texas Instruments\' TLC7703IPWRG4 is a low-power, precision voltage supervisor and surveillance circuit solution designed to monitor system power supply and reset microprocessor or other integrated circuits when the supply voltage drops below an adjustable regulated threshold. Featuring an adjustable reset threshold, low running current, and low manufacturing cost, the TLC7703 is ideal for use in a variety of consumer, automotive, and industrial applications.

Features and Benefits

The TLC7703IPWRG4 is available in a 5-pin SOT-23 package, providing adjustable reset thresholds (nominally 2.4V to 4.5V*) which makes this device suitable for monitoring various supply voltages common to consumer, automotive, and industrial applications. It features a low reset voltage of 1.5V and a low supply current of 3μA. The TLC7703 further features a reset and active-low active-high output. The TLC7703 operates over a temperature range of -40°C to 85°C, making it suitable for use in extreme temperature environments.

Applications

The TLC7703IPWRG4 is ideally suited for a variety of applications including, but not limited to, the following: industrial computing, automotive control systems, consumer applications such as battery powered equipment, and networking systems.

Working Principle

The TLC7703 operates on a principle of monitoring supply voltage and asserting a reset output when the system voltage drops below a predetermined value. It contains an on-chip voltage supervisor that monitors a voltage reference connected to an external voltage divider circuit. When the system voltage drops below the reference voltage, an active-low (RESET) and active-high (RESET) output are asserted to indicate an out-of-tolerance condition. Both RESET and active-high outputs can be asserted for up to 5 msec. upon power up, after which the outputs are de-asserted until the monitored voltage drops another 0.2V.

The device contains an on-chip voltage supervisor that includes an adjustable voltage reference, DC comparator, and hysteresis. It is powered from a single supply source of 2.7V to 5.5V. The TLC7703 is available in different auto-zeroing reset delay times, which can be selected with the appropriate device number suffix. Features include a delay time of 4ms and a trickle charge current capacity of 1mA.

Conclusion

The TLC7703IPWRG4 is an ideal low-power, precision voltage supervisor and surveillance circuit for use in various consumer, automotive, and industrial applications. It features an adjustable reset threshold and low running current, making it an excellent choice for a variety of applications. The device operates over a temperature range of -40°C to 85°C, making it suitable for use in extreme temperature environments. It is available in a 5-pin SOT-23 package and contains an on-chip voltage supervisor that monitors a voltage reference connected to an external voltage divider circuit.

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