LTC2902-2CGN

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PMIC (Power Management Integrated Circuit) Supervisors are an important component for managing power control in a system. The LTC2902-2CGN is an integrated triple channel voltage supervisor, ideal for monitoring three independent voltages in applications where a high level of accuracy is required. This article will discuss the application field and working principle of the LTC2902-2CGN.

Application Field

The LTC2902-2CGN is specifically designed for precision voltage measurement or monitoring of three independent voltage rails. It can be used in a wide range of applications such as cell phones, batteries, USB charging, consumer products, and other industrial applications. All three channels have a 2.9V precision comparator threshold and hysteresis, making them perfect for monitoring a variety of voltages from 1.2V to 5.5V. It helps to protect sensitive electronics from out-of-range conditions and other abnormal power situations.

Working Principle

The LTC2902-2CGN operates by measuring the voltage at each of its three input channels and then compares it to the absolute accuracy threshold of 2.9V. If the voltage is exceeding the 2.9V limit, then the LTC2902-2CGN will shut off the respective channel, protecting the system from overvoltage. In addition, the LTC2902-2CGN also has a programmable delay timer, which can be used to delay the shut off signal by a set amount of time (up to 60 seconds). This feature can help to prevent any sudden power outages.

The LTC2902-2CGN is also equipped with an open-drain reset signal operating at 1.5V, which can be used to alert the system of out of range conditions. This reset signal can easily be programmed with either a manual reset, such as a button, or an automated reset from a host processor. Lastly, the LTC2902-2CGN has built-in POR (power-on reset), meaning that it can start up and initialize itself even when no power is available.

Conclusion

The LTC2902-2CGN is a triple channel voltage supervisor designed for precision voltage measurement and monitoring of three independent voltage rails in a variety of applications. Its precision comparator threshold and hysteresis and programmable delay timer make it perfect for protecting sensitive electronics from out-of-range conditions and other abnormal power situations. Lastly, its open-drain reset signal and power-on reset functionality make it ideal for both manual and automated systems.

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