LTC2901-1CGN

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Power Management Integrated Circuits (PMICs) play an important role in modern electronic systems like portable and wearables, smartphones and tablet, for providing a reliable power supply for any application. PMICs regularly monitor system voltages, currents, and temperatures and make sure that the device works in a safe and reliable manner. Supervisors are a type of PMICs, and a commonly used supervisor integrated circuit is LTC2901-1CGN.

The LTC2901-1CGN is a supervisor IC from Linear Technology. It is a general purpose programmable supervisory circuit, ideal for any application that requires monitoring supply voltage, battery voltage, temperature and open-drain flag outputs. It is dust proof, moisture proof and shock resistant, making it suitable for use in harsh environments. The IC is designed to replace discrete components such as voltage references, resistors and zeners to provide reduced board space, longer battery life and better performance.

The LTC2901-1CGN monitors up to four voltages, two temperatures and one open drain flag output. It has an on-chip voltage reference and voltage detector that can be programmed to detect voltages as low as 2.6V with an accuracy of ±10mV. It can also be used to detect temperature using its on-chip diode temperature sensor with a range of -40°C to +125°C. The device also has an open-drain output flag to indicate a warning or fault condition.

The LTC2901-1CGN provides an adjustable voltage monitoring window and an adjustable temperature window, which can be used to generate an alert signal when the measured voltage or temperature is outside the specified range. The adjustable window feature is helpful in preventing false trip points and providing reliable operation. The device is available in a variety of package types, ranging from 8-pin DFN to 16-pin TSSOP.

The IC is also extremely power efficient, consuming only 125µA at 3.3V, making it suitable for portable devices. The LTC2901-1CGN features an open drain Active-LOW PMOS output to indicate the fault condition and hence, the current is low even when the voltage is high. To increase the robustness of the IC, it also has an on-chip thermal limitation feature to protect itself from high temperatures.

The LTC2901-1CGN is designed to replace complex discrete monitoring circuit, and provides a simple and reliable solution for monitoring system voltages, battery voltages, temperatures and open drain flag outputs. The IC is applicable in a wide range of applications areas, ranging from industrial and automotive applications to consumer products. It is especially suitable for applications that require reliable monitoring of multiple parameters and generating fault signals when those parameters go out of range.

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