Linear Technology LTC1728HS5-5 Microprocessor Supervisory Circuit

The LTC1728HS5-5 is a precision microprocessor supervisory circuit designed by Linear Technology to maintain system integrity in the event of power fluctuations or failures. This compact and efficient device is particularly suitable for portable and space-constrained applications due to its small footprint and low power consumption.

Featuring a fixed 5V output voltage, the LTC1728HS5-5 ensures that microprocessors and digital systems operate within their specified voltage range, thus providing a reliable reset signal to the microprocessor during power-up, power-down, and brown-out conditions. The reset timeout period can be set by an external capacitor, allowing designers the flexibility to tailor the reset signal timing to their specific application needs.

One of the key attributes of the LTC1728HS5-5 is its high accuracy. With a precise threshold voltage, this supervisory circuit maintains system stability and performance by closely monitoring the power supply levels. Its low supply current of only 30μA (typical) makes it an energy-efficient choice, contributing to the extended battery life of portable devices.

The LTC1728HS5-5 comes in a compact 5-lead SOT-23 package, which is ideal for systems where space is at a premium. Its small size does not compromise its performance or reliability, with features such as a low minimum supply voltage of 1V and an operating temperature range of -40°C to 125°C, ensuring functionality across a wide range of conditions.

Additional features include a manual reset input that allows for a system reset to be initiated at any time, and a reset output stage that can sink up to 20mA, providing the capability to reset even power-hungry microprocessors or to drive LEDs for visual status indication.

In summary, the LTC1728HS5-5 from Linear Technology is a robust and precise supervisory circuit that offers designers a reliable solution for monitoring power supply levels in microprocessor-based systems. Its small size, low power consumption, and flexible configuration options make it an excellent choice for a multitude of applications, from portable devices to complex digital systems.