LTC693CSW#PBF

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LTC693CSW#PBF is a closely monitored, low current CMOS shunt regulator, part of the Linear Technology PMIC – Supervisors series of devices. It is a voltage reference, voltage detector and reset generator, combining the functions of a supervisor and a 2-bit counter. LTC693CSW#PBF has several applications in automotive and power supply systems specifically in low-voltage monitoring and protection.

The LTC693CSW#PBF can detect a wide range of voltages between 0.9V and 12V with an accuracy and precision of 0.3% and 1% respectively. Its reset output operates at a nominal voltage of 1.1V and is adjustable with the crowbar resistor to a range between 0.73V and 1.5V. It also features an integrated N-Channel MOSFET, which is activated when the voltage at the high-side pin (VCC) goes below the reference threshold and must be reset either manually or automatically via a control terminal. The LTC693CSW#PBF is suitable for applications where both low-voltage protection and a reset for a wide range of device supply rails are desired.

The LTC693CSW#PBF voltage regulators also provide additional features such as Soft Start/Restart, which limits the inrush current at power up and prevents false resets. It also has a unique temperature-independent Reference Reset Delay (R-DLY) and a temperature-dependent debounce time, which applies when reset is applied while temperature is above 85°C. Additionally, with the no-reset version of the device, the reset output is disabled and therefore cannot cause a system reset.

The LTC693CSW#PBF voltage regulator has a wide range of applications, including microcontroller power-up reset, power supply rails monitoring, battery powered equipment protection, monitoring of automotive and industrial edge computing systems, and as a reset or power-on reset controller in embedded systems. It is also used in medical devices, telecom and networking equipment, automotive electronics, and other low-power systems.

The working principle of the LTC693CSW#PBF is based on the voltage regulation of the supervisor. It monitors the input voltage at the high side pin (VCC) and maintains a regulated output voltage at the reset output pin. The reset output voltage is either generated or held low, based on the voltage of VCC. When VCC voltage drops below the reference voltage set by the on-chip resistor or by the external resistor attached to the adjustable reference pin (VREF), the reset output voltage goes high and the reset counter starts counting from its set value, 6 seconds. If the reset output voltage is held low, the counter doesn\'t count and the reset output stays low. When VCC voltage goes above adjusted reference voltage, the reset output voltage will again go low, resetting the counter and starting it again.

The LTC693CSW#PBF is a highly reliable device that provides superior reset accuracy and protection for automotive and industrial systems. It ensures fast, accurate and reliable system protection from over voltage, over current, and temperature fluctuations. This device is ideal for low-voltage, high-current monitoring and protection applications, as it requires minimum board space and components while providing superior performance. Its high accuracy and stability, combined with its low power consumption, make it the best choice for a wide range of applications in the automotive and industrial sectors.

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