LTC2911IDDB-3#TRPBF

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Power management integrated circuits (PMICs) are vital components of an electronic circuit, performing a variety of tasks to ensure proper power supply and efficiency. Supervisors, a subclass of PMICs, are especially important, as they are primarily responsible for detecting undervoltage and overvoltage conditions and providing necessary protection to the device. One of the most popular supervisors on the market is the LTC2911IDDB-3#TRPBF, a highly versatile and reliable component designed to help electronic device manufacturers keep their systems running smoothly. In this article, we will provide an overview of the LTC2911IDDB-3#TRPBF\'s application field and working principle.

Application Field and Features

The LTC2911IDDB-3#TRPBF is a 3V/5V/3.3V actionable supervisor that operates across a wide range of input voltages and can be used in a variety of applications such as voltage monitoring, undervoltage lockout, and brownout detection. It is also suitable for environment with power supply temperatures ranging from -40°C to 85°C. With an operating frequency of 1MHz and an operating current of only 20µA, the LTC2911IDDB-3#TRPBF provides a higher level of efficiency than most other supervisors. It also provides extended voltage monitoring, making it a great choice for automotive and industrial applications.

The LTC2911IDDB-3#TRPBF also offers a variety of other advanced features to improve the performance of electronic devices. These include a built-in power-on reset (POR) circuit, an ultra-low-power hibernate mode to conserve power, an adjustable voltage monitor window, and advanced input filter configuration options. Additionally, the POR output provides adjustable reset delays and auto-retry options to help ensure reliability.

Working Principle

The core of the LTC2911IDDB-3#TRPBF\'s functionality is its voltage monitoring circuit, which measures and compares the input voltage against factory programmed thresholds. When the input voltage rises or falls below a predetermined threshold, the supervisor output is triggered and sets the status flag accordingly. The status flag is then reset after the input voltage reaches its original position, enabling the system to continue to operate.

The LTC2911IDDB-3#TRPBF also features an adjustable voltage monitor window, allowing users to select a specified voltage range between two predefined thresholds. This provides more precise control over the voltage monitoring process, making it even more accurate and reliable. The monitor window can be configured via the pin-programmable digital potentiometer, which also allows for fine tuning of the reset delay and auto-retry options.

The power-on reset (POR) circuit is another important feature of the LTC2911IDDB-3#TRPBF. This circuit detects when the input power supply drops below a certain voltage, and then asserts a reset signal to the system, ensuring a safe power-on and proper operation. The POR output provides adjustable reset delays, allowing users to configure the reset time to meet the requirements of their system. Additionally, the auto-retry feature allows the supervisor to retry the POR sequence after a certain amount of time if the reset fails.

The LTC2911IDDB-3#TRPBF also offers a soft start feature that is used to reduce inrush current when power is applied to a system. This feature works by ramping up the output voltage gradually over a specified time period, thus eliminating any potential overloads when powering up the system.

Conclusion

The LTC2911IDDB-3#TRPBF is a highly versatile and reliable supervisor for both automotive and industrial applications. It features an adjustable voltage monitor window and adjustable reset delays, all enabled by the pin-programmable digital potentiometer. It also features a power-on reset (POR) circuit and soft start feature that are both important for ensuring reliable performance. With its wide input voltage range and increased efficiency, the LTC2911IDDB-3#TRPBF is an ideal choice for voltage monitoring, undervoltage lockout, and brownout detection.

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