LTC2965CDD#PBF

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The LTC2965CDD#PBF is a supervisor/battery monitor from Linear Technology, a subsidiary of Analog Devices, with an ultra-small footprint (2mm x 2mm) and low operating current (10µA typical!). It features a low-voltage operation of 1.5V, making it ideal for use in battery-powered systems and over-voltage protection applications where space and power dissipation are a priority.

The LTC2965CDD#PBF offers a wide range of protection and monitoring features, including:

• Voltage, current and temperature monitoring
• Programmable thresholds and delays
• Undervoltage lock-out reset
• Built-in watchdog timer
• Pushbutton reset input
• Wide adjustable supply range
• Serial communication with I2C or SPI
• Flexible IO modes, including digital comparator and open drain outputs

The LTC2965CDD#PBF is ideally suited for use in a wide range of applications, including smart battery chargers, digital systems, and automotive applications. Its low-voltage operation, wide adjustable supply range, and programmable thresholds make it a versatile and cost-effective battery monitoring solution.

Working Principle of the LTC2965CDD#PBF

The LTC2965CDD#PBF supervisor/battery monitor monitors multiple voltage and temperature parameters in a system and provides accurate, reliable alerts to the user in the event of an abnormality. The device operates over an adjustable supply range of 1.5V to 3.3V, and is capable of providing thresholds, delays, and active-high and active-low outputs that can be tailored to a wide range of applications.

The onboard programmable watchdog timer can be programmed to reset the system after a pre-defined interval, with a maximum time-out period of 8 seconds. The watchdog timer can also be used to circuit test, or to switch off the power if a fault is detected. The watchdog timer is capable of generating a pulse with a width of at least 100 µs, and is highly resistant to electromagnetic interference, enabling reliable operation in harsh industrial environments.

The LTC2965CDD#PBF also features a pushbutton reset input, which can be used to reset or manually force the system to a known good state. The device can be configured so that the pushbutton must held down for a pre-defined amount of time to ensure that accidental activation is avoided. The device is also capable of providing a delay function, so that the system can be reset if a fault condition persists.

The device is also configurable via either I2C or SPI, allowing the user to tailor the monitoring thresholds and behavior of the device. This flexibility makes the LTC2965CDD#PBF an ideal solution for a variety of embedded monitoring applications.

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