LTC2911IDDB-2#TRMPBF

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Power management integrated circuits (PMICs) are devices responsible for efficiently converting, controlling and monitoring the required power for any given application. The PMICs are typically segmented into various categories such as voltage regulators (LDOs, switching regulators, etc.), power switches, supervisors and energy storage ICs. Supervisors are responsible for protecting the system from undesired states and are commonly integrated in almost every power management design.The LTC2911IDDB-2#TRMPBF which belongs to the PMIC – Supervisors family,is a highly integrated supervisor designed to monitor three power supply rails. It provides a greatly enhanced system reliability making it one of the most reliable solutions in the market.

The main application field of the LTC2911IDDB-2#TRMPBF is in power-critical safety systems and variable speed drives,which require sustained high performance and reliability even in harsh environmental conditions. It integrates an LDO, comparators, an accurate temperature measurement circuit and protection functions, all in the same package. The output stage of the LTC2911 is protected and regulated by the load switch (LDO) for stable power supply. Moreover, it includes various power detection, monitoring and safety features which guarantee a high performance.

In detail,the LTC2911IDDB-2#TRMPBF can regulate two independent voltage supplies (V1 and V2), and monitor the absolute value (V1ABS) of the current supplied from a source attached to the V3 pin. The outputs of all the regulators are current-limited for extra protection and the temperature input can be used for various temperature-dependent protection functions. Also, the device supports open, short and overvoltage conditions on all voltage rails. The fault threshold values are configurable and can also be set as window voltage comparators. The fault tolerant time is also programmable and can be set as long as 1000 seconds. Finally, an extra reset pin is integrated on the device in case of reset during overvoltage or over temperature conditions.

The LTC2911IDDB-2#TRMPBF is also engineered with Reverse Differential Adaptive MOSFET (RDS/AMOS) technology that provides ultra-low on-resistance, ensuring optimal power supply efficiency. The device is available in an industrial temperature grade of -40 to 105 C, and dissipates only 163 mW in operation. The small size of the device is ideal for space-constricted applications.Overall, the functionalities, protection features and wide operating temperature make the LTC2911IDDB-2#TRMPBF an optimal supervisor for safety and variable speed drives applications.

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