LTC4215CUFD-2#PBF

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PMIC (Power Management Integrated Circuit) is a type of integrated circuit, which is primarily used for managing and supervising the operations of a computer or other electronic device. One particular branch of PMIC, namely Hot Swap Controllers, are utilized for providing appropriate and regulated power to any electronic device which is intended to be released, as well as providing a safe surroundings where the device can be securely prolonged and/or replaced while power is sustained to the system. One such device which belongs to this branch is the LTC4215CUFD-2#PBF. This particular power controller utilizes Linear Technology’s cutting edge hot swap technology to provide high quality levels of power and temperature protection to any intended electronic device.

Specifically, the LTC4215CUFD-2#PBF is a Hot Swap controller which is tailored to meet the demands of environments which experience extreme levels of shock and vibration, as well as withstand prolonged periods of exposure to high temperatures, such as what can be found in an industrial environment. Also, it offers high levels of EMI (electromagnetic interference) protection, as well as transient immunity. The power controller is an ideal choice for use in embedded systems, military and aerospace, railway, security and automotive applications, in which hot swapping and/or power conditioning is needed.

In terms of its application field, the LTC4215CUFD-2#PBF has a variety of uses, most of which encompass providing protection and power safety in a given device/system. The controller was designed as a single-channel controller which condenses the power management control circuitry and MOSFETs in a single 7mm × 5mm surface-mount pacakage. Eight pins are provided to facilitate power input and enable peripheral controls, such as alarm outputs and EN/UV pin controls.

When referring to the general functionality of the LTC4215CUFD-2#PBF, the following features are given:

• Wide power supply voltage range: 0.3 V to 18 V.
• Built-in current limiting and thermal protection circuitry.
• External MOSFETs which vent off overtemperature of the system/device.
• User programmable current limit
• Soft-start capability
• Automatic turn-on MOSFET operation.

In terms of working principle, the LTC4215CUFD-2#PBF components are powered by a universal power source, which can range anywhere from 0.3 V to 18 V. The source readings are monitored by the PMIC. When monitoring a load, the controller is capable of detecting any sudden changes in load, such as in the event of an overload/short circuit. When these events happen, the controller immediately shuts off the power coming from the power source and begins to reduce the current flowing through the load in order. Also, the controller can be programmed with a user-defined current limit, this is useful when balancing out the loads of system which have multiple power supply voltage sources. Additionally, the controller can be programmed with a soft-start capability to reduce in-rush current and limit the amount of switch-on surges in an electrical system. In conjunction, the PMIC contains a built-in temperature limiting circuit which senses when the temperature comes too close to a user-defined limit. In these cases, the controller begins to vent off excess heat by automatically turning off one or more MOSFETs.

Overall, the LTC4215CUFD-2#PBF is a power management integrated circuit which was developed to provide regulated and protected power to devices and/or systems which are subjected to extreme environments. The device belongs to PMIC’s Hot Swap Controllers branch and is capable of regulating and monitoring temperatures, limiting current overloads or short circuits, reducing in-rush current, and providing thermal heat protection from external elements.

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