The LTC4420CDD#PBF is a high-performance, dual-input PowerPath controller designed by Linear Technology to ensure seamless transitions between two DC power sources. This advanced prioritizer is housed in a compact DFN package, making it suitable for space-constrained applications in modern electronic systems.

Key Features:

• Automatic Switching: The LTC4420CDD#PBF automatically switches between supply sources in the event of a failure or reduction in power, ensuring a constant supply to the load without interruption.
• Wide Operating Range: With an operating range from 2.5V to 18V, this device can accommodate a broad spectrum of DC power sources, including batteries, wall adapters, and supercapacitors.
• Low Loss PowerPath: The integrated low-resistance MOSFETs ensure minimal voltage drop and power loss, making the LTC4420CDD#PBF highly efficient for power-sensitive applications.
• Adjustable Prioritization: Users can configure the prioritization of the inputs, enabling the selection of primary and secondary power sources as per the system requirements.
• Reverse Blocking: The device prevents reverse current, protecting the primary source from discharge into the secondary source.
• Thermal Protection: Built-in thermal protection safeguards the device against overheating, enhancing system reliability.

Applications:

The LTC4420CDD#PBF is ideal for a variety of applications where uninterrupted power is crucial. It is commonly used in:

• Portable and battery-powered equipment
• Redundant power supply systems
• Automotive and industrial systems
• Medical devices with critical power requirements
• Uninterruptible power supplies (UPS)

Reliability and Performance:

The robust design of the LTC4420CDD#PBF ensures that it can withstand the rigors of demanding applications. Its performance is characterized by fast switching, low quiescent current, and the ability to handle high surge currents, making it a reliable choice for systems that cannot afford power interruptions or delays in switching between sources.