LTC4355CS#PBF - Diode-OR Controller from Linear Technology

The LTC4355CS#PBF is a high-performance diode-OR controller designed by Linear Technology, which is now part of Analog Devices. This product is engineered to provide an ideal solution for systems that require multiple power supply inputs to enhance reliability through redundancy. The LTC4355 controls external N-channel MOSFETs to function as ideal diodes, creating a low loss power path compared to the traditional use of Schottky diodes.

This controller is suitable for a wide range of applications, including telecom systems, servers, and industrial systems, where it is critical to maintain uninterrupted power. The LTC4355 offers a seamless transition between power sources by controlling the gate of the external MOSFETs, effectively reducing the voltage drop and power dissipation that would otherwise be present with Schottky diodes.

Key features of the LTC4355CS#PBF include its ability to operate over a wide voltage range of 9V to 80V, making it versatile for various supply voltages. It also provides a fast switch-over to the secondary supply when the primary supply fails, ensuring minimal interruption to the load. The controller includes a status output that indicates which input supply is currently being used, allowing for easy monitoring of the power path.

The LTC4355 also incorporates under-voltage lockout, overvoltage protection, and reverse input protection to safeguard against potential damage from abnormal supply conditions. Additionally, the device's low quiescent current ensures minimal impact on the overall power efficiency of the system.

The LTC4355CS#PBF comes in a compact 16-lead narrow SSOP package, which is ideal for space-constrained applications. Its robust design and comprehensive feature set make it an excellent choice for creating reliable, efficient, and redundant power supply systems.

For designers looking to improve power system reliability while minimizing voltage drops and power losses, the LTC4355CS#PBF diode-OR controller provides an advanced solution that is both effective and easy to implement.