LTC1645CS - Dual Supply Hot Swap Controller from Linear Technology

The LTC1645CS is a sophisticated, dual hot swap controller designed by Linear Technology to manage the safe insertion and removal of circuit boards from live backplanes. This controller is specifically engineered to operate with dual supply systems, ensuring that both positive and negative supplies are properly controlled during the hot swap process. The LTC1645CS is housed in a compact 16-lead narrow SO package, making it an ideal choice for space-constrained applications.

The LTC1645CS offers an array of features that ensure the protection of the electronic system during hot swapping. It integrates an electronic circuit breaker function that provides adjustable overcurrent protection by monitoring the voltage drop across an external sense resistor. If an overcurrent condition is detected, the LTC1645CS reacts swiftly to disconnect the faulty card, thereby safeguarding both the card and the backplane from damage.

One of the key benefits of the LTC1645CS is its ability to independently control the two supply voltages. This means that it can manage the inrush current for both supplies, ensuring a smooth power-up sequence without causing any disturbance to the system. Furthermore, the device features a programmable timer that delays the activation of the external MOSFETs, which further helps in managing the inrush current and reducing the risk of system instability or voltage drops during the insertion process.

Additional features of the LTC1645CS include under-voltage lockout, which prevents the power supplies from being turned on if they are below a certain threshold, and overvoltage protection, which ensures that the supplies do not exceed safe operating levels. The device also offers status signaling through a FAULT output, which provides a clear indication of any fault condition to the system controller.

The LTC1645CS is an essential component for systems that require hot swap capability with maximum safety and reliability. Its robust design and comprehensive protection features make it an excellent choice for servers, RAID systems, telecommunications equipment, and other high-availability systems where uninterrupted service is critical.

Overall, the LTC1645CS from Linear Technology exemplifies a high level of engineering excellence, providing an efficient and secure solution for hot swapping dual supply systems.