2A Integrated Hot Swap Controller

The LTC4217 is an integrated solution for Hot Swap applications that allows a board to be safely inserted and removed from a live backplane. The part integrates a Hot Swap controller, power MOSFET and current sense resistor in a single package for small form factor applications. A dedicated 12V version (LTC4217-12) contains preset 12V specific thresholds, while the standard LTC4217 allows adjustable thresholds.

The LTC4217 provides separate inrush current control and a 5% accurate 2A current limit with foldback current limiting. The current limit threshold can be adjusted dynamically using an external pin. Additional features include a current monitor output that amplifies the sense resistor voltage for ground referenced current sensing and a MOSFET temperature monitor output. Thermal limit, overvoltage, undervoltage and power good monitoring are also provided. For a 5A pin compatible version, see LTC4232.

Applications

* RAID Systems, Solid State Drives

* Server I/O Cards

* Industrial

* Small Footprint

* 33mΩ MOSFET with RSENSE

* Wide Operating Voltage Range: 2.9V to 26.5V

* Adjustable, 5% Accurate Current Limit

* Current and Temperature Monitor Outputs

* Overtemperature Protection

* Adjustable Current Limit Timer Before Fault

* Power Good and Fault Outputs

* Adjustable Inrush Current Control

* 2% Accurate Undervoltage and Overvoltage Protection

* Pin Compatible with LTC4232 (DFN Package Only)

* Available in 20-Lead TSSOP and 16-Lead 5mm × 3mm DFN Packages