The LTC4217CFE 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 LTC4217CFE allows adjustable thresholds.
The LTC4217CFE 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.
Feature
- 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
Applications
- RAID Systems, Solid State Drives
- Server I/O Cards
- Industrial
(Picture: Pinout)
