LTC4218 - Hot Swap Controller
The LTC®4218 is a Hot Swap™ controller that allows a board to be safely inserted and removed from a live backplane. An internal high side switch driver controls the gate of an external N-channel MOSFET for supply voltages from 2.9V to 26.5V. A dedicated 12V version (LTC4218-12) contains preset 12V specific thresholds, while the standard LTC4218 allows adjustable thresholds.
The LTC4218 provides an accurate (5%) current limit with current foldback limiting. The current limit threshold can be adjusted dynamically using an external pin. Additional features include a current monitor output that amplifies the sense voltage for ground referenced current sensing. Overvoltage, undervoltage and power good monitoring are also provided.
Features
Typical Application  | Applications
Packaging  |
Order Information
| Part Number | Package | Temp | Price(1-99) | Price (1k)* |
|---|---|---|---|---|
| LTC4218CDHC-12#PBF | 5x3 DFN-16 | C | $3.79 | $2.65 |
| LTC4218CDHC-12#TRPBF | 5x3 DFN-16 | C | $2.71 | |
| LTC4218CGN#PBF | SSOP-16 | C | $3.79 | $2.65 |
| LTC4218CGN#TRPBF | SSOP-16 | C | $2.71 | |
| LTC4218IDHC-12#PBF | 5x3 DFN-16 | I | $4.35 | $3.05 |
| LTC4218IDHC-12#TRPBF | 5x3 DFN-16 | I | $3.11 | |
| LTC4218IGN#PBF | SSOP-16 | I | $4.35 | $3.05 |
| LTC4218IGN#TRPBF | SSOP-16 | I | $3.11 |
Demo Boards
| Part Number | Description | Price |
|---|---|---|
| DC1052A-A | LTC4218 Demo Board: 12V and 24V, 7.5A Hot Swap Controller with Current Monitoring | $50.00 |
