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Design Note
Reliability Data
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LT Journal
Press Release
- 48V Hot Swap Controller Includes On-Chip ADC for Current & Voltage Monitoring
- Wide Operating Range Ideal Diode Controller Provides Negative Input Protection & Low Current Operation
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Linduino
Features
- Allows Safe Insertion into Live Backplane
- 8-Bit ADC Monitors Current and Voltage
- I2C/SMBus Interface
- Wide Operating Voltage Range: 8.5V to 80V
- High Side Drive for External N-Channel MOSFET
- Input Overvoltage/Undervoltage Protection
- Optional Latchoff or Autoretry After Faults
- Alerts Host After Faults
- Foldback Current Limiting
- Available in 24-Lead SO, 24-Lead Narrow SSOP and 32-Lead (5mm × 5mm) QFN Packages
Typical Application
Description
The LTC4260 Hot Swap controller allows a board to be safely inserted and removed from a live backplane. Using an external N-channel pass transistor, the board supply voltage can be ramped up at an adjustable rate. An I2C interface and onboard ADC allow monitoring of board current, voltage and fault status.
The device features adjustable analog foldback current limit with latch off or automatic restart after the LTC4260 remains in current limit beyond an adjustable time-out delay.
The controller has additional features to interrupt the host when a fault has occurred, notify when output power is good, detect insertion of a load card and power-up in either the on or off state.
5x5 QFN-32,SSOP-24,SW-24
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC4260CGN#PBF | SSOP | 24 | C | $8.50 | $5.95 |
| LTC4260CGN#TRPBF | SSOP | 24 | C | $6.05 | |
| LTC4260CSW#PBF | SO | 24 | C | $8.50 | $5.95 |
| LTC4260CSW#TRPBF | SO | 24 | C | $6.05 | |
| LTC4260CUH#PBF | QFN | 32 | C | $8.50 | $5.95 |
| LTC4260CUH#TRPBF | QFN | 32 | C | $6.05 | |
| LTC4260IGN#PBF | SSOP | 24 | I | $10.21 | $7.15 |
| LTC4260IGN#TRPBF | SSOP | 24 | I | $7.25 | |
| LTC4260ISW#PBF | SO | 24 | I | $10.21 | $7.15 |
| LTC4260ISW#TRPBF | SO | 24 | I | $7.25 | |
| LTC4260IUH#PBF | QFN | 32 | I | $10.21 | $7.15 |
| LTC4260IUH#TRPBF | QFN | 32 | I | $7.25 | |
| LTC4260CGN | SSOP | 24 | C | $17.00 | $11.90 |
| LTC4260CGN#TR | SSOP | 24 | C | $12.10 | |
| LTC4260CSW | SO | 24 | C | $17.00 | $11.90 |
| LTC4260CSW#TR | SO | 24 | C | $12.10 | |
| LTC4260CUH | QFN | 32 | C | $17.00 | $11.90 |
| LTC4260CUH#TR | QFN | 32 | C | $12.10 | |
| LTC4260IGN | SSOP | 24 | I | $20.42 | $14.30 |
| LTC4260IGN#TR | SSOP | 24 | I | $14.50 | |
| LTC4260ISW | SO | 24 | I | $20.42 | $14.30 |
| LTC4260ISW#TR | SO | 24 | I | $14.50 | |
| LTC4260IUH | QFN | 32 | I | $20.42 | $14.30 |
| LTC4260IUH#TR | QFN | 32 | I | $14.50 |
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC786A | LTC4260CGN | 200W Positive 48V Hot Swap Controller With Current and Voltage Monitoring (req DC590) | $100.00 |
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC2026C | Linduino One Isolated USB Demo Board: An Arduino- and QuikEval-Compatible Code Development Platform | $75.00 | |
| DC590B | Isolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards | $50.00 |