The LTC4286 is an integrated solution for hot-swap applications allowing a board to be safely inserted and removed from a live backplane. The circuit breaker timer protects against metal-oxide semiconductor field-effect transistor (MOSFET) overheating, enabling reliable protection against overstress.
The LTC4286’s SMBus 3.1 interface, PMBus command structure and onboard analog-to-digital converter (ADC) with selectable averaging and speed allow monitoring of board current, voltage, power, temperature and fault status.
The LTC4286 has additional features to respond to input undervoltage (UV) and overvoltage (OV): interrupts the host when a fault occurs, notifies when output power is good, detects insertion of a board and auto-reboot after a programmable delay following a host commanded turn off.
Key Features and Benefits
- Single MOSFET mode simplifies design
- Industry-standard PMBus® telemetry
- Wide operating voltage range: 8.5 V to 80 V
- Monitors currents, voltages, and power with ADC
- Adjustable, 5% accurate current limit: 6 mV to 20 mV
- Current foldback limits MOSFET power dissipation for overstress protection
- Monitors VGS and VDS for MOSFET health
- Peak detect registers for current, voltage, and power
- Reports input or output power
- Remote temperature sensing with programmable warning and shutdown thresholds
- ±1% accurate, 12-bit ADC for IOUT, VIN, and VOUT
- Available in 39-lead, 7 mm x 7 mm, QFN package
Applications
- High availability server backplane systems
- 12 V/24 V/48 V/54 V Distributed power systems
- Industrial
Evaluation Board
The LTC4286 can be evaluated with the EVAL-LTC4286-A1Z.
Block Diagrams and Tables
