LTC4226 - Wide Operating Range Dual Hot Swap Controller
- Allows Safe Board Insertion into Live Backplane
- Selectable Current Limit and Dual-Rate Timer Accommodate Load Surges
- Fast Response Limits Peak Fault Current
- Wide Operating Voltage Range: 4.5V to 44V
- Optional Auto-Retry or Latchoff after Overcurrent Fault
- High Side Drive for External N-Channel MOSFET
- Allows Parallel Power Paths for High Current Applications
- Available in 16-Pin QFN (3mm × 3mm) and MSOP Packages
The LTC4226 dual Hot Swap™ controller allows two power paths to be safely inserted and removed from a live backplane or powered connector. Using N-channel pass transistors, supply voltages ranging from 4.5V to 44V are ramped up at an adjustable rate.
Three selectable ratios of current limit to circuit breaker threshold accommodate noisy loads and momentary high peak currents without interruption, while a dual-rate fault timer protects the MOSFET from extended output overcurrent events. FAULT outputs indicate the circuit breaker status.The LTC4226-1 remains off after a fault while the LTC4226-2 automatically retries after a 0.5s delay.
The LTC4226 can also be configured as a bidirectional current limiter/circuit breaker. For high current applications, two channels may be configured as parallel power paths.
PackagingFor complete and up to date package information and drawings, please refer to our packaging page
- Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
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- Apple FireWire/IEEE 1394
- Disk Drives
- Rugged 12V, 24V Applications
- Hot Board/Connector Insertion
- Uni/Bidirectional Current Limiter/Circuit Breaker
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