Dual Slot Hot Swap Controller for PCI Express Features: Allows Live Insertion into PCI Express® Backplane Controls Two Independent PCI Express Slots Independent Control of Main and Auxiliary Supplies 20V Rating for 12V Supply Input Pins Integrated 0.25Ω AUX Switches Limits Fault Current in ≤1µs Force On Test Mode Adjustable Supply Voltage Power-Up Rate High Side Drivers for N-Channel MOSFETs Thermal Shutdown Protection Available in 38-Lead QFN and 36-Lead SSOP Packages

Rugged, CompactPCI Bus Hot Swap Controllers Features: Controls –12V, 3.3V, 5V and 12V Supplies ±14.4V Absolute Maximum Rating for 12VIN and –12VIN Input Pins Insensitive to Supply Voltage Transients Adjustable Foldback Current Limit with Circuit Breaker LOCAL_PCI_RST# Logic On-Chip PRECHARGE Output Biases I/O Pins During Card Insertion and Extraction LTC4244-1 Designed for Applications without –12V Available in 20-Lead Narrow SSOP Package

Rugged, CompactPCI Bus Hot Swap Controllers Features: Controls –12V, 3.3V, 5V and 12V Supplies ±14.4V Absolute Maximum Rating for 12VIN and –12VIN Input Pins Insensitive to Supply Voltage Transients Adjustable Foldback Current Limit with Circuit Breaker LOCAL_PCI_RST# Logic On-Chip PRECHARGE Output Biases I/O Pins During Card Insertion and Extraction LTC4244-1 Designed for Applications without –12V Available in 20-Lead Narrow SSOP Package

Rugged, CompactPCI Bus Hot Swap Controllers Features: Controls –12V, 3.3V, 5V and 12V Supplies ±14.4V Absolute Maximum Rating for 12VIN and –12VIN Input Pins Insensitive to Supply Voltage Transients Adjustable Foldback Current Limit with Circuit Breaker LOCAL_PCI_RST# Logic On-Chip PRECHARGE Output Biases I/O Pins During Card Insertion and Extraction LTC4244-1 Designed for Applications without –12V Available in 20-Lead Narrow SSOP Package

Rugged, CompactPCI Bus Hot Swap Controllers Features: Controls –12V, 3.3V, 5V and 12V Supplies ±14.4V Absolute Maximum Rating for 12VIN and –12VIN Input Pins Insensitive to Supply Voltage Transients Adjustable Foldback Current Limit with Circuit Breaker LOCAL_PCI_RST# Logic On-Chip PRECHARGE Output Biases I/O Pins During Card Insertion and Extraction LTC4244-1 Designed for Applications without –12V Available in 20-Lead Narrow SSOP Package

Multiple Supply Hot Swap Controller with I2C Compatible Monitoring Features: Allows Safe Insertion into Live CompactPCI™ or PCI Express™ Backplane 8-Bit ADC Monitors Current and Voltage I2C™/SMBus Interface dI/dt Controlled Soft Start Simultaneous or Sequenced Turn-On ±20V Absolute Maximum Rating for ±12V Supplies No External Gate Capacitor Required Dual-Level Circuit Breaker and Current Limit Bus Precharge Output Power Good Input with Timeout Optional Latch-off or Autoretry After Faults Alerts Host After Faults Integrated LOCAL_PCI_RST# Logic 36-Pin SSOP and 38-Pin (5mm × 7mm) QFN Packages

Multiple Supply Hot Swap Controller with I2C Compatible Monitoring Features: Allows Safe Insertion into Live CompactPCI™ or PCI Express™ Backplane 8-Bit ADC Monitors Current and Voltage I2C™/SMBus Interface dI/dt Controlled Soft Start Simultaneous or Sequenced Turn-On ±20V Absolute Maximum Rating for ±12V Supplies No External Gate Capacitor Required Dual-Level Circuit Breaker and Current Limit Bus Precharge Output Power Good Input with Timeout Optional Latch-off or Autoretry After Faults Alerts Host After Faults Integrated LOCAL_PCI_RST# Logic 36-Pin SSOP and 38-Pin (5mm × 7mm) QFN Packages

30m RON 12V Octal Electronic Circuit Breaker with SPI Interface Features: Eight Channels – 8× SPST Circuit Breaker Threshold Up to 1.5A Programmable in 50mA Increments 20% Accurate Threshold 30mΩ On Resistance Operating Range: 0V to 13.2V SPI Interface with Daisy-Chain Mode Common Open-Drain FAULT Status Output 24-Lead 3mm × 5mm QFN

30m RON 12V Octal Electronic Circuit Breaker with SPI Interface Features: Eight Channels – 8× SPST Circuit Breaker Threshold Up to 1.5A Programmable in 50mA Increments 20% Accurate Threshold 30mΩ On Resistance Operating Range: 0V to 13.2V SPI Interface with Daisy-Chain Mode Common Open-Drain FAULT Status Output 24-Lead 3mm × 5mm QFN

65V Dual Electronic Circuit Breaker with Current Monitors Features: High Voltage Dual SPST, Current Sharing Allowed 5% Accurate Analog Current Monitor Outputs Adjustable Circuit Breaker Thresholds to 1.2A Filtered (50μs) Primary OC Threshold Fast (2μs) Secondary OC Threshold 75mΩ Integrated Switches Automatic Inrush Control Short-Circuit Protection Precision Enable Inputs Open-Drain, Ready Status Outputs 16-Lead 3mm × 3mm LQFN and 12-Lead (Skipped Lead) 3mm × 4mm LQFN

Negative Voltage Hot Swap Controllers in SOT-23 Features: Allows Safe Board Insertion and Removal from a Live –48V Backplane Floating Topology Permits Very High Voltage Operation Low Profile (1mm) ThinSOT™ Package Programmable Analog Current Limit with Circuit Breaker Timer Fast Response Time Limits Peak Fault Current Programmable Timer Programmable Undervoltage/Overvoltage Protection

Negative Voltage Hot Swap Controllers in SOT-23 Features: Allows Safe Board Insertion and Removal from a Live –48V Backplane Floating Topology Permits Very High Voltage Operation Low Profile (1mm) ThinSOT™ Package Programmable Analog Current Limit with Circuit Breaker Timer Fast Response Time Limits Peak Fault Current Programmable Timer Programmable Undervoltage/Overvoltage Protection

Negative Voltage Hot Swap Controllers in SOT-23 Features: Allows Safe Board Insertion and Removal from a Live –48V Backplane Floating Topology Permits Very High Voltage Operation Programmable Analog Current Limit with Circuit Breaker Timer Fast Response Time Limits Peak Fault Current Improved Ruggedness Shunt Regulator Programmable Timer Programmable Undervoltage/Overvoltage Protection Low Profile 6-Lead SOT-23 (ThinSOT™) Package

Negative Voltage Hot Swap Controllers in SOT-23 Features: Allows Safe Board Insertion and Removal from a Live –48V Backplane Floating Topology Permits Very High Voltage Operation Low Profile (1mm) ThinSOT™ Package Programmable Analog Current Limit with Circuit Breaker Timer Fast Response Time Limits Peak Fault Current Programmable Timer Programmable Undervoltage/Overvoltage Protection

Negative Voltage Hot Swap Controllers in SOT-23 Features: Allows Safe Board Insertion and Removal from a Live –48V Backplane Floating Topology Permits Very High Voltage Operation Low Profile (1mm) ThinSOT™ Package Programmable Analog Current Limit with Circuit Breaker Timer Fast Response Time Limits Peak Fault Current Programmable Timer Programmable Undervoltage/Overvoltage Protection

IEEE 802.3af PD Power over Ethernet Interface Controller Features: Complete Power Interface Port for IEEE 802.3af® Powered Devices (PDs) Onboard 100V, 400mA Power MOSFET Precision Input Current Limit Onboard 25k Signature Resistor Programmable Classification Current (Class 0-4) Undervoltage Lockout Smart Thermal Protection Power Good Signal Available in 8-Pin SO and Low Profile (3mm × 3mm) DFN Packages

Quad IEEE 802.3af Power over Ethernet Controller with Integrated Detection Features: Controls Four Independent -48V Powered Ethernet Ports Each Port Includes: IEEE 802®.3af Compliant PD Detection and Classification Output Current Limit with Foldback Short-Circuit Protection with Fast Gate Pull-Down PD Disconnect Using DC Sensing Power Good Indication Operates Autonomously or by I2C™ Control 4-Bit Programmable Digital Address Allows Control of Up to 64 Ports Programmable INT Pin Eliminates Software Polling Current and Duty Cycle Limits Protect External FETs Available in a 36-Pin SSOP Package

Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect Features: Controls Four Independent – 48V Powered Ethernet Ports Each LTC4259A-1 Port Includes: – IEEE 802®.3af Compliant PD Detection and Classification – Output Current Limit with Foldback – Short-Circuit Protection with Fast Gate Pull-Down – PD Disconnect Using AC or DC Sensing – Improved AC Disconnect – Improved UVLO Operates Autonomously or Controlled by I2C™ Serial Interface 4-Bit Programmable Digital Address Allows Control of Up to 64 Ports Current and Duty Cycle Limits Protect External FETs IMPROVED UVLO

Positive High Voltage Hot Swap Controller with I2C Compatible Monitoring 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

Positive High Voltage Hot Swap Controller with I2C Compatible Monitoring 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