Wide Input Range Synchronous Regulator Controller with Accurate Current Limit Features:Wide Input Range: 2.5V to 60VIntegrated Buck-Boost Supply for 7.5V MOSFET Gate DriveProgrammable Constant-Current Operation with Current Monitor OutputLow IQ: 75μA, 12VIN to 3.3VOUTSelectable Low Output Ripple Burst Mode® OperationVOUT Up to 60VAdjustable and Synchronizable: 50kHz to 1MHzInternal OVLO Protects for Input Transients Up to 80VAccurate Input Overvoltage and Undervoltage ThresholdProgrammable Soft-Start with Voltage TrackingPower Good and Output OVP28-Lead TSSOP and 38-Lead 4mm × 6mm QFN Packages

Wide Input Range Synchronous Regulator Controller with Accurate Current Limit Features:Wide Input Range: 2.5V to 60VIntegrated Buck-Boost Supply for 7.5V MOSFET Gate DriveProgrammable Constant-Current Operation with Current Monitor OutputLow IQ: 75μA, 12VIN to 3.3VOUTSelectable Low Output Ripple Burst Mode® OperationVOUT Up to 60VAdjustable and Synchronizable: 50kHz to 1MHzInternal OVLO Protects for Input Transients Up to 80VAccurate Input Overvoltage and Undervoltage ThresholdProgrammable Soft-Start with Voltage TrackingPower Good and Output OVP28-Lead TSSOP and 38-Lead 4mm × 6mm QFN Packages

Wide Input Range Synchronous Regulator Controller with Accurate Current Limit Features:Wide Input Range: 2.5V to 60VIntegrated Buck-Boost Supply for 7.5V MOSFET Gate DriveProgrammable Constant-Current Operation with Current Monitor OutputLow IQ: 75μA, 12VIN to 3.3VOUTSelectable Low Output Ripple Burst Mode® OperationVOUT Up to 60VAdjustable and Synchronizable: 50kHz to 1MHzInternal OVLO Protects for Input Transients Up to 80VAccurate Input Overvoltage and Undervoltage ThresholdProgrammable Soft-Start with Voltage TrackingPower Good and Output OVP28-Lead TSSOP and 38-Lead 4mm × 6mm QFN Packages

Boost DC/DC Converter with APD Current Monitor Features:65V, 350mA Internal DMOS SwitchIntegrated Schottky Diode2% Accurate APD Current Monitoring Over the 3μA to 3mA RangeSingle Resistor Programs Maximum APD CurrentFast APD Current Limiter with IndicatorProgrammable Loss-of-Signal IndicatorCTRL Pin Adjusts Output VoltageProgrammable VIN Undervoltage LockoutHigh Efficiency Step-Up ConverterSelectable 1MHz/2MHz Switching FrequencyInternally CompensatedInternal Soft-Start2.7V to 12V VIN RangeLow Shutdown Current: <1μA

High Input Voltage, Boost, Flyback, SEPIC and Inverting Converter Features: Wide Input Voltage Range: 5V to 80V Single Feedback Pin for Positive or Negative Output Voltage Internal 3.3A/84V Power Switch Current Mode Control Provides Excellent Transient Response Programmable Operating Frequency (100kHz to 1MHz) with One External Resistor Synchronizeable to an External Clock Low Shutdown Current < 1μA Internal 7.2V Low Dropout Voltage Regulator Programmable Input Undervoltage Lockout with Hysteresis Programmable Soft-Start Thermally Enhanced QFN (5mm × 6mm) Package

Positive High Voltage Hot Swap Controller with Open-Circuit Detect Features: Allows Safe Board Insertion and Removal from a Live Backplane Controls Supply Voltage from 10.8V to 80V Foldback Current Limiting Open Circuit and Overcurrent Fault Detect Drives an External N-Channel MOSFET Automatic Retry or Latched Off Operation After Overcurrent Fault Programmable Supply Voltage Power-Up Rate Open MOSFET Detection 1% Over and Undervoltage Detection Accuracy Available in a 16-Lead SSOP Package

IEEE 802.3bt PD Interface Controller Features: IEEE 802.3af/at/bt Powered Device (PD) Controller Supports Up to 71.3W PDs 5-Event Classification Sensing Superior Surge Protection (100V Absolute Maximum) Wide Junction Temperature Range (–40°C to 125°C) Overtemperature Protection Integrated Signature Resistor External Hot Swap N-Channel MOSFET for Lowest Power Dissipation and Highest System Efficiency Configurable Aux Power Support as Low as 9V Easy Migration Between LTPoE++® PDs and IEEE 802.3bt PDs Pin Compatible with LT4275A/B/C Available in 10-Lead MSOP and 3mm × 3mm DFN Packages

Secondary-Side Optocoupler Driver Features: 600mV Reference (1.25% Over Temperature) Wide Input Supply Range: 3V to 20V Overshoot Control Function Prevents Output Overshoot on Start-Up and Short-Circuit Recovery High Bandwidth Error Amplifier Permits Simple Loop Frequency Compensation Ground-Referenced Opto-Coupler Drive 10mA Opto-Coupler Drive with Current Limiting Low Profile (1mm) ThinSOT™ Package

Negative 48V Hot Swap Controller Features: Allows Safe Board Insertion and Removal from a Live –48V Backplane Circuit Breaker Immunity to Voltage Steps and Current Spikes Programmable Inrush and Short-Circuit Current Limits Pin Compatible with LT1640L/LT1640H Operates from –18V to –80V Programmable Overvoltage Protection Programmable Undervoltage Lockout Power Good Control Output Bell-Core Compatible ON/OFF Threshold

38V, 1.2A, 2MHz Step-Down Regulator with 2.8A Quiescent Current Features:Ultralow Quiescent Current: 2.8μA IQ Regulating 12VIN to 3.3VOUTFixed Output Voltages: 3.3V, 5V, 2.1μA IQ Regulating 12VIN to 3.3VOUTLow Ripple Burst Mode® Operation: Output Ripple < 15mVP-PWide Input Voltage Range: 4.3V to 38V1.2A Maximum Output CurrentAdjustable Switching Frequency: 200kHz to 2MHzSynchronizable Between 250kHz to 2MHzFast Transient ResponseAccurate 1V Enable Pin ThresholdLow Shutdown Current: IQ = 700nAPower Good FlagSoft-Start CapabilityInternal CompensationOutput Voltage: 1.19V to 30VSmall Thermally Enhanced 10-Lead MSOP, 16-Lead MSOP and (3mm × 3mm) DFN Packages