Microprocessors Supervisory Circuit in 4-Lead SOT-143, Logic Low RESET Bar Output Features: Superior upgrade for MAX811/MAX812 Specified over temperature Low power consumption: 5 μA typical Precision voltage monitor: 2.5 V, 3 V, 3.3 V, 5 V options Reset assertion down to 1 VCC Power-on reset: 140 ms minimum Logic low RESET output Built-in manual reset

42V, 2A/3A Peak Synchronous Step-Down Regulator with 2.5A Quiescent Current Features: Silent Switcher® 2 Architecture Ultralow EMI Emissions on Any PCB Eliminates PCB Layout Sensitivity Internal Bypass Capacitors Reduce Radiated EMI Optional Spread Spectrum Modulation Wide Input Voltage Range: 3.0V to 42V Ultralow Quiescent Current Burst Mode® Operation: <2.5µA IQ Regulating 12VIN to 3.3VOUT Output Ripple <10mVP-P High Efficiency 2MHz Synchronous Operation: >93% Efficiency at 1A, 12VIN to 5VOUT 2A Maximum Continuous Output, 3A Peak Transient Output Fast Minimum Switch-On Time: 45ns Adjustable and Synchronizable: 200kHz to 2.2MHz Allows Use of Small Inductors Low Dropout Peak Current Mode Operation Internal Compensation Output Soft-Start and Tracking Small 16-Lead 3mm × 3mm LQFN Package AEC-Q100 Qualified for Automotive Applications

IEEE 802.3bt PD Interface with Forward/Flyback Controller Features: IEEE 802.3af/at/bt Powered Device (PD) with Forward/Flyback 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) >94% End-to-End Efficiency with LT4321 Ideal Bridge External Hot Swap N-Channel MOSFET for Lowest Power Dissipation and Highest System Efficiency No-Opto Flyback Operation Auxiliary Power Support as Low as 9V Easy Migration of LTPoE++® PDs to IEEE 802.3bt PDs Pin Compatible with LT4276A/B/C 28-Lead 4mm × 5mm QFN Package

High Voltage Boost Charge Pump Features: Wide Input Range: 4.5V to 55V VIN/VAUX Reverse Input Protection to –55V Split Input Supplies for High Efficiency Boost Ratios IOUT Up to 50mA 15µA VIN Quiescent Current 1µA VAUX Quiescent Current Stable with Ceramic Capacitors Short-Circuit/Thermal Protection Thermally Enhanced 10-Pin MSOP Package

High Power Synchronous Switching Regulator Controller Features: High Power Buck Converter from 5V or 3.3V Input Adjustable Current Limit in S0-8 with Topside FET RDS(ON) Sensing No External Sense Resistor Required Hiccup Mode Current Limit Protection Adjustable, Fixed 1.9V, 2.5V, 2.8V and 3.3V Output All N-Channel MOSFET Synchronous Driver Excellent Output Regulation: ±2% over Line, Load and Temperature Variations High Efficiency: Over 95% Possible Fast Transient Response Fixed 300kHz Frequency Operation Internal Soft-Start Circuit Quiescent Current: 1mA; 45µA in Shutdown

Dual Ideal Diode-OR and Single Hot Swap Controller with Current Monitor Features:Ideal Diode-OR and Inrush Current Control for Redundant SuppliesLow Loss Replacement for Power Schottky DiodesEnables Safe Board Insertion into a Live Backplane2.9V to 18V Operating RangeCurrent Monitor OutputControls N-Channel MOSFETsLimits Peak Fault Current in ≤ 1μsAdjustable Current Limit with FoldbackAdjustable Start-Up and Current Limit Fault Delay0.5μs Ideal Diode Turn-On and Turn-Off TimeSmooth Switchover without OscillationFault, Power Good and Diode Status OutputsLTC4236-1: Latch Off After FaultLTC4236-2: Automatic Retry After Fault28-Pin 4mm x 5mm QFN Package

Power Management IC Development Tools LTC3526LEDC-2 Demo Board: 2MHz, 0.7-3.3Vin and 1.8/3/3/5Vout

Single/Dual-Supply High-Voltage Isolated IGBT Gate Driver with Miller Clamp Features: 13 A short-circuit source current (0 Ω gate resistance) 14 A short-circuit sink current (0 Ω gate resistance) 4.61 A peak current (2 Ω gate resistance) Output power device resistance: <1 Ω Desaturation protection Isolated desaturation fault reporting Soft shutdown on fault Miller clamp output with gate sense input Isolated fault and ready functions Low propagation delay: 55 ns typical Minimum pulse width: 50 ns Operating temperature range: −40°C to +125°C Output voltage range to 30 V Input voltage range from 2.5 V to 6 V Output and input undervoltage lockout (UVLO) Creepage distance: 7.8 mm minimum 100 kV/μs common-mode transient immunity (CMTI) 20-year lifetime for 600 V rms or 1092 V dc working voltage Safety and regulatory approvals 5 kV ac for 1 minute per UL 1577 CSA Component Acceptance Notice 5A DIN VDE V 0884-11:2017-01 VIORM = 849 V peak (reinforced) Qualified for automotive applications

Active Bias Controller Features: Automatic Gate voltage adjustment (No Calibration required) Supply Voltage: 4V to 12V Digital Voltage: 3.3V to 5V Controls both Enhancement and Depletion type devices Adjustable Drain Current up to 200mA Sink/Source Gate Current Capability Optional Internal negative voltage generation that can be disabled to use external negative rail Fast Enable/Disable Trigger-out Output for Daisy Chain Power-Up and Power-Down Sequencing

1.4A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect Features: High Efficiency: Up to 93% Inrush Current Limiting and Output Disconnect Programmable Output Voltages up to 7.5V 1.5V to 6V Input Range Programmable/Synchronizable Fixed Frequency Operation up to 1.5MHz Programmable Automatic Burst Mode® Operation Current Mode Control with Programmable Soft-Start Period and Peak Current Limit 700mA at 7V from 5V Input 0.3Ω N-Channel and 0.4Ω P-Channel 1.4A Switches at 5VOUT Ultralow Quiescent Currents: 15µA Sleep, <1µA in Shutdown 3mm × 4mm Thermally Enhanced DFN Package