65V, 3.5A Synchronous Step-Down Silent Switcher with 2.5A Quiescent Current Features: Silent Switcher® Architecture Ultralow EMI Emissions Spread Spectrum Frequency Modulation High Efficiency at High Frequency Up to 95% Efficiency at 1MHz, 12VIN to 5VOUT Up to 94% Efficiency at 2MHz, 12VIN to 5VOUT Wide Input Voltage Range: 3V to 65V 3.5A Maximum Continuous Output, 5A Peak Transient Output Fast Minimum Switch-On Time: 35ns Ultralow Quiescent Current Burst Mode® Operation 2.5μA IQ Regulating 12VIN to 3.3VOUT Output Ripple < 10mVP-P Low Dropout Under All Conditions: 130mV at 1A Safely Tolerates Inductor Saturation in Overload Adjustable and Synchronizable: 200kHz to 3MHz Peak Current Mode Operation Output Soft-Start and Tracking Small 18-Lead 3mm × 4mm QFN AEC-Q100 Qualified for Automotive Applications

18V, 10A SynchronousStep-Down Silent Switcher 2 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 High Efficiency at High Frequency Up to 96% Efficiency at 1MHz, 12VIN to 3.3VOUT Up to 95% Efficiency at 2MHz, 12VIN to 3.3VOUT Wide Input Voltage Range: 2.8V to 18V 10A Output Current External Compensation: Fast Transient Response and Current Sharing Low Quiescent Current Burst Mode® Operation 240µA IQ Regulating 12VIN to 1.2VOUT Output Ripple < 10mVP-P Fast Minimum Switch On-Time: 25ns Low Dropout Under All Conditions: 50mV at 1A Forced Continuous Mode Adjustable and Synchronizable: 200kHz to 3MHz Output Soft-Start and Power Good Small 24-Lead 4mm × 4mm LQFN Package

18V, 10A SynchronousStep-Down Silent Switcher 2 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 High Efficiency at High Frequency Up to 96% Efficiency at 1MHz, 12VIN to 3.3VOUT Up to 95% Efficiency at 2MHz, 12VIN to 3.3VOUT Wide Input Voltage Range: 2.8V to 18V 10A Output Current External Compensation: Fast Transient Response and Current Sharing Low Quiescent Current Burst Mode® Operation 240µA IQ Regulating 12VIN to 1.2VOUT Output Ripple < 10mVP-P Fast Minimum Switch On-Time: 25ns Low Dropout Under All Conditions: 50mV at 1A Forced Continuous Mode Adjustable and Synchronizable: 200kHz to 3MHz Output Soft-Start and Power Good Small 24-Lead 4mm × 4mm LQFN Package

42V, 6A Synchronous Step-Down Silent Switcher 2 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 High Efficiency at High Frequency Up to 96% Efficiency at 1MHz, 12VIN to 5VOUT Up to 95% Efficiency at 2MHz, 12VIN to 5VOUT Wide Input Voltage Range: 3.4V to 42V 6A Maximum Continuous, 7A Peak Output Ultralow Quiescent Current Burst Mode® Operation 2.5μA IQ Regulating 12VIN to 3.3VOUT (LT8640S) Output Ripple < 10mVP-P External Compensation: Fast Transient Response and Current Sharing (LT8643S) Fast Minimum Switch On-Time: 30ns Low Dropout Under All Conditions: 100mV at 1A Forced Continuous Mode Adjustable and Synchronizable: 200kHz to 3MHz Output Soft-Start and Tracking Small 24-Lead 4mm × 4mm LQFN Package AEC-Q100 Qualified for Automotive Applications

8V, 16A Synchronous Step-Down Silent Switcher 2 Features: Silent Switcher®2 Architecture Ultralow EMI Emissions on Any PCB Internal Bypass Capacitors Reduce Radiated EMI Optional Spread Spectrum Modulation High Efficiency at High Frequency Up to 94% Efficiency at 2MHz, 3.3VIN to 1.2VOUT Up to 93% Efficiency at 2MHz, 5VIN to 1.2VOUT PVIN Range: 1.5V to 8V, SVIN Range: 2.7V to 8V VOUT Range: 0.6V to VIN Reference Accuracy: ±0.8% Over Temperature PolyPhase® Operation: Up to 12 Phases Fast Transient Response with External Compensation Forced Continuous Mode Operation Low Quiescent Current Burst Mode® Operation 180μA IQ Regulating 5VIN to 1.2VOUT Output Ripple < 10mVP-P Fast Minimum Switch On-Time: 20ns Adjustable and Synchronizable: 300kHz to 3.5MHz Output Soft-Start and Power Good Small 24-Lead 4mm × 4mm LQFN Package AEC-Q100 Qualified for Automotive Applications

8V, 16A Synchronous Step-Down Silent Switcher 2 Features: Silent Switcher®2 Architecture Ultralow EMI Emissions on Any PCB Internal Bypass Capacitors Reduce Radiated EMI Optional Spread Spectrum Modulation High Efficiency at High Frequency Up to 94% Efficiency at 2MHz, 3.3VIN to 1.2VOUT Up to 93% Efficiency at 2MHz, 5VIN to 1.2VOUT PVIN Range: 1.5V to 8V, SVIN Range: 2.7V to 8V VOUT Range: 0.6V to VIN Reference Accuracy: ±0.8% Over Temperature PolyPhase® Operation: Up to 12 Phases Fast Transient Response with External Compensation Forced Continuous Mode Operation Low Quiescent Current Burst Mode® Operation 180μA IQ Regulating 5VIN to 1.2VOUT Output Ripple < 10mVP-P Fast Minimum Switch On-Time: 20ns Adjustable and Synchronizable: 300kHz to 3.5MHz Output Soft-Start and Power Good Small 24-Lead 4mm × 4mm LQFN Package AEC-Q100 Qualified for Automotive Applications

65V, 8A Synchronous Step-Down Silent Switcher with 2.5A Quiescent Current Features: Silent Switcher® Architecture Ultralow EMI Emissions Optional Spread Spectrum Modulation Up to 95% Efficiency at 1MHz, 12VIN to 5VOUT Up to 94% Efficiency at 2MHz, 12VIN to 5VOUT Wide Input Voltage Range: 3.4V to 65V Ultralow Quiescent Current Burst Mode Operation 2.5μA IQ Regulating 12VIN to 3.3VOUT Output Ripple < 10mVP-P Fast Minimum Switch On-Time: 40ns Low Dropout Under All Conditions: 60mV at 1A Adjustable and Synchronizable: 200kHz to 2.2MHz Peak Current Mode Operation Output Soft-Start and Tracking Small 32-Lead 6mm × 4mm LQFN Package AEC-Q100 Qualification In Progress

Dual Channel 4A, 42V, Synchronous Step-Down Silent Switcher 2 with 6.2A Quiescent Current Features: Silent Switcher®2 Architecture: Ultralow EMI on Any PCB Eliminates PCB Layout Sensitivity Internal Bypass Capacitors Reduce Radiated EMI Optional Spread Spectrum Modulation 4A DC from Each Channel Simultaneously Up to 6A on Either Channel Ultralow Quiescent Current Burst Mode® Operation: 6.2μA IQ Regulating 12VIN to 5VOUT1 and 3.3VOUT2 Output Ripple <10mVP-P Forced Continuous Mode Optional External VC Pin: Fast Transient Response and Current Sharing (Extra 50µA IQ/Channel) High Efficiency at High Frequency 94.6% Efficiency at 2A, 5VOUT from 12VIN at 2MHz 93.3% Efficiency at 4A, 5VOUT from 12VIN at 2MHz Fast Minimum Switch-On Time: 40ns Wide Input Voltage Range: 3.0V to 42V Adjustable and Synchronizable: 300kHz to 3MHz Small 4mm × 6mm 32-Pin LQFN Package AEC-Q100 Qualified for Automotive Applications

Dual Channel 4A, 42V, Synchronous Step-Down Silent Switcher 2 with 6.2A Quiescent Current Features: Silent Switcher®2 Architecture: Ultralow EMI on Any PCB Eliminates PCB Layout Sensitivity Internal Bypass Capacitors Reduce Radiated EMI Optional Spread Spectrum Modulation 4A DC from Each Channel Simultaneously Up to 6A on Either Channel Ultralow Quiescent Current Burst Mode® Operation: 6.2μA IQ Regulating 12VIN to 5VOUT1 and 3.3VOUT2 Output Ripple <10mVP-P Forced Continuous Mode Optional External VC Pin: Fast Transient Response and Current Sharing (Extra 50µA IQ/Channel) High Efficiency at High Frequency 94.6% Efficiency at 2A, 5VOUT from 12VIN at 2MHz 93.3% Efficiency at 4A, 5VOUT from 12VIN at 2MHz Fast Minimum Switch-On Time: 40ns Wide Input Voltage Range: 3.0V to 42V Adjustable and Synchronizable: 300kHz to 3MHz Small 4mm × 6mm 32-Pin LQFN Package AEC-Q100 Qualified for Automotive Applications

Dual Channel 8.5A, 18V, Synchronous Step-Down Silent Switcher with 16A Quiescent Current Features: Silent Switcher®2 Architecture: Ultralow EMI on Any PCB Eliminates PCB Layout Sensitivity Internal Bypass Capacitors Reduce Radiated EMI Spread Spectrum Frequency Modulation 8.5A DC from Each Channel Simultaneously Up to 12A on Either Channel Ultralow Quiescent Current Burst Mode® Operation: 16µA IQ Regulating 12VIN to 3.3VOUT (Both Channels) Output Ripple <10mVP-P ±1.2% 600mV Feedback Voltage with Remote Sense Output Current Monitor Pins with Current Limiting Forced Continuous Mode CLKOUT for Up to 4-Phase Operation 93.6% Efficiency at 6A, 3.3VOUT from 12VIN at 1MHz 85.6% Efficiency at 6A, 1.0VOUT from 12VIN at 1MHz Fast Minimum Switch-On Time: 20ns Adjustable and Synchronizable: 300kHz to 3MHz Small 4mm × 7mm 36-Pin LQFN Package AEC-Q100 Qualification for Automotive Applications

Dual Channel 8.5A, 18V, Synchronous Step-Down Silent Switcher with 16A Quiescent Current Features: Silent Switcher®2 Architecture: Ultralow EMI on Any PCB Eliminates PCB Layout Sensitivity Internal Bypass Capacitors Reduce Radiated EMI Spread Spectrum Frequency Modulation 8.5A DC from Each Channel Simultaneously Up to 12A on Either Channel Ultralow Quiescent Current Burst Mode® Operation: 16µA IQ Regulating 12VIN to 3.3VOUT (Both Channels) Output Ripple <10mVP-P ±1.2% 600mV Feedback Voltage with Remote Sense Output Current Monitor Pins with Current Limiting Forced Continuous Mode CLKOUT for Up to 4-Phase Operation 93.6% Efficiency at 6A, 3.3VOUT from 12VIN at 1MHz 85.6% Efficiency at 6A, 1.0VOUT from 12VIN at 1MHz Fast Minimum Switch-On Time: 20ns Adjustable and Synchronizable: 300kHz to 3MHz Small 4mm × 7mm 36-Pin LQFN Package AEC-Q100 Qualification for Automotive Applications

Dual Channel 2A, 42V,Synchronous Step-Down Silent Switcher 2with 6.2A Quiescent Current Features: Silent Switcher®2 Architecture: Ultralow EMI on Any PCB Eliminates PCB Layout Sensitivity Internal Bypass Capacitors Reduce Radiated EMI Optional Spread Spectrum Modulation 2A DC from Each Channel Simultaneously Up to 3A on Either Channel Ultralow Quiescent Current Burst Mode® Operation: 6.2μA IQ Regulating 12VIN to 5VOUT1 and 3.3VOUT2 Output Ripple < 10mVP–P Optional External VC Pin: Fast Transient Response Forced Continuous Mode High Efficiency at High Frequency 94.1% Efficiency at 1A, 5VOUT from 12VIN at 2MHz Pin-Selectable Fixed Output Voltages: 5V, 3.3V, 1.8V Fast Minimum Switch-On Time: 30ns Wide Input Voltage Range: 3.0V to 42V Adjustable and Synchronizable: 300kHz to 3MHz Fixed Output Pin Strap Options Internal 2MHz fSW with Fast Internal Compensation Small 4mm × 3mm 20-Pin LQFN Package AEC-Q100 Qualified for Automotive Applications

Active Rectifier Controller with Reverse Protection Features: AEC-Q100 Qualified for Automotive Applications Reverse Input Protection to –40V Improved Performance Compared to a Schottky Diode Reduce Power Dissipation by >90% Reduce Drop to 20mV Ultrafast Transient Response Rectifies 6VP-P Up to 50kHz Rectifies 2VP-P Up to 100kHz Wide Operating Voltage Range: 3V to 42V Low 20µA Quiescent Current in Operation Low 3.5µA Shutdown Current Accurate 1.21V Enable Pin Threshold Small 10-Lead MSOP Package, 10-Lead 3mm × 2mm DFN Package and 3mm × 2mm Side-Wettable DFN Package

Active Rectifier Controller with Reverse Protection Features: AEC-Q100 Qualified for Automotive Applications Reverse Input Protection to –40V Improved Performance Compared to a Schottky Diode Reduce Power Dissipation by >90% Reduce Drop to 20mV Ultrafast Transient Response Rectifies 6VP-P Up to 50kHz Rectifies 2VP-P Up to 100kHz Wide Operating Voltage Range: 3V to 42V Low 20µA Quiescent Current in Operation Low 3.5µA Shutdown Current Accurate 1.21V Enable Pin Threshold Small 10-Lead MSOP Package, 10-Lead 3mm × 2mm DFN Package and 3mm × 2mm Side-Wettable DFN Package

Active Rectifier Controller with Reverse Protection Features: AEC-Q100 Qualified for Automotive Applications Reverse Input Protection to –40V Improved Performance Compared to a Schottky Diode Reduce Power Dissipation by >90% Reduce Drop to 20mV Ultrafast Transient Response Rectifies 6VP-P Up to 50kHz Rectifies 2VP-P Up to 100kHz Wide Operating Voltage Range: 3V to 42V Low 20µA Quiescent Current in Operation Low 3.5µA Shutdown Current Accurate 1.21V Enable Pin Threshold Small 10-Lead MSOP Package, 10-Lead 3mm × 2mm DFN Package and 3mm × 2mm Side-Wettable DFN Package

Active Rectifier Controller with Reverse Protection Features: AEC-Q100 Qualified for Automotive Applications Reverse Input Protection to –40V Improved Performance Compared to a Schottky Diode Reduce Power Dissipation by >90% Reduce Drop to 20mV Ultrafast Transient Response Rectifies 6VP-P Up to 50kHz Rectifies 2VP-P Up to 100kHz Wide Operating Voltage Range: 3V to 42V Low 20µA Quiescent Current in Operation Low 3.5µA Shutdown Current Accurate 1.21V Enable Pin Threshold Small 10-Lead MSOP Package, 10-Lead 3mm × 2mm DFN Package and 3mm × 2mm Side-Wettable DFN Package

Active Rectifier Controller with Reverse Protection Features: AEC-Q100 Qualified for Automotive Applications Reverse Input Protection to –40V Improved Performance Compared to a Schottky Diode Reduce Power Dissipation by >90% Reduce Drop to 20mV Ultrafast Transient Response Rectifies 6VP-P Up to 50kHz Rectifies 2VP-P Up to 100kHz Wide Operating Voltage Range: 3V to 42V Low 20µA Quiescent Current in Operation Low 3.5µA Shutdown Current Accurate 1.21V Enable Pin Threshold Small 10-Lead MSOP Package, 10-Lead 3mm × 2mm DFN Package and 3mm × 2mm Side-Wettable DFN Package

42V Quad, Gangable, Synchronous, Monolithic Step-Down Regulator Features:Silent Switcher2 ArchitectureUltralow EMI EmissionsOptional Spread Spectrum ModulationTwo High Voltage Synchronous Buck Regulators3V to 42V Input Voltage RangeOutput Currents Up to 2.5A per ChannelChannels May Be Connected in Parallel Using a Single InductorTwo Low Voltage Synchronous Buck Regulators3V to 8V Input Voltage RangeOutput Currents Up to 4A per ChannelChannels May Be Connected in Parallel Using a Single Inductor12A IQ All Channels Active and No-LoadFlexible Supply Sequencing and ControlAdjustable and Synchronizable: 350kHz to 3MHzAvailable in 36-Lead LQFN (5mm 6mm)AEC-Q100 Qualified for Automotive Applications

42V/2A + 3 8V/1A, 2MHz Quad Monolithic Synchronous Step-Down Regulator Features: Flexible Power Supply System Providing Four Outputs with a Wide Input Range One High Voltage Synchronous Buck Regulator 3V to 42V Input Voltage Range Continuous Output Current Up to 2A High Efficiency Up to 93% Three Low Voltage Synchronous Buck Regulators 1.2V to 8V Input Voltage Range Continuous Output Currents Up to 1A High Efficiency Up to 95% Silent Switcher® Architecture Ultralow EMI/EMC Emissions Spread Spectrum Frequency Modulation Ultralow Quiescent Current Burst Mode® Operation 9.6μA IQ Regulating 12VIN1 to 5V/3.3V/1.8V/1.2VOUT1-4 Output Ripple <10mVPK-PK External Synchronization Capability Forced Continuous Mode Capability Small Thermally Enhanced 4mm × 3mm 20-Lead LQFN Package AEC-Q100 Qualified for Automotive Applications

80V VIN and VOUT Synchronous 4-Switch Buck-Boost DC/DC Controller Features:Single Inductor Allows VIN Above, Below, or Equal to Regulated VOUTVIN Range 2.8V (Need EXTVCC > 6.4V) to 80VVOUT Range: 1.3V to 80VQuad N-Channel MOSFET Gate DriversSynchronous Rectification: Up to 98% EfficiencyInput and Output Current Monitor PinsSynchronizable Fixed Frequency: 100kHz to 400kHzIntegrated Input Current, Input Voltage, Output Current and Output Voltage Feedback LoopsImproved Light Load Transition from DCM to FCMImproved IMON_OUT, IMON_IN Offset When ColdClock Output Usable To Monitor Die Temperature