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

Constant Frequency Current Mode Step-Down DC/DC Controller in SOT-23 Features: High Efficiency: Up to 94% High Output Currents Easily Achieved Wide VIN Range: 2.5V to 9.8V Constant Frequency 550kHz Operation Burst Mode® Operation at Light Load Low Dropout: 100% Duty Cycle Tiny 6-Lead SOT-23 Package 0.8V Reference Allows Low Output Voltages Current Mode Operation for Excellent Line and Load Transient Response Low Quiescent Current: 270µA Shutdown Mode Draws Only 8µA Supply Current ±2.5% Reference Accuracy

Positive High Voltage Ideal Diode-OR with Input Supply and Fuse Monitors Features: Replaces Power Schottky Diodes Controls N-Channel MOSFETs 0.3μs Turn-Off Time Limits Peak Fault Current Wide Operating Voltage Range: 9V to 80V Smooth Switchover without Oscillation No Reverse DC Current Monitors VIN, Fuse, and MOSFET Diode Available in 14-Lead (4mm × 3mm) DFN, 16-Lead MS and SO Packages

6A DC/DC Module (Power Module) with PLL, Output Tracking and Margining Features: Complete Switch Mode Power Supply Wide Input Voltage Range: 4.5V to 20V 6A DC Typical, 8A Peak Output Current 0.6V to 5V Output Voltage Output Voltage Tracking and Margining Remote Sensing for Precision Regulation (LTM4603 Only) Typical Operating Frequency: 1MHz PLL Frequency Synchronization 1.5% Regulation Current Foldback Protection (Disabled at Start-Up) Pin Compatible with the LTM4601 Pb-Free (e4) RoHS Compliant Package with Gold Finish Pads Ultrafast Transient Response Current Mode Control Up to 93% Efficiency at 5VIN, 3.3VOUT Programmable Soft-Start Output Overvoltage Protection Small Footprint, Low Profile (15mm × 15mm × 2.8mm) Surface Mount LGA Package

200mA, 36V DC/DC Module (Power Module) Regulator Features: Complete Step-Down Switch Mode Power Supply Wide Input Voltage Range: 4V to 36V 1.25V to 5V Output Voltage EN55022 Class B Compliant 200mA Output Current Current Mode Control –55°C to 125°C Operating Temperature (LTM8020MPV) Pb-Free (e4) RoHS Compliant Package with Gold Pad Finish Tiny, Low Profile (6.25mm × 6.25mm × 2.32mm) Surface Mount LGA Package

High Efficiency Buck-Boost DC/DC Module (Power Module) Regulator Features: Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT Wide VIN Range: 4.5V to 20V Wide VOUT Range: 0.8V to 16V 5A DC Typical (12A DC Typical at Buck Mode) High Efficiency Up to 98% Current Mode Control Power Good Output Signal Phase-Lockable Fixed Frequency: 200kHz to 400kHz Ultrafast Transient Response Current Foldback Protection Output Overvoltage Protection Small, Low Profile Surface Mount LGA Package (15mm × 15mm × 2.8mm)

EN55022B Compliant 36VIN, 15VOUT, 5A, DC/DC Module (Power Module) Regulator Features: Complete Low EMI Switch Mode Power Supply EN55022 Class B Compliant Wide Input Voltage Range: 5V to 36V 3.3V to 15V Output Voltage Range 5A DC, 7A Peak Output Current Low Input and Output Referred Noise Output Voltage Tracking and Margining Power Good Tracks with Margining PLL Frequency Synchronization ±1.5% Set Point Accuracy Current Foldback Protection (Disabled at Start-Up) Parallel/Current Sharing Ultrafast Transient Response Current Mode Control Programmable Soft-Start Output Overvoltage Protection –55°C to 125°C Operating Temperature Range (LTM4612MPV) Small Surface Mount Footprint, Low Profile (15mm × 15mm × 2.8mm) LGA Package

Single Switch Synchronous Forward Controller Features: Synchronous Rectifier Control for High Efficiency Programmable Volt-Second Clamp Output Power Levels from 25W to 500W Low Current Start-Up (LT1952: 460µA; VIN On/Off = 14.25V/8.75V) (LT1952-1: 400µA; VIN On/Off = 7.75V/6.5V) True PWM Soft-Start Low Stress Short Circuit Protection Precision 107mV Current Limit Threshold Adjustable Delay for Synchronous Timing Accurate Shutdown Threshold with Programmable Hysteresis Programmable Slope Compensation Programmable Leading Edge Blanking Programmable Frequency (100kHz to 500kHz) Synchronizable to an External Clock up to 1.5 • fOSC Internal 1.23V Reference 2.5V External Reference Current Mode Control Small 16-Pin SSOP Package

Triple Buck Regulator with 1.2A and Two 600mA Outputs and Individual Programmable References Features:Three Independent Current Mode Buck DC/DC Regulators (1.2A and 2 × 600mA)Single Pin Programmable VFB Servo Voltages from 800mV Down to 425mV (in 25mV Steps)Pull VFB High to Make Each 600mA Buck a Slave for Higher Current OperationPulse-Skipping or Burst Mode® OperationProgrammable Switching Frequency (1MHz to 3MHz) or Fixed 2.25MHzSynchronizable (1.2MHz to 3MHz)VIN Range 2.5V to 5.5VAll Regulators Internally CompensatedPGOOD Output FlagQuiescent Current <100μA (All Regulators in Burst Mode Operation)Zero Shutdown CurrentOvertemperature and Short-Circuit ProtectionTiny 3mm × 3mm, 3mm × 4mm 20-Lead QFN and Thermally Enhanced TSSOP FE-16 Packages

1.5A, 15V Monolithic Synchronous Step-Down Regulator Features: 4V to 15V Operating Input Voltage Range 1.5A Output Current Up to 96% Efficiency Very Low Duty Cycle Operation: 5% at 2.25MHz Adjustable Switching Frequency: 800kHz to 4MHz External Frequency Synchronization Current Mode Operation for Excellent Line and Load Transient Response User Selectable Burst Mode® (No Load IQ = 300μA) or Forced Continuous Operation 0.6V Reference Allows Low Output Voltages Short-Circuit Protected Output Voltage Tracking Capability Programmable Soft-Start Power Good Status Output Available in Small, Thermally Enhanced, 16-Pin QFN (3mm × 3mm) and MSOP Packages