Dual 60V Monolithic 1A Step-Down Switching Regulator Features: Wide Input Range: Operation from 4.1V to 60V Overvoltage Lockout Protects Circuit Through 80V Transients Two 1A Output Switching Regulators with Internal Power Switches Short Circuit Robust Adjustable 250kHz to 2.5MHz Switching Frequency, Synchronizable Over the Full Range Integrated Boost Diodes Integrated Loop Compensation Anti-Phase Switching Reduces Ripple Low Shutdown IQ (<2μA) Uses Small Inductors and Ceramic Capacitors Thermally Enhanced, 16-Lead MSOP Package

62V, 350mA Step-Down Regulator with 2.5A Quiescent Current and Integrated Diodes Features: Low Ripple Burst Mode® Operation 2.5μA IQ at 12VIN to 3.3VOUT Output Ripple < 5mVP-P Wide Input Voltage Range: 4.2V to 62V Operating Adjustable Switching Frequency: 200kHz to 2.2MHz Integrated Boost and Catch Diodes 350mA Output Current Fixed Output Voltages: 3.3V, 5V 2μA IQ at 12VIN Accurate Programmable Undervoltage Lockout FMEA Fault Tolerant (MSOP Package) Output Stays at or Below Regulation Voltage During Adjacent Pin Short or When a Pin is Left Floating Low Shutdown Current: IQ = 0.7μA Internal Sense Limits Catch Diode Current Power Good Flag Small, Thermally Enhanced 16-Pin MSOP and (3mm × 3mm) DFN Packages

55V, 1.2A 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 12VINLow Ripple Burst Mode® Operation: Output Ripple < 15mVP-PWide Input Voltage Range: 4.3V to 55V1.2A 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 CapabilityVInternal CompensationSaturating Switch Design: 0.44Ω On-ResistanceOutput Voltage: 1.19V to 30VSmall Thermally Enhanced 10-Pin MSOP Package and (3mm × 3mm) DFN Packages

Monolithic Dual Tracking 3A Step-Down Switching Regulator Features: Wide Input Range: – Operation from 3V to 60V Independent Supply, Shutdown, Soft-Start, UVLO, Programmable Current Limit and Programmable Power Good for Each 3A Regulator Die Temperature Monitor Adjustable/Synchronizable Fixed Frequency Operation from 250kHz to 2MHz with Synchronized Clock Output Independent Synchronized Switching Frequencies Optimize Component Size Antiphase Switching Outputs Can Be Paralleled Flexible Output Voltage Tracking Low Dropout: 95% Maximum Duty Cycle 5mm × 5mm QFN Package FMEA Compliant 38-Pin Exposed Pad TSSOP Package

Monolithic Dual Tracking 3A Step-Down Switching Regulator Features: Wide Input Range: – Operation from 3V to 60V Independent Supply, Shutdown, Soft-Start, UVLO, Programmable Current Limit and Programmable Power Good for Each 3A Regulator Die Temperature Monitor Adjustable/Synchronizable Fixed Frequency Operation from 250kHz to 2MHz with Synchronized Clock Output Independent Synchronized Switching Frequencies Optimize Component Size Antiphase Switching Outputs Can Be Paralleled Flexible Output Voltage Tracking Low Dropout: 95% Maximum Duty Cycle 5mm × 5mm QFN Package FMEA Compliant 38-Pin Exposed Pad TSSOP Package

36V 500mA Step-Down Regulator and 200mA LDO Features: Wide Input Range: Operation from 3.6V to 36V Overvoltage Lockout Protects Circuit Through 55V Transients on Input 500mA Output Current Switching Regulator High Switching Frequency: 750kHz 200mA Low Dropout Linear Regulator 1.2V to 16V Input; 0.8V to 8V Output 310mV Dropout Voltage VCC2 to OUT2 Precision Programmable Undervoltage Lockout Short-Circuit Robust Internal Soft-Start <2μA Shutdown Current Small Thermally Enhanced 16-Lead (3mm × 3mm) QFN and 12-Lead MSE Packages

1.2A Step-Down Switching Regulator with Output Current Limit Features: Wide Input Range: Operation from 7.5V to 36V Overvoltage Lockout Protects Circuit through 60V Transients Programmable Output Current Limit (0.4A to 1.2A) 3.3V and 5V Fixed Output Voltage Options Integrated Boost Diode Fixed Frequency, Peak Current Mode Control LT3663 fSW = 1.5MHz LT3663-X fSW = 1MHZ Low Switch VCESAT: 275mV at 1A Internally Compensated Thermal Protection Thermally Enhanced 8-Pin 2mm × 3mm DFN and

1.2A Step-Down Switching Regulator with Output Current Limit Features: Wide Input Range: Operation from 7.5V to 36V Overvoltage Lockout Protects Circuit through 60V Transients Programmable Output Current Limit (0.4A to 1.2A) 3.3V and 5V Fixed Output Voltage Options Integrated Boost Diode Fixed Frequency, Peak Current Mode Control LT3663 fSW = 1.5MHz LT3663-X fSW = 1MHZ Low Switch VCESAT: 275mV at 1A Internally Compensated Thermal Protection Thermally Enhanced 8-Pin 2mm × 3mm DFN and

40V 400mA Step-Down Switching Regulator with Dual Fault Protected Tracking LDOs Features: Dual Low Dropout Linear Tracking Regulators 200mA Outputs with Programmable Current Limits 1.6V to 45V Input Range Fault Protected to ±45V Triple Output Supply from a Single Input Requires Only One Inductor IQ = 50μA at 12VIN to 6V and 5V with No Load Buck Regulator: Low Ripple (<15mVP-P) Burst Mode® Operation 400mA Output with Internal Power Switch 4.3V to 40V Input Operation Range (60V Max) Adjustable 250kHz to 2.2MHz Switching Frequency Power Good Indicator Available in a Thermally-Enhanced 16-Lead MSOP Package

40V 400mA Step-Down Switching Regulator with Dual Fault Protected Tracking LDOs Features: Dual Low Dropout Linear Tracking Regulators 200mA Outputs with Programmable Current Limits 1.6V to 45V Input Range Fault Protected to ±45V Triple Output Supply from a Single Input Requires Only One Inductor IQ = 50μA at 12VIN to 6V and 5V with No Load Buck Regulator: Low Ripple (<15mVP-P) Burst Mode® Operation 400mA Output with Internal Power Switch 4.3V to 40V Input Operation Range (60V Max) Adjustable 250kHz to 2.2MHz Switching Frequency Power Good Indicator Available in a Thermally-Enhanced 16-Lead MSOP Package