Adjustable Frequency Current Mode Flyback/Boost/SEPIC DC/DC Controller Features: VIN and VOUT Limited Only by External Components 4.5V Undervoltage Lockout Threshold Adjustable Slope Compensation Adjustable Overcurrent Protection with Automatic Restart Adjustable Operating Frequency (70kHz to 700kHz) With One External Resistor Synchronizable to an External Clock ±1.5% Reference Accuracy Only 100mV Current Sense Voltage Drop RUN Pin with Precision Threshold and Adjustable Hysteresis Programmable Soft-Start with One External Capacitor Low Quiescent Current: 360μA Small 10-Lead MSOP and 3mm × 3mm DFN

Low IQ Synchronous Boost Controller Features: Synchronous Operation For Highest Efficiency and Reduced Heat Dissipation Wide VIN Range: 4.5V to 38V (40V Abs Max) and Operates Down to 2.5V After Start-Up Output Voltages Up to 60V ±1% 1.2V Reference Voltage RSENSE or Inductor DCR Current Sensing 100% Duty Cycle Capability for Synchronous MOSFET Low Quiescent Current: 55μA Phase-Lockable Frequency (75kHz to 850kHz) Programmable Fixed Frequency (50kHz to 900kHz) Adjustable Output Voltage Soft-Start Power Good Output Voltage Monitor Low Shutdown Current IQ: <8μA Internal 5.4V LDO for Gate Drive Supply Thermally Enhanced 16-Pin 3mm × 3mm QFN and MSOP Packages AEC-Q100 Qualified for Automotive Applications

20V High Efficiency Nanopower Step-Down Regulator Features: 720nA Input IQ in Regulation (No Load), VIN = 4V 820nA Input IQ in Regulation (No Load), VIN = 20V 400nA Input IQ in UVLO 2.7V to 20V Input Operating Range Up to 50mA of Output Current Pin Selectable Output Voltages: 1.2V, 1.5V, 1.8V, 2.5V (LTC3388-1) 2.8V, 3.0V, 3.3V, 5.0V (LTC3388-3) High Efficiency Hysteretic Synchronous DC/DC Conversion Standby Mode Disables Buck Switching Available in 10-Lead MSE and 3mm × 3mm DFN Packages

Dual Monolithic Buck Regulator with Power-On Reset and Watchdog Timer Features: High Voltage Buck Regulator: 4V to 42V Operating Range 1.3A Output Current Input Transient Protection to 55V Low Voltage Synchronous Buck Regulator: 2.5V to 5.5V Input Voltage Range 1.1A Output Current Synchronizable, Adjustable 350kHz to 2.5MHz Switching Frequency Programmable Power-On Reset Timer Programmable Window Mode Watchdog Timer Typical Quiescent Current: 290μA Short-Circuit Robust Programmable Soft-Start Low Shutdown Current: IQ < 1μA Thermal Shutdown Available in Thermally Enhanced 28-Lead (4mm × 5mm) QFN and 28-Lead TSSOP Packages

Dual, 2-Phase Synchronous Step-Down DC/DC Controllers Features: Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise Accurate Multiphase Current Matching RSENSE or DCR Current Sensing ±0.75% 0.6V Output Voltage Accuracy Phase-Lockable Fixed Frequency 250kHz to 780kHz High Efficiency: Up to 95% Dual N-channel MOSFET Synchronous Drive Wide VIN Range: 4V to 38V (40V Max) Operation Wide VOUT Range: 0.6V to 12.5V Operation Adjustable Soft-Start Current Ramping or Tracking Foldback Output Current Limiting Output Overvoltage Protection Power Good Output Voltage Monitor 5V Low Dropout Regulator Small 28-Lead QFN and Narrow SSOP Packages

Dual, 2-Phase Synchronous Step-Down DC/DC Controllers Features: Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise Accurate Multiphase Current Matching RSENSE or DCR Current Sensing ±0.75% 0.6V Output Voltage Accuracy Phase-Lockable Fixed Frequency 250kHz to 780kHz High Efficiency: Up to 95% Dual N-channel MOSFET Synchronous Drive Wide VIN Range: 4V to 38V (40V Max) Operation Wide VOUT Range: 0.6V to 12.5V Operation Adjustable Soft-Start Current Ramping or Tracking Foldback Output Current Limiting Output Overvoltage Protection Power Good Output Voltage Monitor 5V Low Dropout Regulator Small 28-Lead QFN and Narrow SSOP Packages

Dual, 2-Phase Synchronous Step-Down DC/DC Controllers Features: Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise Accurate Multiphase Current Matching RSENSE or DCR Current Sensing ±0.75% 0.6V Output Voltage Accuracy Phase-Lockable Fixed Frequency 250kHz to 780kHz High Efficiency: Up to 95% Dual N-channel MOSFET Synchronous Drive Wide VIN Range: 4V to 38V (40V Max) Operation Wide VOUT Range: 0.6V to 12.5V Operation Adjustable Soft-Start Current Ramping or Tracking Foldback Output Current Limiting Output Overvoltage Protection Power Good Output Voltage Monitor 5V Low Dropout Regulator Small 28-Lead QFN and Narrow SSOP Packages

40VIN, 3.5A/6A Step-Down Silent Switcher Module Regulator Features: Complete Step-Down Switch Mode Power Supply Low Noise Silent Switcher® Architecture Wide Input Voltage Range: 3.4V to 40V Wide Output Voltage Range: 0.97V to 15V 3.5A Continuous Output Current at 12VIN, 5VOUT, TA = 85°C 6A Peak Output Current Parallelable for Increased Output Current Selectable Switching Frequency: 200kHz to 3MHz Tiny, Low Profile 6.25mm × 9mm × 3.32mm RoHS Compliant BGA Package

Dual Output PolyPhase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management Features: PMBus/I2C Compliant Serial Interface Monitor Voltage, Current, Temperature and Faults Digitally Programmable Voltage, Current Limit, Soft-Start/Stop, Sequencing, Margining, AVP and UV/OV Thresholds 3V ≤ VINSNS ≤ 38V, 0.5V ≤ VOUT ≤ 5.25V ±0.5% Output Voltage Accuracy Programmable PWM Frequency or External Clock Synchronization from 250kHz to 1.25MHz Accurate PolyPhase® Current Sharing Internal EEPROM with Fault Logging and ECC IC Supply Range: 3V to 13.2V Resistor or Inductor DCR Current Sensing Optional Resistor Programming for Key Parameters 40-Pin (6mm × 6mm) QFN Package AEC-Q100 Qualified for Automotive Applications

36VIN, 5.4A Buck-Boost Module Regulator Features: Complete Buck-Boost Switch Mode Power Supply Wide Input Voltage Range: 5V to 36V Wide Output Voltage Range: 1.2V to 36V VIN May Be Greater than, Equal to or Less than VOUT 12V/1.8A Output from 6VIN 12V/3.4A Output from 12VIN 12V/5.4A Output from 24VIN Up to 94% Efficient Adjustable Input and Output Average Current Limits Input and Output Current Monitors Parallelable for Increased Output Current Selectable Switching Frequency: 100kHz to 800kHz Synchronization from 200kHz to 700kHz 11.25mm × 15mm × 3.42mm BGA Package