

Switching Regulators
Our high-efficiency DC-DC switching regulator ICs generate less heat, consume less current and require less board space than other solutions, enabling more robust operation and longer battery life. Switching regulator circuits use a power switch, an inductor, and a diode to transfer energy from input to output. The basic components of the switching circuit can be rearranged to form a step-down (buck) converter, a step-up (boost) converter, or an inverter (flyback). Feedback and control circuitry can be added to regulate the energy transfer and maintain a constant output. Our wide selection of DC-DC converters offer high switching frequencies, very efficient internal switching elements, wide input voltage ranges, and built-in circuit protection to support a broad range of applications.
Step-Down (Buck)
Step-Up (Boost)
Step-Up or Step-Down (Buck-Boost)
Inverting
Digital Power
Power Modules
Step-Down (Buck)
Step-Up (Boost)
Step-Up or Step-Down (Buck-Boost)
Inverting
Digital Power
Power Modules
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Latest Products
MAX25206 Versatile Automotive 60V/70V 2.2MHz Buck Controller with 7µA IQ and Optional Bypass Mode
- Meets Stringent OEM Module Power Consumption and Performance Specifications
- 7µA Quiescent Current in Skip Mode at VOUT = 3.3V
- ±1.5% Output-Voltage Accuracy: 5.0V/3.3V Fixed, or Adjustable Between 1V and 10V
- Enables Crank-Ready Designs
- Wide Input Supply Range from 3.5V to 42V
- EMI Reduction Features Reduce Interference with Sensitive Radio Bands without Sacrificing Wide Input Voltage Range
- 50ns (typ) Minimum On-Time Guarantees Skip-Free Operation for 3.3V Output from Car Battery at 2.2MHz
- Spread-Spectrum Option
- Frequency-Synchronization Input
- Resistor-Programmable Frequency Between 220kHz and 2.2MHz
- Integration and Thermally Enhanced Packages Save Board Space and Cost
- 2.2MHz Step-Down Controller
- 180° Out-of-Phase SYNCOUT Output for Synchronization
- Current-Mode Controller with Forced-Continuous and Skip Modes
- Thermally Enhanced 20-Pin Side-Wettable (SW) TQFN-EP Package
- Protection Features Improve System Reliability
- Supply Undervoltage Lockout
- Overtemperature and Short-Circuit Protection
- Output Overvoltage and Undervoltage Monitoring
- -40°C to +125°C Grade 1 Automotive Temperature Range
MAX17643 4.5V–60V, 2A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation
- Reduces External Components and Total Cost
- No Schottky-Synchronous Operation
- Internal Compensation for Any Output Voltage
- All-Ceramic Capacitors, Compact Layout
- Reduces Number of DC-DC Regulators to Stock
- Wide 4.5V to 60V Input
- Adjustable 0.9V to (0.9 × VIN) Output
- Up to 2A Peak-Load Current
- 400kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization
- Reduces Power Dissipation
- Peak Efficiency of 91.6%
- Auxiliary Bootstrap LDO for Improved Efficiency
- 4.65μA Shutdown Current
- Operates Reliably in Adverse Industrial Environments
- Hiccup-Mode Overload Protection
- Adjustable Soft-Start
- Built-In Output-Voltage Monitoring with Active-Low RESET
- Programmable EN/UVLO Threshold
- Monotonic Startup into Prebiased Load
- Overtemperature Protection
- Wide Industrial -40°C to +125°C Ambient Operating Temperature Range/ -40°C to +150°C Junction Temperature Range
- Complies with CISPR22 (EN55022) Class B Conducted and Radiated Emissions
MAX38650 Tiny 1.8V to 5.5V Input, 390nA IQ, 100mA nanoPower Buck Converter with 100% Duty Cycle Operation
- Extends Battery Life
- 390nA Ultra-Low Quiescent Supply Current
- 5nA Shutdown Current
- 95% Peak Efficiency and over 85% at 10μA
- Easy to Use—Addresses Popular Operation
- 1.8V to 5.5V Input Range
- Single Resistor-Adjustable VOUT from 1.2V to 3.3V (MAX38650A)
- Preprogrammed VOUT from 1.2V to 5V (MAX38650B) in steps of 50mV
- 100% Duty Cycle Mode for Low Dropout Operation
- ±1.5% Output Voltage Accuracy
- 100mA Load Current
- Protects System in Multiple Use Cases
- Reverse-Current Blocking in Shutdown
- Active Discharge Feature
- Reduces Size and Increases Reliability
- -40°C to +125°C Operating Temperature Range
- 1.58mm x 0.89mm, 0.4mm Pitch, 6-Pin (2 x 3) WLP

MAX20010E Automotive Single 6A Step-Down Converters
- Fully Integrated, Synchronous 6A DC-DC Converter Enables Small Solution Size
- 3.0V to 5.5V Operating Supply Voltage
- High-Precision Voltage Regulator for Applications Processors
- ±2% Output-Voltage Accuracy
- Differential Remote Voltage Sensing
- I2C-Controlled Output Voltage of 0.5V to 1.27V in 10mV Steps, or 0.625V to 1.5875V in 12.5mV Steps
- Excellent Load-Transient Performance
- Low-Noise Feature Reduces EMI
- 2.2MHz Operation
- Spread-Spectrum Option
- Frequency-Synchronization Input/Output
- Current-Mode, Forced-PWM, and Skip Operation
- Robust for the Automotive Environment
- PGOOD Output
- Overtemperature and Short-Circuit Protection
- 20-Pin (4mm × 4mm) TQFN with an Exposed Pad
- -40°C to +125°C Operating Temperature Range
- AEC-Q100 Qualified
MAX20057 36V Boost Controller with Dual 3.5A/2A Synchronous Buck Converters for Automotive Applications
- Meets Stringent OEM Module Power Consumption and Performance Specifications
- 10µA Supply Current with 5V Buck On
- 8µA Supply Current with 3.3V Buck On
- 30µA Supply Current with All Regulators On
- Enables Crank-Ready Designs
- Output Voltages in Regulation Through Cold CrankDown to 2V Battery Voltage
- Wide Input-Supply Range from 3.5V to 36V
- EMI Reduction Features Reduce Interference with Sensitive Radio Bands without Sacrificing Wide Input-Voltage Range
- 20ns (typ) Minimum On-Time Guarantees Skip-Free Operation for 3.3V Output at 2.1MHz
- Spread-Spectrum Option
- Phase-Locked Loop (PLL) Frequency Synchronization
- Integration and Thermally Enhanced Packages Save Board Space and Cost
- Two 2.1MHz Buck Converters with Asynchronous Boost Controller
- Current-Mode Controller with Forced Fixed-Frequency and Skip Modes
- Thermally Enhanced 5mm x 5mm, 28-Pin TQFN-EP Package
- Protection Features Improve System Reliability
- Supply Undervoltage Lockout
- Overtemperature and Short-Circuit Protection
MAX17291 High-Voltage, 1A Micropower Boost Converter with Short-Circuit Protection and True Shutdown
- 28μA Quiescent Supply Current from Input
- Output Short-Circuit Protection
- Overtemperature Protection
- Constant Frequency in CCM
- True Shutdown Mode
- 0.05μA Shutdown Current
- No Reverse Current from OUT
- 91% Peak Efficiency
- 1.8V to 5.5V Input Range
- 5.5V to 20V Output Voltage Range
- 1A Peak Inductor Current Limit
- Multiple Package Options
- 1.27mm x 0.87mm, 6-Bump (3 x 2), 0.4mm Pitch WLP
- 2mm x 2mm, 8-Pin TDFN
- -40°C to +125°C Operating Temperature Range
MAX20458 36V Boost Controller with 3.5A Synchronous Buck Converter For Automotive Applications
- Meets Stringent OEM Module Power Consumption and Performance Specifications
- 10μA Supply Current with 5V Buck On
- OUT Can Be Either 5V or 3.3V
- 30µA Supply Current with All Regulators On
- Enables Crank-Ready Designs
- Output Voltages in Regulation Through Cold Crank Down to 2V Battery Voltage
- Wide Input Supply Range from 3.5V to 36V
- EMI Reduction Features Reduce Interference with Sensitive Radio Bands without Sacrificing Wide Input Voltage Range
- 20ns (typ) Minimum On-Time Guarantees Skip-Free Operation for 3.3V Output at 2.1MHz
- Spread-Spectrum Option
- Phase-Locked Loop (PLL) Frequency Synchronization
- Integration and Thermally Enhanced Packages Save Board Space and Cost
- 2.1MHz Buck Converters with Asynchronous Boost Controller
- Current-Mode Controller with Forced Fixed Frequency and Skip Modes
- Thermally Enhanced 5mm x 5mm, 28-Pin TQFN-EP Package
- Protection Features Improve System Reliability
- Supply Undervoltage Lockout
- Overtemperature and Short-Circuit Protection
MAX77839 5.5V Input, 4.4A/3.6A Switching Current 6μA IQ Buck-Boost Converter
- Flexible System Integration
- 1.8V to 5.5V Input Voltage Range
- 2.3V to 5.3V Single Resistor Adjustable Output
- 3.6A ILIM ("C" and "D" options) or 4.4A ILIM ("A" and "B" options)
- 3A Maximum Output Current (4.4A ILIM, Buck Mode)
- 3A Maximum Output Current (4.4A ILIM, Boost Mode 3.0VIN, 3.3VOUT)
- 96% Peak Efficiency (VIN = 3.6V, VOUT = 3.3V)
- Optional GPIO Pin (FPWM input, Active-Low POK output)
- Low Supply Current that Extends Battery Life
- Skip Mode that Reduces Supply Current at Light Loads
- 6μA Ultra-Low IQ
- 2.2MHz (typ) Switching Frequency
- Integrated Protections that Provide System Robustness
- Undervoltage Lockout (UVLO)
- Overvoltage Protection (OVP)
- Cycle-by-Cycle Inductor Peak Current Limit
- Thermal Shutdown (TSHDN)
- Active Output Discharge
- Small Solution Size
- 2.07mm x 1.51mm, 0.4mm Pitch, 15-Bump WLP
- 2.5mm x 2.0mm, 0.5mm Pitch, 11-Pin FC2QFN
MAX16602 VR13.HC and AI Cores Dual-Output Voltage Regulator Chipset
- High Power Density and Efficiency
- Smart Power-Stage Support: MAX20778/A, MAX20779/A/B/C, MAX20780, MAX20790, MAX16604
- Top-Tier Efficiency (95.6% Peak Efficiency at 1.8VOUT)
- Integrated Input Power Monitor
- Telemetry Through PMBus
- Digitally Programmable Configuration
- Input Voltage, Current, and Power Monitoring
- Power-Stage Temperature Monitoring and Reporting
- Advanced Power Management
- Autonomous Phase-Shedding
- Orthogonal Current Rebalance for Phase-Current Balance During Transients
- Low-Quiescent Current—Improves Light-Load and Standby Efficiency
- Protection Features
- Input and Bias Supply Undervoltage Protection
- Overcurrent Protection
- Critical Fault-Flag Output Pin
MAX17552B 60V, 100mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter with 22μA No-Load Supply Current
- Eliminates External Components and Reduces Total Cost
- No Schottky—Synchronous Operation for High Efficiency and Reduced Cost
- Internal Compensation
- Fixed Internal 5.1ms or Programmable Soft-Start
- All-Ceramic Capacitors, Ultra-Compact Layout
- Reduces Number of DC-DC Regulators to Stock
- Wide 4V to 60V Input Voltage Range
- Adjustable 0.8V to 0.9 x VIN Output Voltages
- Delivers Up to 100mA Load Current
- 100kHz to 2.2MHz Adjustable Switching Frequency Range with External Clock Synchronization
- Configurable Between PFM and Forced-PWM Modes
- Reduces Power Dissipation
- 22µA No Load Supply Current
- Peak Efficiency > 90%
- PFM Feature for High Light-Load Efficiency
- 1.2µA (typ) Shutdown Current
- Operates Reliably in Adverse Industrial Environments
- Peak Current-Limit Protection
- Built-In Output-Voltage Monitoring with Open-Drain Active-Low RESET Pin
- Programmable EN/UVLO Threshold
- Monotonic Startup into Prebiased Output
- Overtemperature Protection
- High Industrial -40°C to +125°C Ambient Operating Temperature Range / -40°C to +150°C Junction Temperature Range
MAX25206 Versatile Automotive 60V/70V 2.2MHz Buck Controller with 7µA IQ and Optional Bypass Mode
- Meets Stringent OEM Module Power Consumption and Performance Specifications
- 7µA Quiescent Current in Skip Mode at VOUT = 3.3V
- ±1.5% Output-Voltage Accuracy: 5.0V/3.3V Fixed, or Adjustable Between 1V and 10V
- Enables Crank-Ready Designs
- Wide Input Supply Range from 3.5V to 42V
- EMI Reduction Features Reduce Interference with Sensitive Radio Bands without Sacrificing Wide Input Voltage Range
- 50ns (typ) Minimum On-Time Guarantees Skip-Free Operation for 3.3V Output from Car Battery at 2.2MHz
- Spread-Spectrum Option
- Frequency-Synchronization Input
- Resistor-Programmable Frequency Between 220kHz and 2.2MHz
- Integration and Thermally Enhanced Packages Save Board Space and Cost
- 2.2MHz Step-Down Controller
- 180° Out-of-Phase SYNCOUT Output for Synchronization
- Current-Mode Controller with Forced-Continuous and Skip Modes
- Thermally Enhanced 20-Pin Side-Wettable (SW) TQFN-EP Package
- Protection Features Improve System Reliability
- Supply Undervoltage Lockout
- Overtemperature and Short-Circuit Protection
- Output Overvoltage and Undervoltage Monitoring
- -40°C to +125°C Grade 1 Automotive Temperature Range
MAX17643 4.5V–60V, 2A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation
- Reduces External Components and Total Cost
- No Schottky-Synchronous Operation
- Internal Compensation for Any Output Voltage
- All-Ceramic Capacitors, Compact Layout
- Reduces Number of DC-DC Regulators to Stock
- Wide 4.5V to 60V Input
- Adjustable 0.9V to (0.9 × VIN) Output
- Up to 2A Peak-Load Current
- 400kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization
- Reduces Power Dissipation
- Peak Efficiency of 91.6%
- Auxiliary Bootstrap LDO for Improved Efficiency
- 4.65μA Shutdown Current
- Operates Reliably in Adverse Industrial Environments
- Hiccup-Mode Overload Protection
- Adjustable Soft-Start
- Built-In Output-Voltage Monitoring with Active-Low RESET
- Programmable EN/UVLO Threshold
- Monotonic Startup into Prebiased Load
- Overtemperature Protection
- Wide Industrial -40°C to +125°C Ambient Operating Temperature Range/ -40°C to +150°C Junction Temperature Range
- Complies with CISPR22 (EN55022) Class B Conducted and Radiated Emissions
MAX38650 Tiny 1.8V to 5.5V Input, 390nA IQ, 100mA nanoPower Buck Converter with 100% Duty Cycle Operation
- Extends Battery Life
- 390nA Ultra-Low Quiescent Supply Current
- 5nA Shutdown Current
- 95% Peak Efficiency and over 85% at 10μA
- Easy to Use—Addresses Popular Operation
- 1.8V to 5.5V Input Range
- Single Resistor-Adjustable VOUT from 1.2V to 3.3V (MAX38650A)
- Preprogrammed VOUT from 1.2V to 5V (MAX38650B) in steps of 50mV
- 100% Duty Cycle Mode for Low Dropout Operation
- ±1.5% Output Voltage Accuracy
- 100mA Load Current
- Protects System in Multiple Use Cases
- Reverse-Current Blocking in Shutdown
- Active Discharge Feature
- Reduces Size and Increases Reliability
- -40°C to +125°C Operating Temperature Range
- 1.58mm x 0.89mm, 0.4mm Pitch, 6-Pin (2 x 3) WLP

MAX20010E Automotive Single 6A Step-Down Converters
- Fully Integrated, Synchronous 6A DC-DC Converter Enables Small Solution Size
- 3.0V to 5.5V Operating Supply Voltage
- High-Precision Voltage Regulator for Applications Processors
- ±2% Output-Voltage Accuracy
- Differential Remote Voltage Sensing
- I2C-Controlled Output Voltage of 0.5V to 1.27V in 10mV Steps, or 0.625V to 1.5875V in 12.5mV Steps
- Excellent Load-Transient Performance
- Low-Noise Feature Reduces EMI
- 2.2MHz Operation
- Spread-Spectrum Option
- Frequency-Synchronization Input/Output
- Current-Mode, Forced-PWM, and Skip Operation
- Robust for the Automotive Environment
- PGOOD Output
- Overtemperature and Short-Circuit Protection
- 20-Pin (4mm × 4mm) TQFN with an Exposed Pad
- -40°C to +125°C Operating Temperature Range
- AEC-Q100 Qualified
MAX20057 36V Boost Controller with Dual 3.5A/2A Synchronous Buck Converters for Automotive Applications
- Meets Stringent OEM Module Power Consumption and Performance Specifications
- 10µA Supply Current with 5V Buck On
- 8µA Supply Current with 3.3V Buck On
- 30µA Supply Current with All Regulators On
- Enables Crank-Ready Designs
- Output Voltages in Regulation Through Cold CrankDown to 2V Battery Voltage
- Wide Input-Supply Range from 3.5V to 36V
- EMI Reduction Features Reduce Interference with Sensitive Radio Bands without Sacrificing Wide Input-Voltage Range
- 20ns (typ) Minimum On-Time Guarantees Skip-Free Operation for 3.3V Output at 2.1MHz
- Spread-Spectrum Option
- Phase-Locked Loop (PLL) Frequency Synchronization
- Integration and Thermally Enhanced Packages Save Board Space and Cost
- Two 2.1MHz Buck Converters with Asynchronous Boost Controller
- Current-Mode Controller with Forced Fixed-Frequency and Skip Modes
- Thermally Enhanced 5mm x 5mm, 28-Pin TQFN-EP Package
- Protection Features Improve System Reliability
- Supply Undervoltage Lockout
- Overtemperature and Short-Circuit Protection
MAX17291 High-Voltage, 1A Micropower Boost Converter with Short-Circuit Protection and True Shutdown
- 28μA Quiescent Supply Current from Input
- Output Short-Circuit Protection
- Overtemperature Protection
- Constant Frequency in CCM
- True Shutdown Mode
- 0.05μA Shutdown Current
- No Reverse Current from OUT
- 91% Peak Efficiency
- 1.8V to 5.5V Input Range
- 5.5V to 20V Output Voltage Range
- 1A Peak Inductor Current Limit
- Multiple Package Options
- 1.27mm x 0.87mm, 6-Bump (3 x 2), 0.4mm Pitch WLP
- 2mm x 2mm, 8-Pin TDFN
- -40°C to +125°C Operating Temperature Range
MAX20458 36V Boost Controller with 3.5A Synchronous Buck Converter For Automotive Applications
- Meets Stringent OEM Module Power Consumption and Performance Specifications
- 10μA Supply Current with 5V Buck On
- OUT Can Be Either 5V or 3.3V
- 30µA Supply Current with All Regulators On
- Enables Crank-Ready Designs
- Output Voltages in Regulation Through Cold Crank Down to 2V Battery Voltage
- Wide Input Supply Range from 3.5V to 36V
- EMI Reduction Features Reduce Interference with Sensitive Radio Bands without Sacrificing Wide Input Voltage Range
- 20ns (typ) Minimum On-Time Guarantees Skip-Free Operation for 3.3V Output at 2.1MHz
- Spread-Spectrum Option
- Phase-Locked Loop (PLL) Frequency Synchronization
- Integration and Thermally Enhanced Packages Save Board Space and Cost
- 2.1MHz Buck Converters with Asynchronous Boost Controller
- Current-Mode Controller with Forced Fixed Frequency and Skip Modes
- Thermally Enhanced 5mm x 5mm, 28-Pin TQFN-EP Package
- Protection Features Improve System Reliability
- Supply Undervoltage Lockout
- Overtemperature and Short-Circuit Protection
MAX77839 5.5V Input, 4.4A/3.6A Switching Current 6μA IQ Buck-Boost Converter
- Flexible System Integration
- 1.8V to 5.5V Input Voltage Range
- 2.3V to 5.3V Single Resistor Adjustable Output
- 3.6A ILIM ("C" and "D" options) or 4.4A ILIM ("A" and "B" options)
- 3A Maximum Output Current (4.4A ILIM, Buck Mode)
- 3A Maximum Output Current (4.4A ILIM, Boost Mode 3.0VIN, 3.3VOUT)
- 96% Peak Efficiency (VIN = 3.6V, VOUT = 3.3V)
- Optional GPIO Pin (FPWM input, Active-Low POK output)
- Low Supply Current that Extends Battery Life
- Skip Mode that Reduces Supply Current at Light Loads
- 6μA Ultra-Low IQ
- 2.2MHz (typ) Switching Frequency
- Integrated Protections that Provide System Robustness
- Undervoltage Lockout (UVLO)
- Overvoltage Protection (OVP)
- Cycle-by-Cycle Inductor Peak Current Limit
- Thermal Shutdown (TSHDN)
- Active Output Discharge
- Small Solution Size
- 2.07mm x 1.51mm, 0.4mm Pitch, 15-Bump WLP
- 2.5mm x 2.0mm, 0.5mm Pitch, 11-Pin FC2QFN
MAX16602 VR13.HC and AI Cores Dual-Output Voltage Regulator Chipset
- High Power Density and Efficiency
- Smart Power-Stage Support: MAX20778/A, MAX20779/A/B/C, MAX20780, MAX20790, MAX16604
- Top-Tier Efficiency (95.6% Peak Efficiency at 1.8VOUT)
- Integrated Input Power Monitor
- Telemetry Through PMBus
- Digitally Programmable Configuration
- Input Voltage, Current, and Power Monitoring
- Power-Stage Temperature Monitoring and Reporting
- Advanced Power Management
- Autonomous Phase-Shedding
- Orthogonal Current Rebalance for Phase-Current Balance During Transients
- Low-Quiescent Current—Improves Light-Load and Standby Efficiency
- Protection Features
- Input and Bias Supply Undervoltage Protection
- Overcurrent Protection
- Critical Fault-Flag Output Pin
MAX17552B 60V, 100mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter with 22μA No-Load Supply Current
- Eliminates External Components and Reduces Total Cost
- No Schottky—Synchronous Operation for High Efficiency and Reduced Cost
- Internal Compensation
- Fixed Internal 5.1ms or Programmable Soft-Start
- All-Ceramic Capacitors, Ultra-Compact Layout
- Reduces Number of DC-DC Regulators to Stock
- Wide 4V to 60V Input Voltage Range
- Adjustable 0.8V to 0.9 x VIN Output Voltages
- Delivers Up to 100mA Load Current
- 100kHz to 2.2MHz Adjustable Switching Frequency Range with External Clock Synchronization
- Configurable Between PFM and Forced-PWM Modes
- Reduces Power Dissipation
- 22µA No Load Supply Current
- Peak Efficiency > 90%
- PFM Feature for High Light-Load Efficiency
- 1.2µA (typ) Shutdown Current
- Operates Reliably in Adverse Industrial Environments
- Peak Current-Limit Protection
- Built-In Output-Voltage Monitoring with Open-Drain Active-Low RESET Pin
- Programmable EN/UVLO Threshold
- Monotonic Startup into Prebiased Output
- Overtemperature Protection
- High Industrial -40°C to +125°C Ambient Operating Temperature Range / -40°C to +150°C Junction Temperature Range