Power supply ICs

Easy and cost-effective managing of power – reduce the component count and board space – high performance at an optimized system cost

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What are power supply ICs?

Power supply ICs (integrated circuits) regulate and convert electrical power across a broad range of end markets, including automotive, industrial, IoT, consumer, and medical applications.

Infineon's OPTIREG™ family covers the full spectrum of power supply IC types:

  • Linear voltage regulators (LDOs): stable, low-noise output for circuits where minimal ripple is critical
  • Switching regulators (DC-DC converters): step-down (buck), step-up (boost), and buck-boost topologies for high-efficiency power conversion
  • Power management ICs (PMICs): multi-rail integration that reduces component count and board space
  • System basis chips (SBCs): voltage supplies combined with CAN FD and LIN interfaces and supervision in a single package

OPTIREG™ power supply ICs are AEC-Q100 qualified for automotive environments and span from compact LDO regulators for sensor nodes to high-current DC-DC converters for all automotive applications.

Explore OPTIREG™ automotive power supply solutions

What types of power supply ICs are available?

Power supply ICs are available in several topologies and integration levels, each suited to specific voltage, current, and application requirements:

  • Linear regulators: deliver a clean, stable output voltage with inherently low noise – ideal for audio, sensor, and mixed-signal circuits
  • Switching regulators: offer high efficiency for step-down (buck), step-up (boost), or combined buck-boost conversion, handling higher power levels with low heat dissipation
  • DC-DC converters: transfer DC power between voltage levels with high efficiency, widely used in automotive body electronics, ADAS, and battery-powered systems
  • Power management ICs (PMICs): integrate multiple voltage rails, power sequencing, and monitoring in one device, reducing component count and board space
  • System basis chips (SBC): Infineon's OPTIREG™ SBCs combine voltage regulation, CAN FD and LIN communication interfaces, and supervisory circuits in a single package for automotive gateway and body control modules

Infineon's OPTIREG™ portfolio addresses the power challenges of automotive and beyond automotive systems: maximizing efficiency, meeting EMC requirements, and ensuring reliable, fault-tolerant power delivery.

Portfolio compatible with AURIX™ microcontrollers

What features do automotive power supply ICs offer?

Infineon's OPTIREG™ power supply ICs are designed for automotive-grade performance – AEC-Q100 qualified and compliant with ISO 26262 functional safety requirements.

Key features of OPTIREG™ automotive power supply ICs:

  • High efficiency: minimized switching losses reduce heat generation, keeping thermal budgets within compact ECU and body control module designs
  • Low noise and low ripple: stable output voltage and suppressed EMI support noise-sensitive circuits such as radar sensors, camera modules, and infotainment systems
  • Robust protection: built-in overvoltage, undervoltage, overcurrent, and thermal shutdown safeguard vehicle electronics against fault conditions
  • Wide input voltage range: compatible with 3.3 V to 40 V supply rails for flexible use across body, powertrain, and ADAS domains
  • Fast load transient response: maintains stable output under the dynamic load changes typical in hybrid and electric vehicle (EV) powertrains
Request automotive samples

How to select a power supply IC

Choosing the right power supply IC starts with matching the topology to the application's efficiency, noise, and size constraints.

Key selection criteria:

  • Topology: choose linear regulators (LDOs) for low dropout, low-noise applications; choose switching regulators (DC-DC converters) for higher power levels where efficiency is the priority
  • Input/output voltage range: confirm the VIN min/max and VOUT range cover the target operating conditions, including transients and automotive cold-crank scenarios
  • Output current: match the rated current to peak load requirements, with sufficient margin for thermal performance
  • Quiescent current: critical for always-on systems and battery-powered devices where standby power must be minimized
  • Certification: for automotive designs, select AEC-Q100 qualified devices; for functional safety, verify ISO 26262 ASIL rating and safety manual availability
  • Package and thermal: evaluate thermal resistance, PCB footprint, and pin compatibility for the intended board layout

Infineon's OPTIREG™ portfolio includes parametric selection tools and reference designs to support design-in across the most common automotive and industrial topologies.

Use the finder & selection tool

What are functional safety power supply ICs?

Automotive applications increasingly require power supply ICs that support functional safety standards. Infineon's OPTIREG™ family includes devices designed to support ASIL-B and ASIL-D system architectures in compliance with ISO 26262.

Functional safety features of OPTIREG™ power supply ICs:

  • Integrated supervision: window watchdog timers, voltage monitors, and reset controllers enable systematic failure detection across power domains
  • Safety documentation: FMEA reports and safety manuals are available for supported devices, accelerating ASIL decomposition and functional safety assessments
  • Diagnostic coverage: hardware-based fault detection for overvoltage, undervoltage, overcurrent, and overtemperature conditions reduces systematic and random hardware failures
  • AEC-Q100 qualification: automotive OPTIREG™ devices are qualified to Grade 0 or Grade 1, covering the extended temperature range required in powertrain and ADAS applications

Infineon provides reference schematics and application notes that demonstrate ISO 26262-compliant integration of OPTIREG™ power supply and supervisory ICs.

More about ISO 26262
Explore OPTIREG™ PMIC

OPTIREG™ power supply IC longevity and long-term availability

Automotive designs require long-term component availability. Infineon's smart power longevity program ensures planned long-term availability for the power supply IC product portfolio and other automotive smart power products - enabling confident supply chain planning across the full vehicle lifecycle.

Find information relating to the planned long-term availability of semiconductor products “longevity” for automotive smart power products.

Learn more about our longevity program

What are power supply ICs?

Power supply ICs (integrated circuits) regulate and convert electrical power across a broad range of end markets, including automotive, industrial, IoT, consumer, and medical applications.

Infineon's OPTIREG™ family covers the full spectrum of power supply IC types:

  • Linear voltage regulators (LDOs): stable, low-noise output for circuits where minimal ripple is critical
  • Switching regulators (DC-DC converters): step-down (buck), step-up (boost), and buck-boost topologies for high-efficiency power conversion
  • Power management ICs (PMICs): multi-rail integration that reduces component count and board space
  • System basis chips (SBCs): voltage supplies combined with CAN FD and LIN interfaces and supervision in a single package

OPTIREG™ power supply ICs are AEC-Q100 qualified for automotive environments and span from compact LDO regulators for sensor nodes to high-current DC-DC converters for all automotive applications.

Explore OPTIREG™ automotive power supply solutions

What types of power supply ICs are available?

Power supply ICs are available in several topologies and integration levels, each suited to specific voltage, current, and application requirements:

  • Linear regulators: deliver a clean, stable output voltage with inherently low noise – ideal for audio, sensor, and mixed-signal circuits
  • Switching regulators: offer high efficiency for step-down (buck), step-up (boost), or combined buck-boost conversion, handling higher power levels with low heat dissipation
  • DC-DC converters: transfer DC power between voltage levels with high efficiency, widely used in automotive body electronics, ADAS, and battery-powered systems
  • Power management ICs (PMICs): integrate multiple voltage rails, power sequencing, and monitoring in one device, reducing component count and board space
  • System basis chips (SBC): Infineon's OPTIREG™ SBCs combine voltage regulation, CAN FD and LIN communication interfaces, and supervisory circuits in a single package for automotive gateway and body control modules

Infineon's OPTIREG™ portfolio addresses the power challenges of automotive and beyond automotive systems: maximizing efficiency, meeting EMC requirements, and ensuring reliable, fault-tolerant power delivery.

Portfolio compatible with AURIX™ microcontrollers

What features do automotive power supply ICs offer?

Infineon's OPTIREG™ power supply ICs are designed for automotive-grade performance – AEC-Q100 qualified and compliant with ISO 26262 functional safety requirements.

Key features of OPTIREG™ automotive power supply ICs:

  • High efficiency: minimized switching losses reduce heat generation, keeping thermal budgets within compact ECU and body control module designs
  • Low noise and low ripple: stable output voltage and suppressed EMI support noise-sensitive circuits such as radar sensors, camera modules, and infotainment systems
  • Robust protection: built-in overvoltage, undervoltage, overcurrent, and thermal shutdown safeguard vehicle electronics against fault conditions
  • Wide input voltage range: compatible with 3.3 V to 40 V supply rails for flexible use across body, powertrain, and ADAS domains
  • Fast load transient response: maintains stable output under the dynamic load changes typical in hybrid and electric vehicle (EV) powertrains
Request automotive samples

How to select a power supply IC

Choosing the right power supply IC starts with matching the topology to the application's efficiency, noise, and size constraints.

Key selection criteria:

  • Topology: choose linear regulators (LDOs) for low dropout, low-noise applications; choose switching regulators (DC-DC converters) for higher power levels where efficiency is the priority
  • Input/output voltage range: confirm the VIN min/max and VOUT range cover the target operating conditions, including transients and automotive cold-crank scenarios
  • Output current: match the rated current to peak load requirements, with sufficient margin for thermal performance
  • Quiescent current: critical for always-on systems and battery-powered devices where standby power must be minimized
  • Certification: for automotive designs, select AEC-Q100 qualified devices; for functional safety, verify ISO 26262 ASIL rating and safety manual availability
  • Package and thermal: evaluate thermal resistance, PCB footprint, and pin compatibility for the intended board layout

Infineon's OPTIREG™ portfolio includes parametric selection tools and reference designs to support design-in across the most common automotive and industrial topologies.

Use the finder & selection tool

What are functional safety power supply ICs?

Automotive applications increasingly require power supply ICs that support functional safety standards. Infineon's OPTIREG™ family includes devices designed to support ASIL-B and ASIL-D system architectures in compliance with ISO 26262.

Functional safety features of OPTIREG™ power supply ICs:

  • Integrated supervision: window watchdog timers, voltage monitors, and reset controllers enable systematic failure detection across power domains
  • Safety documentation: FMEA reports and safety manuals are available for supported devices, accelerating ASIL decomposition and functional safety assessments
  • Diagnostic coverage: hardware-based fault detection for overvoltage, undervoltage, overcurrent, and overtemperature conditions reduces systematic and random hardware failures
  • AEC-Q100 qualification: automotive OPTIREG™ devices are qualified to Grade 0 or Grade 1, covering the extended temperature range required in powertrain and ADAS applications

Infineon provides reference schematics and application notes that demonstrate ISO 26262-compliant integration of OPTIREG™ power supply and supervisory ICs.

More about ISO 26262
Explore OPTIREG™ PMIC

OPTIREG™ power supply IC longevity and long-term availability

Automotive designs require long-term component availability. Infineon's smart power longevity program ensures planned long-term availability for the power supply IC product portfolio and other automotive smart power products - enabling confident supply chain planning across the full vehicle lifecycle.

Find information relating to the planned long-term availability of semiconductor products “longevity” for automotive smart power products.

Learn more about our longevity program
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