OPTIREG™ PMIC: Automotive power management ICs

Automotive power management ICs (PMICs) for reliable multi-rail ECU power in safety-critical designs

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Overview

Infineon’s OPTIREG™ PMIC family combines regulated power delivery, monitoring and protection functions for demanding automotive ECUs. The portfolio supports safety-focused and general-purpose designs across key vehicle domains.

Key Features

  • ISO 26262-compliant
  • Boost capability
  • Pre/post-regulator architecture
  • Multiple voltage supplies
  • Device software

Products

About

Infineon's automotive PMIC portfolio: General purpose and application-specific

A power management IC (PMIC) combines several regulator and protection functions in one device, helping reduce discrete components in an automotive ECU. Infineon’s OPTIREG™ PMIC portfolio is structured around two product groups:

  • General purpose PMICs: flexible solutions for standard automotive ECU power architectures
  • Application-specific PMICs: optimized solutions for dedicated use cases, such as powertrain and transmission control modules
View general purpose products
View application-specific products

Key engineering benefits of OPTIREG™ automotive PMICs

OPTIREG™ PMICs are engineered to simplify power design for demanding automotive ECUs. Key benefits include:
 
  1. Higher integration: OPTIREG™ PMICs integrate key power-management building blocks in one device, helping reduce external components and simplify the ECU bill of materials.
  2. Topology flexibility: Pre- and post-regulator architectures, boost capability and multiple voltage supplies give engineers options for different automotive power-tree concepts.
  3. Scalable design approach: The family supports different ECU complexity levels, from general-purpose supply concepts to more application-specific implementations.
AURIX™ TC3xx microcontroller family
AURIX™ TC4xx microcontroller family

Automotive PMIC key parameters for ECU power supply design

The following parameters are the most relevant when selecting an OPTIREG™ PMIC for an ECU design:
 
  • Switching frequency (fSW) 200 kHz to 2 MHz: Supports trade-offs between passive component size, efficiency and EMI behavior.
  • Operating junction temperature (TJ) up to 175°C: Relevant for thermally demanding automotive environments.
  • Safety integrity level (ASIL) up to ASIL-D: Select according to the target ISO 26262 system safety concept.
  • SPI interface width 16-bit: Relevant for configuration, diagnostics and system monitoring.
Go to PMIC finder
Go to Solution finder

Infineon’s OPTIREG™ PMIC thermal and reliability data: access to the complete OPTIREG™ PMIC technical documentation

OPTIREG™ PMIC technical documentation gives engineers the thermal and reliability data needed for automotive ECU design:

  • Thermal operating window: OPTIREG™ PMICs are designed for demanding automotive temperature environments and stable ECU operation under relevant load conditions.
  • Reliability considerations: Device documentation helps engineers evaluate operating limits, implementation constraints and robustness requirements during ECU development.
  • Development documentation: Datasheets, safety-related material and design guidance support thermal assessment, design reviews and validation planning. To get access to the complete OPTIREG™ PMIC technical documentation please follow the link below.
Go to myICP

OPTIREG™ PMIC use cases across automotive ECUs

OPTIREG™ PMICs are used across a broad range of automotive electronic control units, including body, chassis, safety, ADAS, infotainment, powertrain, transmission and electric drivetrain applications.

In safety-relevant systems, the PMIC supports the ECU power concept for microcontroller, transceiver, sensor and peripheral rails. In body and comfort electronics, integrated supply functions help reduce design complexity. In powertrain and drivetrain systems, robust power architecture supports operation in demanding electrical and thermal environments.

Are you searching for functional safety components for your application design? With Infineon's ISO 26262-compliant and ISO-26262-ready products, we are responding to the increased complexity and strict requirements for automotive application modules. 

ISO 26262 - Functional Safety (FuSa)

Automotive PMIC selection guide: safety, voltage and temperature

Selecting the right OPTIREG™ PMIC for an ECU design involves the following steps:

Step 1: Define the ECU power architecture

List required rails, current levels, sequencing needs and supervision functions.

Step 2: Determine the safety target

Map the application’s ISO 26262 requirements to the PMIC’s diagnostic and ASIL support.

Step 3: Check input conditions and topology

Match battery-voltage behavior and transient conditions with the appropriate regulator architecture. Verify the final operating voltage range before publishing.

Step 4: Assess the thermal environment

Select the device according to the ECU location, load profile and expected operating temperature.

Step 5: Compare available devices

Use the OPTIREG™ PMIC selection guide and product filter to compare rail count, output current, interface, package and safety-related features.

Go to PMIC finder
Ask the community

OPTIREG™ PMIC advantage: ecosystem support and long-term availability

Infineon's OPTIREG™ PMIC portfolio offers several advantages for automotive ECU design:

  • Infineon MCU ecosystem fit: OPTIREG™ PMICs are designed for use in Infineon-based automotive ECU architectures, supporting coordinated power and supervision concepts.
  • Scalable portfolio: General Purpose and Application-Specific PMICs help engineers match device integration level to the ECU function, rail count and safety needs.
  • Automotive supply commitment: Infineon supports automotive programs with lifecycle-oriented product planning for long platform development and production timelines.
  • Expert design support: Technical documentation and application expertise help customers move from device selection to validated ECU implementation.
Smart Power longevity program

OPTIREG™ PMIC resources: evaluation kits, SPICE models and software

Infineon provides a comprehensive set of resources to support OPTIREG™ PMIC design-in:

  • Evaluation kits: OPTIREG™ PMIC evaluation boards help engineers test supply behavior, sequencing and communication before final ECU design.
  • Simulation and design models: SPICE models and design files support pre-layout validation of regulator behavior, load response and power architecture choices.
  • Application notes and design guides: Documentation explains regulator design, supervision concepts, diagnostics and ECU implementation considerations.
  • Software and configuration support: Register descriptions, configuration examples and tool support help integrate OPTIREG™ PMIC devices into the ECU firmware workflow.
  • Selection guide: The OPTIREG™ PMIC selection guide and product filter support comparison by rail count, voltage range, interface, package and safety-related features.
Infineon Spice simulation tool
Go to developer center

Infineon's automotive PMIC portfolio: General purpose and application-specific

A power management IC (PMIC) combines several regulator and protection functions in one device, helping reduce discrete components in an automotive ECU. Infineon’s OPTIREG™ PMIC portfolio is structured around two product groups:

  • General purpose PMICs: flexible solutions for standard automotive ECU power architectures
  • Application-specific PMICs: optimized solutions for dedicated use cases, such as powertrain and transmission control modules
View general purpose products
View application-specific products

Key engineering benefits of OPTIREG™ automotive PMICs

OPTIREG™ PMICs are engineered to simplify power design for demanding automotive ECUs. Key benefits include:
 
  1. Higher integration: OPTIREG™ PMICs integrate key power-management building blocks in one device, helping reduce external components and simplify the ECU bill of materials.
  2. Topology flexibility: Pre- and post-regulator architectures, boost capability and multiple voltage supplies give engineers options for different automotive power-tree concepts.
  3. Scalable design approach: The family supports different ECU complexity levels, from general-purpose supply concepts to more application-specific implementations.
AURIX™ TC3xx microcontroller family
AURIX™ TC4xx microcontroller family

Automotive PMIC key parameters for ECU power supply design

The following parameters are the most relevant when selecting an OPTIREG™ PMIC for an ECU design:
 
  • Switching frequency (fSW) 200 kHz to 2 MHz: Supports trade-offs between passive component size, efficiency and EMI behavior.
  • Operating junction temperature (TJ) up to 175°C: Relevant for thermally demanding automotive environments.
  • Safety integrity level (ASIL) up to ASIL-D: Select according to the target ISO 26262 system safety concept.
  • SPI interface width 16-bit: Relevant for configuration, diagnostics and system monitoring.
Go to PMIC finder
Go to Solution finder

Infineon’s OPTIREG™ PMIC thermal and reliability data: access to the complete OPTIREG™ PMIC technical documentation

OPTIREG™ PMIC technical documentation gives engineers the thermal and reliability data needed for automotive ECU design:

  • Thermal operating window: OPTIREG™ PMICs are designed for demanding automotive temperature environments and stable ECU operation under relevant load conditions.
  • Reliability considerations: Device documentation helps engineers evaluate operating limits, implementation constraints and robustness requirements during ECU development.
  • Development documentation: Datasheets, safety-related material and design guidance support thermal assessment, design reviews and validation planning. To get access to the complete OPTIREG™ PMIC technical documentation please follow the link below.
Go to myICP

OPTIREG™ PMIC use cases across automotive ECUs

OPTIREG™ PMICs are used across a broad range of automotive electronic control units, including body, chassis, safety, ADAS, infotainment, powertrain, transmission and electric drivetrain applications.

In safety-relevant systems, the PMIC supports the ECU power concept for microcontroller, transceiver, sensor and peripheral rails. In body and comfort electronics, integrated supply functions help reduce design complexity. In powertrain and drivetrain systems, robust power architecture supports operation in demanding electrical and thermal environments.

Are you searching for functional safety components for your application design? With Infineon's ISO 26262-compliant and ISO-26262-ready products, we are responding to the increased complexity and strict requirements for automotive application modules. 

ISO 26262 - Functional Safety (FuSa)

Automotive PMIC selection guide: safety, voltage and temperature

Selecting the right OPTIREG™ PMIC for an ECU design involves the following steps:

Step 1: Define the ECU power architecture

List required rails, current levels, sequencing needs and supervision functions.

Step 2: Determine the safety target

Map the application’s ISO 26262 requirements to the PMIC’s diagnostic and ASIL support.

Step 3: Check input conditions and topology

Match battery-voltage behavior and transient conditions with the appropriate regulator architecture. Verify the final operating voltage range before publishing.

Step 4: Assess the thermal environment

Select the device according to the ECU location, load profile and expected operating temperature.

Step 5: Compare available devices

Use the OPTIREG™ PMIC selection guide and product filter to compare rail count, output current, interface, package and safety-related features.

Go to PMIC finder
Ask the community

OPTIREG™ PMIC advantage: ecosystem support and long-term availability

Infineon's OPTIREG™ PMIC portfolio offers several advantages for automotive ECU design:

  • Infineon MCU ecosystem fit: OPTIREG™ PMICs are designed for use in Infineon-based automotive ECU architectures, supporting coordinated power and supervision concepts.
  • Scalable portfolio: General Purpose and Application-Specific PMICs help engineers match device integration level to the ECU function, rail count and safety needs.
  • Automotive supply commitment: Infineon supports automotive programs with lifecycle-oriented product planning for long platform development and production timelines.
  • Expert design support: Technical documentation and application expertise help customers move from device selection to validated ECU implementation.
Smart Power longevity program

OPTIREG™ PMIC resources: evaluation kits, SPICE models and software

Infineon provides a comprehensive set of resources to support OPTIREG™ PMIC design-in:

  • Evaluation kits: OPTIREG™ PMIC evaluation boards help engineers test supply behavior, sequencing and communication before final ECU design.
  • Simulation and design models: SPICE models and design files support pre-layout validation of regulator behavior, load response and power architecture choices.
  • Application notes and design guides: Documentation explains regulator design, supervision concepts, diagnostics and ECU implementation considerations.
  • Software and configuration support: Register descriptions, configuration examples and tool support help integrate OPTIREG™ PMIC devices into the ECU firmware workflow.
  • Selection guide: The OPTIREG™ PMIC selection guide and product filter support comparison by rail count, voltage range, interface, package and safety-related features.
Infineon Spice simulation tool
Go to developer center
Documents

Design resources

Developer community