Infineon TLF4D985QX OPTIREG™ PMIC

Introduction

The Infineon TLF4D985QX is an automotive Power Management IC (PMIC) from the OPTIREG™ TLF4Dx family. It is designed to provide efficient, monitored, and safety-oriented power conversion for demanding vehicle electronic systems, including applications requiring support up to ASIL D functional-safety targets.

Part Description

The TLF4D985QX integrates several power-management functions into a single automotive-qualified device. Its broad 3.8 V to 60 V input-voltage range allows it to operate from common automotive power rails while tolerating challenging supply conditions.

A configurable multiphase synchronous buck converter can deliver up to 7 A, providing a high-efficiency primary supply rail for processors, controllers, communications modules, or other high-current loads. The device also includes low-dropout regulators for additional lower-current rails, reducing the need for separate external regulation ICs.

Built-in voltage monitoring and safety functions help designers supervise power-rail behavior and implement reliable system-level fault handling. The TLF4D985QX is qualified to AEC-Q100 Grade 0, making it suitable for high-temperature automotive environments.

Key characteristics include:

• 3.8 V to 60 V automotive input-voltage range
• Configurable multiphase synchronous buck converter
• Up to 7 A output capability
• Integrated low-dropout regulators
• Voltage-monitoring functions
• Safety features supporting systems up to ASIL D
• AEC-Q100 Grade 0 qualification
• Automotive-focused OPTIREG™ power-management architecture

Applications

Potential applications for the TLF4D985QX include:

• Automotive electronic control units
• Advanced driver-assistance systems
• Vehicle domain controllers
• Zonal control modules
• Automotive gateway modules
• Radar and sensor-processing units
• Camera control and image-processing systems
• In-vehicle infotainment platforms
• Digital instrument clusters
• Telematics control units
• Battery-management support electronics
• Automotive communication modules

Industries

The TLF4D985QX is particularly relevant to the following industries:

• Automotive manufacturing
• Electric vehicle development
• Autonomous and assisted-driving technology
• Automotive electronics design
• Transportation systems
• Fleet-management technology
• Commercial and heavy-duty vehicle systems
• Industrial vehicle and mobile-equipment manufacturing

Usage Ideas

1. ADAS Sensor Controller Power Supply
   Use the PMIC to generate regulated rails for a radar, camera, or sensor-processing controller while using its monitoring features to detect power faults.

2. Automotive Zonal Controller
   Build a compact zonal controller power subsystem using the 7 A buck converter for the main processor rail and LDOs for communication transceivers and peripheral circuitry.

3. High-Temperature Telematics Unit
   Design a robust telematics control module capable of operating in elevated under-hood or cabin temperatures, with monitored supplies for the modem, processor, and GNSS circuitry.

Conclusion

The Infineon TLF4D985QX OPTIREG™ PMIC combines high-current synchronous buck conversion, integrated LDO rails, voltage supervision, and automotive safety functions in a compact power-management solution. Its wide input range, support for systems up to ASIL D, and AEC-Q100 Grade 0 qualification make it a strong choice for reliable, high-performance automotive electronic designs.