L9788

Power Management - Specialized Overview

The L9788 is a multifunction integrated circuit designed for automotive engine management systems, specifically targeting four-cylinder internal combustion engines. Manufactured using STMicroelectronics' proprietary BCD technology, it provides comprehensive power supplies and signal preprocessing peripherals required for engine control applications. The device integrates multiple regulators, including pre-boost, pre-buck, linear, and tracking types, alongside various low-side and high-side drivers for injectors, relays, LEDs, and ignition systems. It supports communication via K-Line (ISO9141/LIN 2.1) and CAN-FD with wake-up functionality. The component is housed in an LQFP-100 package with an exposed pad and is qualified under AEC-Q100 standards.

Power Management - Specialized Feature Summary

• Engineered for ISO26262 compliant system design to ensure functional safety in automotive environments
• Integrates coordinated soft-start capabilities across all voltage regulators for stable power sequencing
• Includes dedicated drivers with reverse battery protection and current sensing for critical loads
• Features built-in temperature monitoring, watchdog timers, and wake-up mechanisms for system reliability

Power Management - Specialized Applications

• Control of four-cylinder internal combustion engines in automotive applications
• Vehicle Control Unit (VCU) hardware development and reference designs
• Powertrain Domain Control Unit (PDCU) implementations
• Automotive chassis and safety system power management solutions

Power Management - Specialized Procurement Notes

Verify the specific ordering suffix and package variant against the official datasheet before procurement. Confirm that the selected revision matches the required functional safety level and communication interface configurations. Ensure compatibility with the intended microcontroller interface, such as MSC or LIN/CAN protocols, during the sourcing phase. Check for any specific manufacturing date codes or quality certifications required by your supply chain standards.

Power Management - Specialized Selection Notes

Select this component when designing systems requiring a consolidated solution for power distribution and load driving in engine management contexts. It is suitable for applications needing integrated protection features like over-current and over-temperature monitoring. Consider its compatibility with ST's ecosystem, including evaluation boards and software drivers, if rapid prototyping is required. Ensure the thermal performance of the LQFP-100 package meets the PCB layout requirements for the expected operating conditions.

Power Management - Specialized Part Context

The L9788 belongs to STMicroelectronics' portfolio of smart power devices for automotive applications, leveraging advanced BCD technology. It complements other components in the VCU and powertrain ecosystems, such as the SPC563M microcontrollers and related driver ICs. The device is part of a broader strategy to provide scalable, ISO26262-compliant solutions for modern vehicle architectures, supporting both passive and active safety systems through integrated diagnostics and robust power management.

Power Management - Specialized Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Consult STMicroelectronics technical support for cross-reference recommendations based on specific pinout and functional requirements.

Power Management - Specialized FAQ

What communication interfaces does the L9788 support?

The L9788 supports K-Line compliant with ISO9141/LIN 2.1 standards and includes CAN-FD functionality with wake-up capability.

Is the L9788 qualified for automotive use?

Yes, the L9788 is AEC-Q100 qualified and engineered for ISO26262 compliant systems.

What type of package is used for the L9788?

The L9788 is available in an LQFP-100 package with an exposed pad.