L5963DN-EHX

Overview

The L5963DN-EHX is an AEC-Q100 qualified dual monolithic switching regulator featuring two synchronous step-down DC-DC converters, a low-dropout linear regulator (LDO), and a high-side driver (HSD). It supports a wide input voltage range from 3.5 V to 26 V, allowing direct connection to vehicle batteries. The device offers a free-run frequency of 250 kHz with synchronization capabilities up to 2 MHz, enabling 180° phase-shifted PWM outputs to reduce electromagnetic interference. It provides independent hardware enable pins, programmable under-voltage detection, and extremely low standby quiescent current.

Feature Summary

• Dual synchronous buck regulators with integrated high-side and low-side NDMOS switches
• Integrated low-dropout linear regulator functioning as a standby or backup supply
• High-side driver capable of driving external power switches
• Synchronization input for adjustable operating frequency to minimize radio interference

Applications

• Automotive electronic control units requiring load dump protection
• Infotainment systems needing multiple regulated voltage rails
• Instrument clusters and body control modules
• ADAS sensor power distribution networks

Procurement Notes

Verify the specific suffix DN-EHX against the manufacturer's official datasheet to confirm package type and temperature grade. Ensure compatibility with automotive reliability standards such as AEC-Q100 before integration. Cross-reference pinouts and thermal characteristics with the final design requirements to avoid interface mismatches.

Selection Notes

Select this component when designing automotive systems that require a single IC solution for multiple power domains. It is suitable for applications demanding wide input voltage tolerance and low standby consumption. Consider the available packages, including slug-up options for enhanced thermal performance, based on the specific heatsinking constraints of the target enclosure.

Part Context

This part belongs to STMicroelectronics' L5963 family of automotive power management integrated circuits. The family is designed to simplify power architecture in vehicles by combining switching regulators, linear regulators, and drivers into a single monolithic chip. These devices are engineered to meet the stringent electrical and environmental requirements of modern automotive electronics.

Replacement Considerations

Consult the official STMicroelectronics replacement guide for verified cross-references. Ensure any substitute maintains AEC-Q100 qualification and compatible pinout configurations.