L5963D-EHX

Overview

The L5963D-EHX is an automotive-grade dual monolithic switching regulator featuring integrated Low Dropout (LDO) and High Side Driver (HSD) capabilities. It includes two step-down synchronous DC-DC converters with internal power switches, supporting a wide input voltage range from 3.5 V to 26 V. The device offers a maximum load current of 3.0 A per converter and operates at a free-run frequency of 250 kHz, with synchronization support up to 2 MHz. It also incorporates a standby linear regulator capable of delivering 250 mA. The component ensures extremely low quiescent current in standby conditions and provides independent hardware enable pins for each regulator.

Feature Summary

• Dual synchronous step-down switching regulators with internal high-side and low-side NDMOS switches
• Integrated standby/linear regulator and high-side driver for flexible power management
• Synchronization input allows frequency adjustment between 250 kHz and 2 MHz to reduce interference
• AEC-Q100 qualified for automotive reliability with comprehensive protection features

Applications

• Automotive infotainment systems requiring multiple regulated voltage rails
• Vehicle battery-powered applications needing load dump protection
• Systems requiring synchronized switching frequencies to minimize AM/FM radio interference
• Backup power supply configurations using the integrated standby regulator

Procurement Notes

Verify the specific suffix 'EHX' against the official STMicroelectronics datasheet to confirm package type and tape/reel specifications. Ensure the ordering part number matches the required temperature grade and packaging format. Cross-reference with the latest production data sheet to confirm availability status and any potential obsolescence notices before finalizing procurement plans.

Selection Notes

Select this component when designing automotive electronics that require a compact solution combining switching regulators with linear backup capabilities. It is suitable for applications demanding wide input voltage tolerance and precise power sequencing through independent enable pins. Consider the thermal performance of the PowerSSO-36 or VQFPN-48 packages based on the expected load current and ambient operating conditions.

Part Context

The L5963 belongs to STMicroelectronics' family of automotive power management ICs designed for robust vehicle environments. It complements other regulators like the L5962 by offering higher current capabilities and advanced synchronization features. This series addresses the need for efficient power conversion while maintaining compatibility with direct vehicle battery connections and strict automotive standards.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs by comparing pinout configurations, electrical parameters, and thermal characteristics with alternative components from the same manufacturer or other suppliers.