L5963Q-V0T

Overview

The L5963Q-V0T is an AEC-Q100 qualified dual monolithic switching regulator with integrated LDO and HSD. It features two step-down synchronous DC-DC converters with internal power switches, supporting a wide input voltage range from 3.5 V to 26 V. Each converter delivers up to 3.0 A load current with a minimum output of 1 V. The device operates at a free-run frequency of 250 kHz, with synchronization capability extending the range up to 2 MHz. It includes a standby linear regulator with 250 mA maximum current and a high-side driver. Standby quiescent current is typically 25 μA.

Feature Summary

• Dual synchronous step-down regulators with internal NDMOS switches for direct vehicle battery connection
• Synchronization input allows frequency adjustment up to 2 MHz to reduce AM/FM interference
• Integrated low dropout linear regulator and high-side driver with comprehensive protection circuits
• Programmable under-voltage detector and independent hardware enable pins for flexible system control

Applications

• Automotive electronic control units requiring load dump protection
• Vehicle infotainment systems needing multiple regulated voltage rails
• Industrial applications demanding wide input voltage ranges
• Systems requiring synchronized switching frequencies to minimize electromagnetic interference

Procurement Notes

Verify the specific suffix 'V0T' against official STMicroelectronics documentation to confirm exact package type and temperature grade. Ensure compatibility with automotive reliability standards required for your design. Confirm availability through authorized distributors as supply chain conditions may vary. Cross-reference pinout and thermal characteristics with the final datasheet before PCB layout.

Selection Notes

Select this component when designing automotive power architectures requiring dual isolated outputs with high current capability. The synchronization feature is critical for systems sensitive to radio frequency interference. Consider the thermal performance of the available packages if operating near maximum load currents. Verify that the 3.5 V minimum input voltage aligns with your vehicle's cold-cranking specifications.

Part Context

The L5963 series belongs to STMicroelectronics' portfolio of automotive power management ICs designed for robustness in harsh electrical environments. This family integrates multiple regulation functions into a single chip to reduce board space and component count. The L5963 specifically targets applications where efficiency, thermal management, and electromagnetic compatibility are primary design constraints.

Replacement Considerations

Publicly confirmed substitute part numbers for the L5963Q-V0T are not available in the provided source material. Engineering teams should consult official manufacturer cross-reference guides or contact STMicroelectronics sales representatives directly for validated alternative components.