L5963Q-V0Y

Overview

The L5963Q-V0Y is an AEC-Q100 qualified dual monolithic switching regulator with integrated LDO and HSD, designed for automotive applications. It features two step-down synchronous DC-DC converters with internal power switches supporting a wide input voltage range of 3.5 V to 26 V and up to 3.0 A load current per converter. The device includes one standby/linear regulator with 250 mA capability and one high-side driver. Operating frequencies range from 250 kHz free-run to 2 MHz synchronization, enabling reduced AM/FM interference. Standby quiescent current is typically 25 μA.

Feature Summary

• Dual synchronous buck regulators with independent hardware enable pins and programmable frequency dividers
• Integrated low-dropout linear regulator functioning as a standby or backup supply
• High-side driver with maximum drop of 0.5 V at 0.5 A
• Comprehensive protection against short circuits, loss of ground/battery, and unsupplied conditions

Applications

• Automotive systems requiring load dump protection
• Vehicle battery connected direct-input power architectures
• Applications demanding reduced AM/FM radio interference via synchronized high-frequency operation

Procurement Notes

Verify the specific suffix 'V0Y' against the official STMicroelectronics datasheet to confirm exact package type (PowerSSO-36 or VQFPN-48) and temperature grade. Ensure compatibility with required thermal management solutions if slug-up packages are utilized. Confirm AEC-Q100 qualification status matches project requirements for automotive deployment.

Selection Notes

Select this component when designing automotive power trains requiring dual isolated outputs with high efficiency and a dedicated linear backup source. The synchronization input allows flexibility in managing electromagnetic interference. Consider the 180-degree phase shift between PWM outputs for improved ripple cancellation in sensitive analog loads.

Part Context

The L5963 series belongs to STMicroelectronics' portfolio of automotive-grade power management ICs. It integrates multiple regulation functions into a single monolithic solution, reducing board space compared to discrete designs. The Q variant denotes automotive qualification, ensuring reliability under harsh environmental conditions typical in vehicle electronics.

Replacement Considerations

Public documentation does not list confirmed substitute part numbers for the L5963Q-V0Y. Engineers should consult STMicroelectronics for direct replacements or evaluate alternative dual-buck regulators with similar automotive qualifications and pin configurations.