L5959

Special Purpose Regulators Overview

The L5959 is a voltage regulator IC featuring four outputs and two protected high-side drivers (HSDs). It includes an 8.5V output at 200mA, selectable 8V or 10V output at 1000mA, a permanent 3.3V standby output at 100mA, and a switchable 3.3V output at 800mA. The device integrates two HSDs with protection against loss of ground and battery. Key features include very low stand-by current, reset function, under/over-voltage detection, overcurrent limitation, load dump protection, and independent thermal shutdown for all regulators and HSDs.

Special Purpose Regulators Feature Summary

• Integrates four distinct voltage regulators with specific current capabilities for various system needs.
• Includes two high-side drivers protected against loss of ground and loss of battery conditions.
• Provides comprehensive monitoring including reset functions and battery voltage warning outputs.
• Features independent thermal shutdown and overcurrent limitation for all internal regulators and drivers.

Special Purpose Regulators Applications

• Automotive electronic systems requiring robust power management
• Applications needing integrated high-side switching with fault protection
• Systems requiring low stand-by current consumption
• Circuits demanding under/over voltage detection and reset generation

Special Purpose Regulators Procurement Notes

Verify the component status as the source material indicates the L5959 is obsolete. Confirm availability through authorized distributors or secondary markets if active procurement is required. Ensure compatibility with existing designs due to potential end-of-life status. Check for alternative replacement parts from the manufacturer if long-term supply stability is a priority for the project.

Special Purpose Regulators Selection Notes

Select this component when a single IC solution is needed for multiple voltage rails and high-side switching in automotive environments. It is suitable for designs prioritizing board space reduction by integrating regulators and protected drivers. Consider its low stand-by current for battery-sensitive applications. Verify that the available output currents meet the specific load requirements of the target system before finalizing the selection.

Special Purpose Regulators Part Context

The L5959 belongs to STMicroelectronics' portfolio of power management integrated circuits designed for automotive and industrial applications. It combines linear regulation with high-side driver technology to simplify power distribution architectures. This integration reduces the component count compared to discrete solutions, offering a compact approach to managing multiple voltage levels and load switching within a single package.

Special Purpose Regulators Replacement Considerations

As the L5959 is marked as obsolete, direct substitutes may not be readily available. Review STMicroelectronics' newer automotive power management families for functional equivalents. Evaluate pin-to-pin compatible alternatives or redesign the power stage to accommodate modern components with updated feature sets and supply chain stability.

Special Purpose Regulators FAQ

What protections are included for the high-side drivers?

The two high-side drivers are protected against loss of ground and loss of battery conditions, along with overcurrent limitation and independent thermal shutdown.

Does the L5959 support load dump protection?

Yes, the device includes load dump protection as part of its feature set to handle transient voltage events common in automotive environments.

How many voltage outputs does the L5959 provide?

The L5959 contains four voltage regulators providing different fixed or selectable output voltages and currents.