L5962

Special Purpose Regulators Overview

The L5962 is a versatile power management integrated circuit designed for automotive applications, specifically car-radio sets. It integrates a step-down synchronous switching regulator with internal high-side and low-side NDMOS transistors, providing an adjustable output voltage range of 1.2 V to 8 V. The device supports selectable load currents of 1.2 A or 2.5 A via dedicated pins and operates at a free-run frequency of 185 kHz, with synchronization capabilities between 220 kHz and 400 kHz. Additionally, it includes multiple linear regulators: a standby regulator (3.3 V or 5 V @ 150 mA), a switched linear regulator (5 V or 8.5 V @ 350 mA), and another switched linear regulator (3.3 V or 10 V @ 1 A). The IC features two high-side drivers, reset functions, I²C bus control, under/over-voltage detection, and comprehensive protection mechanisms including thermal shutdown.

Special Purpose Regulators Feature Summary

• Integrates a synchronous buck converter with selectable output voltage and current modes
• Includes multiple configurable linear regulators for standby and switched operations
• Features I²C-controlled high-side drivers with robust protection circuits
• Provides comprehensive system monitoring including reset, watchdog, and battery detectors

Special Purpose Regulators Applications

• Power supply for car-radio sets
• Automotive audio systems requiring multiple regulated voltage rails
• Standby power management in vehicle infotainment units

Special Purpose Regulators Procurement Notes

Verify the obsolete status of the L5962 before initiating procurement. Confirm that the specific package variant and ordering suffix match the design requirements. Ensure that alternative components are evaluated for pin compatibility and electrical performance if the original part is no longer available for new designs. Check for any last-time buy notifications from the manufacturer.

Special Purpose Regulators Selection Notes

Select the L5962 when a single-chip solution is required to manage complex power needs in automotive audio environments. Consider its integrated switching and linear regulators to reduce component count and PCB space. Evaluate the need for I²C programmability for dynamic voltage adjustments. Assess the suitability of its low standby current for battery-saving applications in vehicles.

Special Purpose Regulators Part Context

The L5962 belongs to STMicroelectronics' portfolio of automotive power management devices. It utilizes BCD technology to combine high-voltage processes with digital logic, enabling high integration levels. This family of products targets the automotive sector, focusing on reliability and robustness against harsh electrical environments typical in vehicle power networks.

Special Purpose Regulators Replacement Considerations

As the L5962 is marked as obsolete, direct substitutes may not be available. Review STMicroelectronics' newer automotive power management ICs for functional equivalents. Verify that any replacement offers compatible pinouts, voltage ranges, and protection features to ensure seamless integration into existing designs without extensive redesign.

Special Purpose Regulators FAQ

What is the maximum quiescent current of the L5962 in standby mode?

The L5962 guarantees an extremely low quiescent current of 90 μA maximum in standby condition within the temperature range of -40 °C to 85 °C.

How is the output voltage of the synchronous buck regulator adjusted?

The output voltage of the step-down synchronous switching regulator is selectable through external resistors, allowing for a range between 1.2 V and 8 V.

Does the L5962 support synchronization with an external clock?

Yes, the device includes a SYNC function that allows the switching frequency to be synchronized with an external clock within the range of 220 kHz to 400 kHz.