L4963D013TR

Voltage Regulators - DC DC Switching Regulators Overview

The L4963D013TR is a monolithic power switching regulator from STMicroelectronics, functioning as a step-down (buck) converter. It delivers an output current of 1.5A with an adjustable output voltage range from 5.1V to 36V. The device operates in discontinuous variable frequency mode and accepts an input voltage between 9V and 46V. Key electrical parameters include a switching frequency range of 42kHz to 83kHz and a typical static supply current of 16mA. It features a precise on-chip reference with ±2% accuracy and supports a junction temperature operating range from -40°C to +150°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated thermal shutdown and internal current limiting for robust protection
• Built-in reset and power fail outputs designed for microprocessor supervision
• Remote inhibit capability allows for external control of the regulator state
• Variable frequency operation eliminates the need for external frequency compensation

Voltage Regulators - DC DC Switching Regulators Applications

• Microprocessor power supply systems requiring reset monitoring
• General-purpose DC-DC step-down conversion in industrial equipment
• Battery-powered devices utilizing adjustable voltage regulation
• Embedded systems needing thermal and current protection integration

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix D013TR corresponds to the SO-20 surface-mount package configuration. Confirm RoHS compliance status through official datasheets or manufacturer declarations prior to procurement. Ensure design compatibility with the specified 9V to 46V input range and 1.5A load requirements. Check for any obsolete status notifications or lifecycle changes directly from STMicroelectronics before finalizing component selection.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a buck converter with integrated microprocessor supervision signals is required. The adjustable output voltage up to 36V provides flexibility for various rail requirements. Consider the wide operating temperature range for harsh environments. The variable frequency mode may require careful filter design compared to fixed-frequency alternatives. Verify that the 1.5A current rating meets the peak load demands of the target application circuit.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the L4963 series of switching regulators. It is functionally related to the L4963D variant, sharing the same core specifications but differing in packaging. The L4963 series is categorized under PMIC - Power Management ICs within STMicroelectronics' portfolio. It serves as a legacy solution for applications transitioning from linear regulators to more efficient switching topologies.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The L4963D is listed as obsolete. Designers should evaluate alternative STMicroelectronics buck converters or third-party equivalents that offer similar current ratings and supervision features. Verify pinout compatibility if direct replacement is attempted. Review updated datasheets for any changes in thermal performance or electrical characteristics in successor components.