L5983TR

Voltage Regulators - DC DC Switching Regulators Overview

The L5983TR is a step-down switching regulator manufactured by STMicroelectronics, designed for high-efficiency DC-DC conversion. It features an embedded Power MOSFET with a minimum current limit of 2.0 A, enabling it to deliver an output current exceeding 1.5 A DC. The device operates with an input voltage range from 2.9 V to 18 V and supports adjustable output voltages from 600 mV up to the input voltage. Key electrical parameters include a default switching frequency of 250 kHz, which is programmable up to 1 MHz, and a maximum operating junction temperature of +150 °C. It utilizes a VFQFPN-EP-8 package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a current-limited embedded Power MOSFET capable of delivering high DC output currents.
• Supports low dropout operation with 100% duty cycle for efficient voltage regulation under varying load conditions.
• Includes internal soft-start functionality and an inhibit pin for controlled startup and power management.
• Provides comprehensive protection mechanisms including overcurrent limiting and thermal shutdown.

Voltage Regulators - DC DC Switching Regulators Applications

• Power supply stages for industrial control systems requiring robust buck conversion
• Embedded systems powered by 3.3 V or 5 V buses with variable load demands
• Battery-powered devices needing efficient step-down regulation from higher cell voltages

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific ordering suffix and tape-and-reel specifications against the manufacturer's latest datasheet before procurement. Confirm that the VFQFPN-EP-8 package dimensions match your PCB footprint design. Ensure compliance with RoHS directives if required for your target market. Check for any recent product change notices regarding assembly sites or material compositions to maintain supply chain consistency.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a non-synchronous buck converter with high current capability and wide input voltage range is required. It is suitable for applications where cost-effective regulation is prioritized over the highest possible efficiency at light loads. Consider the thermal performance of the exposed pad package in your layout strategy to ensure reliable operation within the specified temperature range.

Voltage Regulators - DC DC Switching Regulators Part Context

The L5983 belongs to STMicroelectronics' portfolio of monolithic buck converters and step-down switching regulators. This series is engineered for high reliability in automotive and industrial environments. The L5983TR variant specifically denotes the tape-and-reel packaging format, facilitating automated surface-mount assembly processes in high-volume manufacturing scenarios.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate alternative STMicroelectronics buck converters based on similar input/output voltage ranges and current capabilities if direct substitution is necessary.

Voltage Regulators - DC DC Switching Regulators FAQ

Can the switching frequency of the L5983 be adjusted?

Yes, the internal oscillator has a default frequency of 250 kHz but can be externally programmed to adjust the switching frequency up to 1 MHz.

What is the minimum input voltage required for operation?

The device requires a minimum input voltage of 2.9 V, making it suitable for applications powered by 3.3 V buses.

Does the L5983 support zero-load current operation?

Yes, the regulator is designed to operate efficiently even with zero load current, ensuring stable performance across all load conditions.