L5988DTR

Voltage Regulators - DC DC Switching Regulators Overview

The L5988DTR is a monolithic step-down power switching regulator manufactured by STMicroelectronics, designed to deliver a continuous output current of 4 A to the load. It supports an input voltage range from 2.9 V to 18 V and provides an adjustable output voltage between 0.6 V and 18 V. The device features synchronous rectification with an internal high-side PMOS switch enabling 100% duty cycle operation without external bootstrap capacitors. The switching frequency is adjustable via an external resistor from 100 kHz to 1 MHz or can be synchronized to an external signal. It is housed in a 16-PowerTSSOP package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous buck topology with integrated high-side PMOS switch for low dropout operation
• Adjustable switching frequency from 100 kHz to 1 MHz with external synchronization capability
• Multifunction UOS pin for configurable undervoltage lockout thresholds and overvoltage protection modes
• Integrated soft-start with constant current limit protection and hiccup mode recovery

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for digital logic and microprocessors
• Power supply stages for industrial control systems
• Battery-powered equipment requiring efficient step-down conversion
• Automotive electronics operating within specified thermal limits

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific ordering suffix to confirm packaging type, as the base part number may correspond to different tape-and-reel quantities or tube configurations. Ensure the selected variant matches the required operating temperature range and package dimensions for your PCB layout. Cross-reference the manufacturer's latest datasheet revision to confirm pinout compatibility and updated electrical characteristics before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a high-efficiency synchronous buck converter is required for loads up to 4 A. Consider the thermal performance constraints, as the continuous current rating is limited by the junction-to-ambient thermal impedance of the system. Evaluate the need for external synchronization if electromagnetic interference management is critical. Verify that the input voltage range aligns with the available power source and that the output voltage setting falls within the 0.6 V to 18 V window.

Voltage Regulators - DC DC Switching Regulators Part Context

The L5988DTR belongs to the L5988 family of monolithic step-down regulators from STMicroelectronics. This series is characterized by its ability to handle high currents in compact packages while maintaining efficiency through synchronous rectification. The DTR suffix typically denotes the tape-and-reel packaging format, distinguishing it from other variants like the L5988D which may use tube packaging. The family is designed for applications demanding robust protection features and flexible configuration options.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include the L5988D (tube version) for identical electrical specifications with different packaging. For similar functionality, consider the L5987 series for lower current requirements. Verify pinout compatibility and thermal characteristics when transitioning between these variants to ensure seamless integration into existing designs.