L5988D

Voltage Regulators - DC DC Switching Regulators Overview

The L5988D is a monolithic synchronous step-down power switching regulator manufactured by STMicroelectronics. It delivers a continuous output current of 4 A, with peak capability exceeding 5 A depending on thermal conditions. The device operates with an input voltage range from 2.9 V to 18 V and provides an adjustable output voltage from 600 mV to 18 V. Key electrical parameters include a maximum static current of 2.4 mA, a programmable switching frequency between 100 kHz and 1 MHz, and a load regulation of 7.5 mV. It functions within a temperature range of -40 °C to +150 °C and is housed in a 16-pin HTSSOP package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Features a high-side PMOS switch enabling 100% duty cycle operation without external bootstrap capacitors.
• Includes a multifunction UOS pin for configurable under-voltage lockout, over-voltage protection, and soft-start sink capabilities.
• Supports synchronization to an external clock signal via the SYNCH pin for noise immunity.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load DC-DC conversion in industrial systems
• Power supply stages for embedded computing platforms
• Voltage regulation for automotive electronic modules

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors or certified partners. Confirm the specific ordering suffix matches the required tape-and-reel or tube packaging configuration. Ensure compliance with RoHS directives and check for moisture sensitivity levels prior to surface mount assembly. Review the latest datasheet revision for any updates to recommended operating conditions or pin assignments.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this regulator when a robust 4 A buck converter is required with flexible input voltage compatibility. The integrated PMOS topology simplifies design by eliminating bootstrap components. Consider the thermal performance constraints for peak currents above 4 A. Evaluate the need for external synchronization if operating in electrically noisy environments requiring precise frequency alignment.

Voltage Regulators - DC DC Switching Regulators Part Context

The L5988D belongs to STMicroelectronics' portfolio of monolithic step-down switching regulators designed for high-current applications. It shares functional similarities with the L5987 but offers higher current capacity. This component addresses the demand for efficient power management in space-constrained designs requiring reliable voltage regulation across wide input ranges.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Consult official documentation for qualified substitutes. Verify pin compatibility and thermal characteristics before transitioning to alternative part numbers.