L5975ADTR

Voltage Regulators - DC DC Switching Regulators Overview

The L5975ADTR is a step-down monolithic power switching regulator manufactured by STMicroelectronics. It features an internal P-Channel D-MOS transistor with a typical RDS(on) of 200mΩ, enabling efficient operation without a bootstrap capacitor. The device supports an operating input voltage range from 4.4V to 36V and provides an adjustable output voltage from 1.235V to 35V. It delivers up to 2.5A DC current to the load with a minimum switch current limit of 3.75A. The internal oscillator fixes the switching frequency at 500kHz. Key protection features include pulse-by-pulse current limiting, thermal shutdown, and feedback disconnection protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Internal P-Channel D-MOS switching element eliminates the need for a bootstrap capacitor
• Integrated 500kHz fixed-frequency oscillator minimizes external component size
• Pulse-by-pulse current limiting with internal frequency modulation for short-circuit protection
• Low dropout operation allowing 100% duty cycle for minimal voltage drop

Voltage Regulators - DC DC Switching Regulators Applications

• Computer-related applications requiring 5V bus conversion
• Automotive electronic systems
• Industrial control equipment
• General-purpose DC-DC step-down power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'ADTR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the 8-SOIC package dimensions align with the target PCB footprint. Ensure the component meets the necessary environmental standards for the intended deployment region before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a high-current buck converter is needed for 5V or higher input buses. The 500kHz switching frequency allows for smaller inductors compared to lower-frequency alternatives. Consider the thermal performance of the SOIC-8 package for the expected load conditions. Verify that the 4.4V minimum input voltage suits the system's lowest operating supply level.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the L597x series of step-down switching regulators from STMicroelectronics. It shares architectural similarities with the L5970 and L5972 but offers higher current capabilities. The series is designed for robust performance in automotive and industrial environments, utilizing internal DMOS technology for efficiency and reliability.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Check for direct pin-compatible substitutes within the same manufacturer portfolio. Verify that alternative components match the 500kHz switching frequency and 2.5A current rating. Ensure replacement parts support the same 4.4V to 36V input range and 8-SOIC package type.