LM5575MH

Voltage Regulators - DC DC Switching Regulators Overview

The LM5575MH is a high-voltage step-down switching regulator from Texas Instruments, designed for robust power conversion in demanding environments. It operates with an input voltage range up to 75V and delivers a continuous output current of 1.5A. The device features a fixed internal switching frequency of 300kHz, enabling the use of compact external components. It supports adjustable output voltages starting from 1.225V and includes comprehensive protection mechanisms such as cycle-by-cycle current limiting, thermal shutdown, and undervoltage lockout. Packaged in a 16-pin HTSSOP with exposed pad for enhanced thermal performance, it meets AEC-Q100 automotive qualification standards.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-side N-channel MOSFET enables efficient buck topology without external driver requirements.
• Fixed 300kHz switching frequency allows for minimized passive component size while maintaining stable regulation.
• Comprehensive protection suite includes thermal shutdown, cycle-by-cycle current limiting, and undervoltage lockout for reliable operation under fault conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment and body control module power distribution
• Industrial DC-DC conversion for 24V or 48V bus systems
• Point-of-load regulation in high-voltage embedded computing platforms

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against the manufacturer's official datasheet to confirm package type and temperature grade. Ensure the ordering part number matches the required RoHS compliance and automotive qualification status. Cross-reference the final assembly code with recent production change notices to confirm component revision integrity before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when input voltages exceed standard 40V limits but require moderate current levels. The fixed 300kHz frequency simplifies electromagnetic interference filtering design compared to adjustable frequency variants. Evaluate thermal dissipation requirements carefully due to the power TSSOP package constraints in high-duty-cycle applications.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the SIMPLE SWITCHER family, characterized by integrated power switches and minimal external component counts. It serves as a high-voltage alternative to lower-input-range regulators, bridging the gap between standard 40V parts and more complex multi-stage solutions. The LM5575 series emphasizes ease of implementation in space-constrained industrial and automotive enclosures.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM5575MHX/NOPB: Pin-compatible variant available in tape-and-reel packaging instead of tube.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum input voltage supported by the LM5575MH?

The device supports a maximum input voltage of 75V.

Is the switching frequency adjustable on the LM5575MH?

No, the LM5575MH features a fixed internal switching frequency of 300kHz.