LM5118Q1MH/NOPB

DC DC Switching Controllers Overview

The LM5118Q1MH/NOPB is an automotive-grade, non-synchronous buck-boost switching controller from Texas Instruments. It supports a wide input voltage range of 3V to 75V and delivers up to 3.5A output current. Operating at a fixed 575kHz switching frequency, it utilizes current-mode control for stable regulation across buck and boost modes. The device features adaptive dead-time control and is housed in a 20-pin HTSSOP package with an exposed pad for thermal management, rated for operation between -40°C and +125°C.

DC DC Switching Controllers Feature Summary

• Supports buck, boost, and buck-boost topologies within a single controller architecture
• Integrated adaptive dead-time control for efficient external NMOS driving
• Automotive qualification compliant with AEC-Q100 standards

DC DC Switching Controllers Applications

• Automotive lighting systems requiring wide input voltage tolerance
• Battery-powered industrial equipment with varying supply levels
• DC-DC conversion stages in automotive infotainment units

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'Q1' confirms automotive grade qualification and AEC-Q100 compliance. Ensure the 'MH' package designation matches the required HTSSOP-20 footprint. Confirm 'NOPB' indicates lead-free and RoHS compliance. Cross-reference the manufacturer datasheet for any recent product change notifications affecting pinout or electrical characteristics before finalizing procurement.

DC DC Switching Controllers Selection Notes

Select this component when designing circuits that must handle input voltages both above and below the desired output level. It is suitable for applications requiring high efficiency without synchronous rectification complexity. Consider the fixed 575kHz frequency for EMI filtering requirements. Evaluate thermal performance based on the HTSSOP-20 package capabilities and expected load currents.

DC DC Switching Controllers Part Context

This part belongs to the LM5118 family of wide-input voltage controllers. It shares functional similarities with the standard LM5118 but includes enhanced reliability specifications for automotive environments. The family offers solutions for complex power conversion needs where input sources fluctuate significantly relative to the load requirements.

DC DC Switching Controllers Replacement Considerations

LM5118MH/NOPB (Standard Industrial Grade)

DC DC Switching Controllers FAQ

What is the maximum switching frequency?

The LM5118Q1MH/NOPB operates at a fixed switching frequency of 575 kHz.

Is this component suitable for synchronous rectification?

No, the LM5118Q1MH/NOPB is a non-synchronous controller designed to drive external NMOS transistors without integrated low-side gate drive.