LM5117PSQ/NOPB

DC DC Switching Controllers Overview

The LM5117PSQ/NOPB is a synchronous buck controller from Texas Instruments designed for wide input voltage applications. It operates with an input supply range of 5.5V to 65V and supports switching frequencies between 50kHz and 750kHz. The device features emulated current mode control, providing inherent line feedforward and cycle-by-cycle current limiting. It delivers up to 20A output current capability with a maximum duty cycle of 98%. The output voltage ranges from 800mV to 62V. Operating temperatures span from -40°C to +125°C. The component is housed in a 24-WQFN package.

DC DC Switching Controllers Feature Summary

• Emulated current mode control architecture for stable operation across varying load conditions
• Integrated analog current monitor for precise overcurrent protection and system monitoring
• Wide input voltage range supporting high-voltage or fluctuating power sources
• Programmable switching frequency allows optimization for efficiency and component size

DC DC Switching Controllers Applications

• Industrial power supplies requiring wide input voltage tolerance
• Automotive systems utilizing high-voltage battery architectures
• Point-of-load regulation for computing and networking equipment
• Telecommunications infrastructure power distribution

DC DC Switching Controllers Procurement Notes

Verify the specific suffix codes against official datasheets to confirm package type and temperature grade. Ensure compatibility with required switching frequency settings during design validation. Cross-reference RoHS compliance status with manufacturer documentation prior to procurement. Confirm availability of evaluation boards for initial circuit testing and performance verification.

DC DC Switching Controllers Selection Notes

Select this controller when designing synchronous buck converters requiring inputs above standard low-voltage limits. The integrated current monitor simplifies protection circuitry compared to controllers lacking this feature. Consider the thermal performance of the WQFN package relative to the expected power dissipation. Evaluate external component selection based on the specified frequency range to meet efficiency targets.

DC DC Switching Controllers Part Context

This component belongs to the LM5117 family of wide input range synchronous buck controllers. It shares functional similarities with the LM25117 but differs in input voltage specifications and packaging options. The PSQ/NOPB designation indicates a specific commercial-grade variant within the broader product line, tailored for surface-mount assembly in compact power management designs.

DC DC Switching Controllers Replacement Considerations

LM5117PMHE/NOPB offers alternative HTSSOP-20 packaging for different board layout requirements while maintaining similar electrical characteristics.