LM5115AMTX/NOPB

Power Supply Controllers, Monitors Overview

The LM5115AMTX/NOPB is a secondary side post regulator and synchronous buck controller manufactured by Texas Instruments, formerly National Semiconductor. It operates with an input voltage range of 5V to 30V and requires a 5V to 7.5V supply voltage. The device draws 4mA of supply current and functions within a temperature range of -40°C to 125°C. It is housed in a 16-TSSOP package with a width of 4.40mm. This component is designed for high-voltage applications up to 75V.

Power Supply Controllers, Monitors Feature Summary

• Functions as a secondary side post regulator and synchronous buck controller
• Supports operation at voltages up to 75V
• Integrated power-up sequencing capabilities

Power Supply Controllers, Monitors Applications

• Secondary side control in isolated DC-DC converters
• Post-regulation stages in power supply designs
• Synchronous buck converter implementations

Power Supply Controllers, Monitors Procurement Notes

Verify the manufacturer designation, as the part was originally from National Semiconductor but is now produced by Texas Instruments. Confirm the specific suffix 'NOPB' indicates lead-free and RoHS compliance. Ensure the package type matches the required 16-TSSOP footprint for PCB layout compatibility. Check for any specific ordering prefixes or suffixes that may affect availability or documentation.

Power Supply Controllers, Monitors Selection Notes

Select this component when designing isolated power supplies requiring secondary side regulation. It is suitable for applications needing synchronous rectification control. Consider the 75V rating for high-input voltage primary sides. Evaluate the thermal performance within the specified -40°C to 125°C operating range. Ensure the 16-TSSOP package fits the mechanical constraints of the design.

Power Supply Controllers, Monitors Part Context

This component belongs to the LM5115 family of secondary side controllers. It is often used in conjunction with primary side controllers to form complete isolated power conversion systems. The device replaces older discrete solutions by integrating control logic for synchronous buck topologies. It supports various isolation architectures common in industrial and consumer power supplies.

Power Supply Controllers, Monitors Replacement Considerations

LM5115SDX/NOPB is a documented alternative in the same family, offering similar functionality in a WSON package. LM5115MTCX/NOPB provides the same core features in a TSSOP package. Verify pinout compatibility and thermal characteristics when substituting between package types.