LM34925MRX/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM34925MRX/NOPB is a synchronous buck switching regulator designed for isolated secondary-side bias applications. It operates with an input voltage range of 7.5V to 100V and provides an adjustable output voltage starting from 1.225V. The device delivers up to 100mA of output current through a single channel. It features a fixed internal switching frequency of 1MHz, supporting compact passive component selection. The integrated controller includes protection mechanisms such as thermal shutdown and soft start functionality.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification for high efficiency in isolated topologies
• Wide input voltage capability suitable for various bus voltages
• Built-in thermal shutdown and soft-start capabilities

Voltage Regulators - DC DC Switching Regulators Applications

• Secondary side bias regulation for isolated DC/DC converters
• Auxiliary power supply generation in industrial power systems
• Bias winding regulation in flyback or forward converter designs

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'MRX' against the manufacturer's official documentation to confirm reel packaging specifications and tape dimensions. Ensure that the 'NOPB' designation aligns with current RoHS compliance requirements. Cross-reference the package marking code with the datasheet to distinguish between standard and extended temperature variants if applicable.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing isolated power supplies requiring a dedicated secondary-side bias rail. The 100mA output current limit defines its suitability for low-power control circuitry rather than main load driving. Consider the 1MHz switching frequency for trade-offs between component size and electromagnetic interference. Validate that the input voltage range covers the maximum bus voltage expected in the target application.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3492x family of integrated secondary-side bias regulators from Texas Instruments. These devices are specifically engineered to replace discrete solutions involving optocouplers and error amplifiers in isolated feedback loops. The family shares common architectural features but varies in output current capacity and input voltage ranges across different model numbers.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM34925MR/NOPB serves as a tube-packaged alternative to the MRX variant.