LM34925SD/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM34925SD/NOPB is a synchronous buck switching regulator featuring an integrated secondary-side bias regulator, designed for isolated DC-DC converter applications. It operates with an input voltage range of 7.5 V to 100 V and provides an adjustable output voltage starting from 1.225 V. The device delivers up to 100 mA of output current through a single channel. It supports a switch frequency adjustable up to 1 MHz and functions within a junction temperature range of -40°C to +125°C. Packaged in an 8-WSON (4x4 mm) surface-mount footprint.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a secondary-side bias regulator to eliminate the need for auxiliary windings or separate bias supplies in isolated topologies.
• Supports high-voltage operation with an input range extending up to 100 V, suitable for flyback and forward converters.
• Features synchronous rectification to enhance conversion efficiency across varying load conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Secondary-side regulation for isolated flyback power supplies
• Bias supply generation for primary-side controller circuits
• High-voltage isolated DC-DC converter modules

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against the manufacturer datasheet to confirm package type and tape/reel specifications. Ensure compatibility with the target isolation topology and thermal management requirements. Confirm RoHS compliance status and moisture sensitivity level prior to assembly planning. Cross-reference ordering information with official Texas Instruments documentation to avoid substitution errors.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing isolated converters requiring precise secondary-side regulation without auxiliary winding complexity. Consider the 100 mA output limit for biasing control ICs rather than main load delivery. Evaluate the 1 MHz frequency capability for balancing component size against electromagnetic interference constraints. Verify that the 8-WSON package fits the available PCB real estate and thermal dissipation strategy.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM34925 family of integrated bias regulators. It is distinct from standard buck converters by its internal architecture designed specifically for isolated applications. The SD/NOPB designation indicates the WSON-8 package and lead-free construction. It serves as a dedicated solution for powering gate drivers and feedback loops in high-voltage isolated systems.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM34925SDX/NOPB is a parameter-equivalent alternative within the same product line.