LM34927MR/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM34927MR/NOPB is an integrated secondary side bias regulator designed for isolated DC/DC converters. It operates with a wide input voltage range of 7.5V to 100V and provides a maximum output current of 600mA. The device utilizes a buck topology with an adjustable switching frequency up to 1MHz. It features an adjustable output voltage, two outputs, and a low quiescent current of 1.75mA. The component is housed in an 8-SO PowerPAD package and supports operation temperatures from -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated secondary side bias regulation for isolated power supplies
• Wide input voltage capability supporting high-voltage primary side references
• Adjustable switching frequency for optimized efficiency and EMI performance
• High output current capacity for powering complex secondary side circuits

Voltage Regulators - DC DC Switching Regulators Applications

• Secondary side bias supply for isolated flyback converters
• Bias regulation for forward converter topologies
• Power management for isolated gate driver circuits
• Auxiliary power generation in industrial power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'MR' corresponds to the tube packaging variant when ordering. Confirm the 'NOPB' designation indicates lead-free and RoHS compliance. Ensure the design accounts for the SO-PowerPAD thermal requirements given the 600mA output capability. Cross-reference the datasheet revision to confirm pinout compatibility with existing layouts.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when the isolated secondary rail requires higher current than standard bias regulators provide. The 100V input rating allows direct connection to high-voltage auxiliary windings without external dividers. Consider the 1MHz frequency option if smaller passive components are desired. Compare against LM34926 or LM34925 if lower current requirements allow for cost reduction.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3492x family of secondary side bias regulators from Texas Instruments. It shares architectural similarities with the LM34925 (100mA) and LM34926 (300mA) variants but offers increased drive strength. The family targets applications requiring robust biasing for isolated control loops and gate drivers.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM34926MR/NOPB serves as a lower-current alternative within the same package. LM34925MR/NOPB is another lower-current option. Verify that the load current does not exceed the capabilities of these substitutes.