LM34926SD/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM34926SD/NOPB is a synchronous buck switching regulator designed for isolated secondary-side bias applications. It operates with an input voltage range of 7.5 V to 100 V and delivers up to 300 mA output current. The device features an integrated 1 MHz fixed switching frequency and adjustable output voltage. It supports two independent outputs within a single package. Operating temperatures range from -40°C to +125°C, housed in an SO-PowerPAD-8 surface-mount package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated secondary-side bias regulation for isolated DC/DC converters
• Synchronous buck topology with wide input voltage capability
• Dual independent output channels within a compact package

Voltage Regulators - DC DC Switching Regulators Applications

• Secondary-side bias supply for isolated flyback converters
• Auxiliary power generation in high-voltage isolated systems
• Bias winding replacement in offline switch-mode power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm pinout and thermal pad configuration. Ensure the ordering part number matches the required package variant, as suffixes may indicate tape-and-reel versus tube packaging or temperature grade variations. Cross-reference the datasheet revision date to confirm compatibility with current design specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing isolated power stages requiring secondary-side regulation without external bias windings. The 300 mA current rating suits moderate load requirements compared to higher-current family members. Consider the 1 MHz switching frequency for balancing efficiency and passive component size. Verify that the 100 V maximum input rating aligns with the primary side reflected voltage levels.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM3492x series of integrated secondary bias regulators. It complements parts like the LM34925 (100 mA) and LM34927 (600 mA) by offering a middle-ground current capacity. The series targets designers seeking to simplify isolated converter designs by eliminating traditional auxiliary transformer windings.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum input voltage for the LM34926SD/NOPB?

The maximum input voltage is 100 V.

Does the LM34926 support synchronous rectification?

Yes, the device utilizes a synchronous buck topology with integrated high-side and low-side switches.