Industry's first low-noise buck converters with integrated ferrite-bead compensation simplify high-precision designs

12/08/2020

Texas Instruments (TI) introduced a new family of low-noise DC/DC switching regulators with integrated ferrite-bead compensation. The TPS62912 and TPS62913 offer low noise of 20 µVRMS for frequencies ranging from 100 Hz to 100 kHz and ultra-low output-voltage ripple of 10 µVRMS, giving engineers the ability to remove one or more low-dropout regulators (LDOs) from their designs, reduce power losses by up to 76% and save 36% of board space.

Noise in the power supply is a key design challenge in many high-precision test and measurement, medical, aerospace and defense, and wireless infrastructure applications. A traditional low-noise power-supply architecture includes a DC/DC converter; a low-noise LDO such as the TPS7A52, TPS7A53 or TPS7A54; and an off-chip filter, such as a ferrite bead. By integrating ferrite-bead compensation, the TPS62912 and TPS62913 use the ferrite bead already present in most systems as an effective filter against high-frequency noise, reducing the power supply output voltage ripple by approximately 30 dB and simplifying the power supply design.

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