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

T

exas 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. To learn how low-noise buck converters work, read the technical article, Minimize noise and ripple with a low-noise buck converter.

TI will demonstrate the TPS62913 in its virtual booth at the electronica virtual conference, Nov. 9-12, 2020. For more information, go to https//www.ti.com/about-ti/trade-shows/electronica.html.

Easily minimize power-supply noise

High-precision systems require supply rails with low noise and low ripple to preserve signal accuracy and integrity. The TPS62912 and TPS62913 offer both, along with a power-supply rejection ratio of 65 dB at up to 100 kHz. In addition, this buck converter family has an output-voltage error of less than 1%, which helps ensure tight output-voltage accuracy. Both converters enable the use of spread-spectrum frequency modulation to further attenuate radio-frequency spurs and allow synchronization to an external clock so engineers can easily meet their signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR) targets, which are critical in applications such as medical imaging or radar.

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

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