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Engineers can use TI’s low-noise, low-ripple buck converters to achieve efficient operation for noise-sensitive applications

Dallas, October 21, 2020/PRNewswire/ - Texas Instruments (TI) (NASDAQ: TXN) today introduced a new low-noise DC/DC switch stabilizer with integrated ferrite bead compensation Press series. TPS62912 and TPS62913 provide low noise of 20 µVRMS and ultra-low output voltage ripple of 10 µVRMS for frequencies from 100 Hz to 100 kHz, enabling engineers to remove one or more low-dropout regulators (LDO) from their designs, Reduce up to 76% of power loss and save 36% of board space. For more information, please visit www.ti.com/TPS62912-pr and www.ti.com/TPS62913-pr.

In many high-precision test and measurement, medical, aerospace and defense, and wireless infrastructure applications, noise in the power supply is a key design challenge. The traditional low-noise power architecture includes a DC/DC converter; low-noise LDOs, such as TPS7A52, TPS7A53, or TPS7A54; and off-chip filters, such as ferrite beads. By integrating ferrite bead compensation, TPS62912 and TPS62913 use ferrite beads that already exist in most systems as a filter to effectively filter high-frequency noise, reducing power supply output voltage ripple by about 30 dB and simplifying power supply design . To understand how a low-noise buck converter works, read the technical article "Using a low-noise buck converter to minimize noise and ripple."

TI will showcase TPS62913 on the virtual booth of the electronic virtual conference held from November 9th to 12th, 2020. For more information, please visit https://www.ti.com/about-ti/trade-shows/electronica.html.

High-precision systems require power rails with low noise and low ripple to maintain signal accuracy and integrity. TPS62912 and TPS62913 have both, and have a power supply rejection ratio of 65 dB at frequencies up to 100 kHz. In addition, the output voltage error of the step-down converter series is less than 1%, which helps to ensure strict output voltage accuracy. Both converters support the use of spread spectrum frequency modulation to further attenuate RF spurs and allow synchronization with external clocks, so engineers can easily meet their signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR) goals, which are It is essential in applications such as medical imaging or radar.

Maximize efficiency while reducing power loss

Historically, engineers have faced a trade-off between noise and efficiency when powering sensitive analog circuits. Using a switching regulator alone will cause excessive switching noise, and adding a post-regulator LDO to reduce noise will cause additional power loss, especially at high load currents. With 97% peak efficiency, the TPS62912 and TPS62913 allow engineers to design noise filtering without an LDO, reducing power loss by up to 76%-1.8 W in analog front-end (AFE) designs, and in designs using LDOs Reduce 1.5 W wideband analog-to-digital converter (ADC), such as ADC12DJ5200RF. Compared with the traditional low-noise power architecture, this means that the efficiency is increased by 20% and 15%, respectively. Read the application note "Using the TPS62913 Low Ripple and Low Noise Buck Converter to Power Noise Sensitive ADCs" to learn more.

Save board space and overall system cost

By using TPS62912 or TPS62913 in their designs, engineers can not only eliminate linear regulators, but also related passive components, which can save approximately 20 mm2 of printed circuit board (PCB) area for each LDO. Usually a design using a single LDO can save 36% of PCB space. In addition, the integrated ferrite bead compensation of the buck converter can help engineers reduce the overall number of DC/DC components and eliminate two capacitors and two resistors from their designs, thereby further reducing overall system costs and shortening design time .

Pre-production quantities of the 2-A TPS62912 and 3-A TPS62913 are now only available on TI.com, in a 2 mm x 2 mm, 10-pin quad flat no-lead (QFN) package. With 1,000 pieces as the unit, prices start at US$1.06 and US$1.16, respectively. The TPS62912EVM and TPS62913EVM evaluation modules are available on TI.com for $49. There are multiple payment and shipping options on TI.com. TI expects both devices to be mass-produced in the first quarter of 2021.

Texas Instruments (NASDAQ: TXN) is a global semiconductor company that designs, manufactures, tests, and sells analog and embedded processing chips for the industrial, automotive, personal electronics, communications equipment, and enterprise systems markets. Our enthusiasm for making electronic products more affordable through semiconductors to create a better world still exists today, because each generation of innovation is built on the basis of the last generation, making our technology smaller, more efficient, more reliable and more affordable—— Make it possible for semiconductors to enter ubiquitous electronic products. We think this is engineering progress. This is what we have done and have been doing for decades. Learn more on TI.com.

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