Date: 04/04/2012

1 Amp switching regulator from TI reduces noise by 99%

Texas Instruments announced the new QuietSupply step-down supply regulator that reduces switching noise by 99 percent, increases system performance in noise-sensitive designs.

The need of smooth and quiet power sources to operate at peak performance in noise-sensitive medical, industrial and telecom designs has made TI introduce a new class of voltage regulators with lowest-noise 1-A switching power supply without sacrificing efficiency and power performance.

The TPS54120 family of QuietSupply regulators reduces switching noise, helps maximize the performance of precision data converters and amplifiers and sensitive clock distribution circuits used in applications, such as telecommunications, test equipment, and high-end audio and video equipment.

Key features
99-percent noise reduction: 9 uVRMS at 100 Hz to 100 kHz, and 17 uVRMS at 100 Hz to 1 MHz
Performance: Power supply rejection ratio (PSRR) of 83 dB at 10 kHz, 70 dB at 100 kHz
Design flexibility: Synchronizable to external clock from 200 kHz to 1.2 MHz
Input voltage range of 4.5 V to 17 V, adjustable output of 0.8 V to 6.0 V

TI also offers a large selection of low dropout linear regulator ICs such as TPS7A8101, TPS7A3001, TPS7A4901 and the ultra-low noise LP5900 and LP8900.

The TPS54120 is available in volume now in a thermally enhanced 3.5-mm x 5.5-mm, 24-pin QFN package, and has a suggested resale price of $1.95 each in 1,000-unit quantities. The easy-to-use TPS54120EVM-103 contains all of the external components required for a low noise, 1-A solution with internal thermal and current limit shutdowns, power good output monitor, tracking and enabling/disabling circuitry.

For more information, visit: www.ti.com