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You CAN have both - low noise AND high efficiency

For noise-critical portable applications, such as GPS receivers, connectivity, and sensing, power supply designers always had to choose between longer battery run time (from higher efficiency) or higher signal chain performance (from the increased sensor sensitivity possible with a quieter power supply). For line-powered industrial or communications equipment applications, designers have been forced to dissipate significant amounts of power in LDOs to achieve the desired noise performance. Achieving both low noise and high efficiency was impossible. Now for personal electronics, industrial, communications equipment, or medical applications, this has changed. New advances in low-noise DC/DC converters as well as LDOs provide low enough noise with high efficiency.

1. Why place an LDO after a DC/DC?

Understand the performance and tradeoffs of the traditional low noise and high efficiency approach of using a DC/DC followed by an LDO.  Visualize other systems that could use the same approach, with the appropriate DC/DCs and LDOs in different packages and with different features.

# Title Duration
1.1 Why place an LDO after a DC/DC?
You CAN achieve both low noise and high efficiency to make your portable or line powered device run better. The tried and true DC/DC followed by an LDO...
15:26
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2. A deep dive into the DC/DC + LDO approach

Understand the performance and trade-offs of the traditional low noise and high efficiency approach of using a DC/DC followed by an LDO, through a deep dive into TIDA-01566. The size, quiescent current, efficiency, temperature rise, noise, and adaptability of three different approaches are compared: DC/DC + LDO, DC/DC only, and LDO only.

# Title Duration
2.1 Deep Dive into the Light Load Efficient, Low Noise Power Supply Reference Design for Wearables and IoT (TIDA-01566)
You CAN achieve both low noise and high efficiency to make your portable device run better. The tried and true DC/DC followed by an LDO works.
17:37
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3. Lower noise for a negative output voltage rail

What you will learn in this webinar:

  • How to achieve a low noise at a negative output voltage with the inverting buck topology
  • Understanding how the buck output stage and filtered reference voltage attenuate noise
  • The elimination of LDOs when powering data converters by utilizing these low-noise features
# Title Duration
3.1 Lower noise for a negative output voltage rail
You can have BOTH low noise and high efficiency on a negative voltage with just a DC/DC and no LDO.
05:46
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