Understanding linear regulators and their key performance parameters: Page 6 of 6

February 01, 2016 //By Sitthipong Angkititrakul and Dhananjay Singh
Understanding linear regulators and their key performance parameters
Sitthipong Angkititrakul and Dhananjay Singh, Intersil Corporationtakes a look at  key performance parameters of LDOs and their impact on delivering clean output voltage to the various devices inside an electronic system.
a tight noise specification. Consequently, it is not uncommon for an LDO to be added as an active filter to the output of an SMPS. This LDO must have high PSRR at the SMPS switching frequency.
 
LDOs are particularly suited to applications that require an output voltage regulated to slightly below the input voltage. While buck and boost converters have limitations on the maximum/minimum duty cycle, their output voltage will lose regulation with an input voltage that is close to the output voltage.

Conclusion
Though simple in concept and implementation, widely used LDOs perform a vital function in system power design. There are many factors that need to be considered to optimize a design, particularly at higher current levels. For mid- to high‑current applications,

Intersil’s ISL80510/05 provides balanced performance across all key LDO performance parameters: low dropout, transient performance, voltage accuracy and a near flat PSRR response across a wide range of frequencies.

References
 
Learn more about the ISL85010/05.
Get the ISL85010 datasheet.
Watch a video overview of the ISL85010/05 .

Design category: 

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