Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

What does power-supply ripple rejection (PSRR) mean for an LDO regulator?

April 26, 2017LDO mean psrr regulator rejection Ripple

0

Posted

What does power-supply ripple rejection (PSRR) mean for an LDO regulator?

1 Answer

0

Posted

Power-supply ripple rejection (PSRR) is a measure of the LDOs ability to prevent output-voltage fluctuations caused by variations in input voltage. PSRR is usually specified at a specific frequency, such as 60-dB rejection at 120 Hz. Low-ESR output capacitors and added bypass capacitors improve the PSRR performance. Battery-based systems should use an LDO that maintains high PSRR at low battery voltages.