JZJIANG
Junior Member level 1
Hi,
I've just designed an LDO which requires a low ESL output capacitor (1~4.7uF) to offer high PSRR at high frequencies and good transient response.
I have completed the preliminary testing with a stacked SMD MLCC capacitor (4.7uF with a resonant frequency at ~1MHz), can anyone give some comments on this type of capacitor?
It seems that the three terminal feedthrough capacitor can achieve a much higher resonant frequency (~8MHz for 4.7uF capacitor). However, the feedthrough capacitor is typically used as bypassing capacitor, my question is, can it be used as the output capacitor of LDO?
There are also other types of low SEL capacitor such as the reversed geometry capacitor, and the multiple-terminal capacitor, etc. Anyone have ever used these capacitors, or have any comments on these capacitors?
Thank you in advance.
I've just designed an LDO which requires a low ESL output capacitor (1~4.7uF) to offer high PSRR at high frequencies and good transient response.
I have completed the preliminary testing with a stacked SMD MLCC capacitor (4.7uF with a resonant frequency at ~1MHz), can anyone give some comments on this type of capacitor?
It seems that the three terminal feedthrough capacitor can achieve a much higher resonant frequency (~8MHz for 4.7uF capacitor). However, the feedthrough capacitor is typically used as bypassing capacitor, my question is, can it be used as the output capacitor of LDO?
There are also other types of low SEL capacitor such as the reversed geometry capacitor, and the multiple-terminal capacitor, etc. Anyone have ever used these capacitors, or have any comments on these capacitors?
Thank you in advance.
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