Contents
Which is better a tantalum capacitor or an MLCC?
I can either use an MLCC (Multi-Layer Ceramic Capacitors) or Tantalum capacitor. I know the main drawback of MLCCs compared to tantalums is that the effective capacitance is reduced by applying DC voltage to them.
Is it possible to replace an electrolytic capacitor with MLCC?
In recent years, the productization of high-capacitance MLCCs of several dozen to over 100 µF has made it possible to replace tantalum and aluminum electrolytic capacitors.
Is there a difference between tantalum chip and Hi CV MLCC?
Tantalum chip and Hi CV MLCC have a large degree of overlap in available capacitance ratings in common footprints. As MLCC production increased, many applications converted from tantalum to MLCC for many filtering, bypass, and hold-up applications.
Why are tantalum capacitors used in buck converters?
For instance, some Buck converters that require enough ripple at the output to be stable. And lower ESL will react with cable capacitances to give unnecessary oscillations. Tantalum capacitors are best known for Volumetric efficiency and Cheap cost, but they are prone to failure due to surge currents.
Can a ceramic capacitor be used for decoupling?
While the use of ceramic caps for decoupling or output would be in general OK, their use as input caps, especially without the use of a resistor (as Peter Smith stated in a comment to his answer) can cause problems for some regulators in some configurations.
Is it safe to use tantalums for decoupling?
In addition, they have effectively zero capacitance above perhaps 400kHz (so if you need decoupling above this frequency, tantalums are no use anyway). There are times to use tantalums, but I only use them if I must.
How does tantalum affect the capacitance of a circuit?
Tantalum capacitors (TC) experience very little change in capacitance characteristics due to circuit DC voltage and/or temperature fluctuations, eliminating the need to verify the effective capacitance – unlike ceramic capacitors (MLCC).
Do you need board handling precautions when using tantalum capacitors?
In addition, board handling precautions typically required for ceramic capacitors during assembly are not needed when using tantalum capacitors.