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Input and Output Capacitor Sel
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2010-11-16
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ABSTRACT
When designing with switching regulators, application requirements determine how
much input an output capacitance is needed. There are a number of key concerns
which effect your selection. The electrical performance requirements of your design
play a big part in determining the amount of capacitance required. The transient
requirements of your system are very important. The load transient amplitude, voltage
deviation requirements, and capacitor impedance each affects capacitor selection.
Other important issues to consider are minimizing PCB area and capacitor cost.
When selecting input and output capacitance each design has specific requirements
which much be addressed. System requirements set hard limits for a design.
Depending on what you are trying to accomplish, the amount and type of capacitance
can vary.
When designing with switching regulators, application requirements determine how
much input an output capacitance is needed. There are a number of key concerns
which effect your selection. The electrical performance requirements of your design
play a big part in determining the amount of capacitance required. The transient
requirements of your system are very important. The load transient amplitude, voltage
deviation requirements, and capacitor impedance each affects capacitor selection.
Other important issues to consider are minimizing PCB area and capacitor cost.
When selecting input and output capacitance each design has specific requirements
which much be addressed. System requirements set hard limits for a design.
Depending on what you are trying to accomplish, the amount and type of capacitance
can vary.
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