PRELIMINARY
CM3112
Application Information
Output Capacitor
Unlike other LDO regulators the CM3112 does not
require an output capacitor for stability. It is stable with
any capacitor from 0 to 10uF.
In first 3 figures the load step is applied with a rise time
of approximately 1us. Adding capacitance does not
improve the response.
Adding output capacitance will improve the very high
frequency transient response of the part. Figures 1-7
demonstrate the effect of output capacitance on a
10mA to 140mA transient load step.
The last three figures show the load step with a rise
time of about 200ns. While the 0.1uF capacitor does
not improve the response the 1uF capacitor decreases
the overall magnitude of the transient spike.
Figure: 2
Figure: 5
Figure: 6
Figure: 7
Figure: 3
Figure: 4
© 2004 California Micro Devices Corp. All rights reserved.
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CALMIRCO [ CALIFORNIA MICRO DEVICES CORP ]
