FA12 查看數據表（PDF） - California Micro Devices Corp

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FA12

150mA/1.2V CMOS LDO Regulator with Power Good

California Micro Devices Corp 

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.

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.

In first 3 figures the load step is applied with a rise time

of approximately 1us. Adding capacitance does not

improve the response.

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: 3

Figure: 6

Figure: 4

Figure: 7

© 2004 California Micro Devices Corp. All rights reserved.

12

430 N. McCarthy Blvd., Milpitas, CA 95035-5112

L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com 01/20/04

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