Datasheet

TPS7A41
www.ti.com SBVS183 –DECEMBER 2011
INPUT AND OUTPUT CAPACITOR REQUIREMENTS
The TPS7A4101 high voltage linear regulator achieves stability with a minimum output capacitance of 4.7 µF and
input capacitance of 1 µF; however, it is highly recommended to use 10-μF output and input capacitors to
maximize ac performance.
BYPASS CAPACITOR REQUIREMENTS
Although a bypass capacitor (C
BYP
) is not needed to achieve stability, it is highly recommended to use a 10-nF
bypass capacitor to maximize ac performance (including line transient, noise and PSRR).
MAXIMUM AC PERFORMANCE
In order to maximize line transient, noise, and PSRR performance, it is recommended to include 10-μF (or
higher) input and output capacitors, and a 10-nF bypass capacitor; see Figure 12. The solution shown delivers
minimum noise levels of 58 μV
RMS
and power-supply rejection levels above 36 dB from 10 Hz to 10 MHz.
TRANSIENT RESPONSE
As with any regulator, increasing the size of the output capacitor reduces over/undershoot magnitude but
increases duration of the transient response.
Note that the presence of the C
BYP
capacitor may greatly improve the TPS7A4101 line transient response, as
noted in .
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