LM1084 5V Schaltung

Fank schrieb:
> ist das jetzt für den 5V Regler das selbe? nur eben mit der höheren
> Eingangsspannung?

JaNein, ER funst halt nur innerhalb seiner Specs....
Wenn notwendig, eher LoESR. ABER, nur keine Panik :)
Bei Last lieber Cap. als Induktiv....

"
Stability consideration primarily concerns the phase response of the 
feedback loop. In order for stable operation,
the loop must maintain negative feedback. The LM1084 requires a certain 
amount series resistance with
capacitive loads. This series resistance introduces a zero within the 
loop to increase phase margin and thus
increase stability. The equivalent series resistance (ESR) of solid 
tantalum or aluminum electrolytic capacitors is
used to provide the appropriate zero (approximately 500 kHz).
Aluminum electrolytics are less expensive than tantalums, but their ESR 
varies exponentially at cold
temperatures; therefore requiring close examination when choosing the 
desired transient response over
temperature. Tantalums are a convenient choice because their ESR varies 
less than 2:1 over temperature.
The recommended load/decoupling capacitance is a 10-uF tantalum or a 
50-uF aluminum. These values will
assure stability for the majority of applications.
The adjustable versions allow an additional capacitor to be used at the 
ADJ pin to increase ripple rejection. If this
is done the output capacitor should be increased to 22 uF for tantalum 
or to 150 uF for aluminum.
Capacitors other than tantalum or aluminum can be used at the adjust pin 
and the input pin. A 10-uF capacitor is
a reasonable value at the input. See Ripple Rejection section regarding 
the value for the adjust pin capacitor.
"