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| TLE4274_07 Datasheet, PDF (2/16 Pages) Infineon Technologies AG – Low Drop Voltage Regulator Output voltage 5 V, 8.5 V or 10 V | |||
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TLE 4274
Dimensioning Information on External Components
The input capacitor CI is necessary for compensating line influences. Using a resistor of
approx. 1 ⦠in series with CI, the oscillating of input inductivity and input capacitance can
be damped. The output capacitor CQ is necessary for the stability of the regulation circuit.
Stability is guaranteed at values CQ ⥠22 µF and an ESR of ⤠3 ⦠within the operating
temperature range.
Circuit Description
The control amplifier compares a reference voltage to a voltage that is proportional to the
output voltage and drives the base of the series transistor via a buffer. Saturation control
as a function of the load current prevents any oversaturation of the power element. The
IC also includes a number of internal circuits for protection against:
⢠Overload
⢠Overtemperature
⢠Reverse polarity
Data Sheet
2
Rev. 1.6, 2007-01-23
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