The TLE4275 is a monolithic integrated low-dropout voltage regulator offered in a 5-pin
TO package. The device regulates an input voltage up to 45 V to
VOUT = 5 V (typ). The device can drive loads up to 450 mA and is
short-circuit proof. At overtemperature, the incorporated temperature protection turns off the
TLE4275. The device generates a reset signal for an output voltage, VOUT,rt,
of 4.65 V (typ). By the use of an external delay capacitor, one can program the reset delay
The input capacitor, CIN, compensates for line fluctuation. Using
a resistor of approximately 1 Ω in series with CIN dampens the oscillation
of input inductance and input capacitance. The output capacitor, COUT,
stabilizes the regulation circuit. The specification for stability is at
COUT ≥ 22 µF and ESR ≤ 5 Ω, within the operating temperature range.
Stability for electrolytic capacitors specifically is at COUT ≥ 68 µF within
the operating temperature range. See the application report on low-temperature stability,
SLVA501, for further details.
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 through a buffer. Saturation
control as a function of the load current prevents any oversaturation of the power element. The
device also incorporates a number of internal circuits for protection against: Overload, Overtemperature, and Reverse Polarity.
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