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TLE4276V85 Datasheet(PDF) 2 Page - Infineon Technologies AG |
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TLE4276V85 Datasheet(HTML) 2 Page - Infineon Technologies AG |
2 / 20 page Data Sheet 2 Rev. 2.7, 2007-10-23 TLE 4276 Functional Description The TLE 4276 is a low-drop voltage regulator in a TO package. The IC regulates an input voltage up to 40 V to V Q,nom = 5.0 V (V50), 8.5 V (V85), 10 V (V10) and adjustable voltage (V). The maximum output current is 400 mA. The IC can be switched off via the inhibit input, which causes the current consumption to drop below 10 µA. The IC is short-circuit- proof and includes temperature protection which turns off the device at overtemperature. Dimensioning Information on External Components The input capacitor C I is necessary for compensation of line influences. Using a resistor of approx. 1 Ω in series with C I, the oscillating of input inductivity and input capacitance can be damped. The output capacitor C Q is necessary for the stability of the regulation circuit. Stability is guaranteed at values C Q ≥ 22 µF and an ESR of ≤ 3 Ω 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 incorporates a number of internal circuits for protection against: • Overload • Overtemperature • Reverse polarity |
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