TLE4275 데이터 시트보기 (PDF) - Infineon Technologies

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TLE4275

5-V Low Drop Fixed Voltage Regulator

Infineon Technologies 

TLE 4275

Dimensioning Information on External Components

The input capacitor CI is necessary for compensation of line influences. Using a resistor

of approx. 1 Ω 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 ≤ 5 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

Data Sheet

2

Rev. 1.7, 2007-02-19

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