Q67006-A9360 데이터 시트보기 (PDF) - Infineon Technologies

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Q67006-A9360

5-V Low-Drop Fixed Voltage Regulator

Infineon Technologies 

TLE 4270

Circuit Description

The control amplifier compares a reference voltage, which is kept highly accurate by

resistance adjustment, to a voltage that is proportional to the output voltage and drives

the base of a series transistor via a buffer. Saturation control as a function of the load

current prevents any over-saturation of the power element.

The IC also incorporates a number of internal circuits for protection against:

• Overload

• Overvoltage

• Overtemperature

• Reverse polarity

Application Description

The IC regulates an input voltage in the range of 5.5 V < VI < 36 V to VQnom = 5.0 V. Up

to 26 V it produces a regulated output current of more than 550 mA. Above 26 V the

save-operating-area protection allows operation up to 36 V with a regulated output

current of more than 300 mA. Overvoltage protection limits operation at 42 V. The

overvoltage protection hysteresis restores operation if the input voltage has dropped

below 36 V. A reset signal is generated for an output voltage of VQ < 4.5 V. The delay

for power-on reset can be set externally with a capacitor.

Data Sheet Version 1.1

3

2000-01-09

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