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TLE4274

Low-Drop Voltage Regulator

Siemens AG 

TLE 4274

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

Pin Configuration (top view)

P-TO220-3-1

P-TO252-3-1

P-TO263-3-1

GND

Ι

Q

AEP02512

Ι GND Q

AEP02281

Figure 1

Ι GND Q

AEP01957

Pin Definitions and Functions

Pin No. Symbol Function

1

I

Input; block to ground directly at the IC with a ceramic

capacitor.

2

GND

Ground

3

Q

Output; block to ground with a ≥ 22 µF capacitor.

Semiconductor Group

2

1998-11-01

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