TLE 4274

Semiconductor Group

2

1998-11-01

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)

Figure 1

Pin Definitions and Functions

Pin No.

Symbol

Function

1

I

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

capacitor.

2GND

Ground

3Q

Output; block to ground with a

≥ 22 µF capacitor.

GND

AEP01957

Ι

Q

P-TO220-3-1

P-TO263-3-1

GND

Ι

Q

AEP02281

P-TO252-3-1

AEP02512

Ι

GND

Q