Data Sheet

2

Rev. 2.3, 2008-03-10

TLE 4274 / 3.3V;2.5V

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 includes a number of internal circuits for protection against:

•

Overload

•

Overtemperature

•

Reverse polarity

Figure 1

Pin Configuration (top view)

Table 1

Pin Definitions and Functions

Pin No.

Symbol

Function

1I

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

2, 4

GND

Ground; PG-TO252-3-11: internally connected to heatsink

3Q

Output; block to ground with capacitor

C

AEP02561

13

Ι

Q

GND

1

2

3

4

Ι

GND

GND

AEP02282

Q

PG-SOT223-4

PG-TO252-3-11 (D-PAK)