Datasheet

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
Q
≥ 10 µF, ESR ≤ 2.5 Ω
AEP02561
13
Ι Q
GND
1
2
3
4
Ι
GND
GND
AEP02282
Q
PG-SOT223-4
PG-TO252-3-11 (D-PAK)