TLE4274 Datasheet, PDF (2/12 Pages) Siemens Semiconductor Group – Low-Drop Voltage Regulator

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
P-SOT223-4-1
Ι1
GND 2 4 GND
Q3
AEP02282
P-TO252-3-1 (D-PAK)
GND
1
3
Ι
Q
AEP02561
Figure 1 Pin Configuration (top view)
Table 1
Pin No.
1
2, 4
3
Pin Definitions and Functions
Symbol Function
I
Input; block to ground directly at the IC with a ceramic capacitor.
GND
Ground; P-TO252-3-1: internally connected to heatsink
Q
Output; block to ground with capacitor C_Q ≥ 10 µF, ESR ≤ 2.5 Ω
Data Sheet
2
Rev. 2.1, 2004-01-01