Data Sheet Rev. 2.3
1
2002-12-21
Functional Description
The TLE 4264-2 is a monolithic integrated low-drop fixed voltage regulator which can
supply loads up to 150 mA. It is functional compatible to the TLE 4264, but has a
reduced quiescent current of typ. 40
A. The TLE 4264-2 is especially designed for all
applications which require very low quiescent currents. The device is available in the
small surface mounted P-SOT223-4-1 package. The device is pin compatible to the
TLE 4264. The regulator is designed to supply microprocessor systems under the
severe condition of automotive applications and is therefore equipped with additional
protection against overload, short-circuit and overtemperature. Of course the
TLE 4264-2 can be used in all other applications, wherever a stabilized voltage is
required.
An input voltage
V
I
in the range of 5.5 V <
V
I
< 45 V is regulated to
V
Q,nom
= 5 V with an
accuracy of
3%. An accuracy of 2% is kept for a load current range up to 50 mA.
The device operates in the temperature range of
T
j
= 40 to 150
C.
5-V Low-Drop Fixed-Voltage Regulator
SOT-223
Features
Output voltage tolerance
3% ( 2% up to 50 mA)
150 mA current capability
Low-drop voltage
Very low current consumption: 40 A
Overtemperature protection
Short-circuit proof
Suitable for use in automotive electronics
Reverse polarity proof
Type
Ordering Code Package
TLE 4264-2 G
Q67006-A9483
P-SOT223-4-6
P-SOT223-4-4
TLE 4264-2
TLE 4264-2
Data Sheet Rev. 2.3
2
2002-12-21
Figure 1
Pin Configuration (top view)
Figure 2
Pin Configuration (top view) (cont`d)
Pin Definitions and Functions
Pin
Symbol
Function
1
I
Input voltage; block to ground directly with a ceramic
capacitor
2, 4
GND
Ground
3
Q
5-V output voltage; block to ground with a capacitor
C
Q
10 F, ESR 4
P-SOT223-4
AEP02868
1
2
3
4
GND
Q
GND
TLE 4264-2
Data Sheet Rev. 2.3
3
2002-12-21
Circuit Description
The control amplifier compares a reference voltage, which is kept highly precise by
resistance adjustment, to a voltage that is proportional to the output voltage and drives
the base of the series transistor via a buffer. Saturation control, working as a function of
load current, prevents any over-saturation of the power element. The IC is additionally
protected against overload, overtemperature and reverse polarity.
Figure 3
Block Diagram
Saturation
Control and
Protection
Temperature
Sensor
Adjustment
Bandgap
Reference
Q
GND
Input
GND
Output
AEB02870
Circuit
Amplifier
Control
Buffer
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