Siemens TLE4264G Datasheet
TLE 4264 G
5-V Low-Drop Fixed-Voltage Regulator
TLE 4264 G
Features
● Output voltage tolerance ≤ ± 2 %
● Low-drop voltage
● Very low current consumption
● Overtemperature protection
● Short-circuit proof
● Suitable for use in automotive electronics
● Reverse polarity
P-SOT223-4-1
Type Ordering Code Package
TLE 4264 G Q67006-A9139 P-SOT223-4-1 (SMD)
Functional Description
TLE 4264 G is a 5-V low-drop fixed-voltage regul ator in an SOT-223 package. The IC
regulates an input voltage
in the range 5.5 V < VI < 45 V to V
I
= 5.0 V. The
Qrated
V
maximum output current is more than 120 mA. This IC is shortcircuit-proof and features
temperature protection that disables the circuit at overtemperature.
Dimensioning Information on External Components
C
The input capacitor
approx. 1 Ω in series with
be clamped. The output capacitor
circuit. Stability is guaranteed at values
is necessary for compensating line influences. Using a resistor of
i
C
, the oscillating of input inductivity and input capacitance can
i
C
is necessary for the stability of the regulating
Q
C
≥ 10 µF and an ESR ≤ 10 Ω within the
Q
operating temperature range.
Semiconductor Group 1 1998-11-01
Pin Configuration
(top view)
TLE 4264 G
4
123
V
Pin Definitions and Functions
Pin Symbol Function
1
V
I
Input voltage; block to ground directly on IC with
ceramic capacitor
2, 4 GND Ground
3
V
Q
5-V output voltage; block to ground with ≥ 10-µF
capacitor, ESR < 10 Ω
Circuit Description
GND
V
QΙ
AEP01526
The control amplifier compares a reference voltage, which is kept highly precise by
resistance adjustment, to a voltag e t hat is proporti onal to the o utput v oltage and d rives
the base of the series transistor via a buffer. Saturation control, working as a function of
load current, prevents any over-sat uration of the power element . The IC is additionally
protected against overload, overtemperature and reverse polarity.
Semiconductor Group 2 1998-11-01
Temperature
Sensor
TLE 4264 G
Saturation
Control and
Protection
Circuit
Input
2,4
GND
AEB01527
3
Output
1
Control
Adjustment
Amplifier
Bandgap
Reference
Buffer
Block Diagram
Semiconductor Group 3 1998-11-01
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