TLE 4266
5-V Low-Drop Voltage Regulator
TLE 4266
Bipolar IC
Features
q
q
q
q
q
q
q
q
Output voltage tolerance
≤ ±
2 %
Very low current consumption
Low-drop voltage
Overtemperature protection
Reverse polarity proof
Wide temperature range
Suitable for use in automotive electronics
Inhibit
P-SOT223-4-2
Type
TLE 4266 G
w
TLE 4266 GSV10
w
New type
Functional Description
Ordering Code
Q67006-A9152
Q67006-A9355
Package
P-SOT223-4-2 (SMD)
P-SOT223-4-2 (SMD)
TLE 4266 G is a 5-V low-drop voltage regulator in a P-SOT223-4-2 SMD package. The
IC regulates an input voltage
V
i
in the range of 5.5 V <
V
i
< 45 V to
V
Qrated
= 5 V / 10 V.
The maximum output current is more than 120 mA. The IC can be switched off via the
inhibit input, which causes the current consumption to drop below 10
µA.
The IC is
shortcircuit-proof and incorporates temperature protection that disables the IC an
overtemperature.
Dimensioning Information on External Components
The input capacitor
C
i
is necessary for compensating line influences. Using a resistor of
approx. 1
Ω
in series with
C
i
, the oscillating of input inductivity and input capacitance can
be clamped. The output capacitor
C
Q
is necessary for the stability of the regulating
circuit. Stability is guaranteed at values
C
Q
≥
10
µF
and an ESR
≤
10
Ω
within the
operating temperature range.
Semiconductor Group
1
1998-11-01
TLE 4266
Circuit Description
The control amplifier compares a reference voltage, which is kept highly accurate 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 as a function of the load
current prevents any oversaturation of the power element. The IC also incorporates a
number of internal circuits for protection against:
q
q
q
Overload
Overtemperature
Reverse polarity
Temperature
Sensor
1
Control
Amplifier
Adjustment
Bandgap
Reference
Saturation
Control and
Protection
Circuit
3
Output
Input
Buffer
2
Inhibit
4
GND
AEB01725
Block Diagram
Semiconductor Group
3
1998-11-01
TLE 4266
Characteristics
V
I
= 13.5 V; – 40
°C ≤
T
j
≤
125
°C
Parameter
Symbol
Limit Values
min.
Output voltage
Output voltage
GSV 10-version
Output-current
limitation
Current consumption
I
q
=
I
i
–
I
Q
Current consumption
I
q
=
I
i
–
I
Q
Current consumption
I
q
=
I
i
–
I
Q
Drop voltage
Load regulation
Supply-voltage
regulation
Supply-voltage
rejection
Inhibit
Inhibit on voltage
Inhibit off voltage
Inhibit current
typ.
5
10.0
150
0
–
10
0.25
–
15
54
max.
5.1
10.2
–
10
400
15
0.5
40
30
–
V
V
mA
µA
µA
mA
V
mV
mV
dB
5 mA
≤
I
Q
≤
100 mA
6 V
≤
V
i
≤
28 V
5 mA
≤
I
Q
≤
100 mA
6 V
≤
V
i
≤
28 V
–
Unit Test Condition
V
Q
V
Q
I
Q
I
q
I
q
I
q
V
Dr
∆
V
Q
∆
V
Q
4.9
9.8
120
–
–
–
–
–
–
–
V
e
= 0 V;
T
j
≤
100
°C
I
Q
= 1 mA
I
Q
= 100 mA
I
Q
= 100 mA
1)
I
Q
= 5 to 100 mA
V
i
= 6 V
V
I
= 6 V to 28 V
I
Q
= 5 mA
f
r
= 100 Hz
V
r
= 0.5
V
SS
SVR
V
e, on
V
e, off
I
e
–
0.8
5
–
–
15
3.5
–
25
V
V
µA
–
–
V
e
= 5 V
1) Drop voltage =
V
i
–
V
Q
(measured when the output voltage
V
Q
has dropped 100 mV from the
nominal value obtained at
V
i
= 13.5 V).
Semiconductor Group
5
1998-11-01
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