TLE 4266
Semiconductor Group
1
5-V Low-Drop Voltage Regulator
Bipolar IC
Features
q
Output voltage tolerance
2 %
q
Very low current consumption
q
Low-drop voltage
q
Overtemperature protection
q
Reverse polarity proof
q
Wide temperature range
q
Suitable for use in automotive electronics
q
Inhibit
w
New type
Functional Description
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. 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
A. 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
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
F and an ESR
10
within the
operating temperature range.
Type
Ordering Code
Package
w
TLE 4266 G
Q67006-A9152
P-SOT223-4-2
P-SOT223-4-2
TLE 4266
11.96
TLE 4266
Semiconductor Group
2
Pin Configuration
(top view)
Pin Definitions and Functions
Pin
Symbol
Function
1
V
I
Input voltage; block to ground directly at the IC with a ceramic
capacitor.
2
Inh
Inhibit; low-active input.
3
V
Q
5-V output voltage; block to ground with a
10
F capacitor.
4
GND
Ground
TLE 4266
Semiconductor Group
3
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
Overload,
q
Overtemperature,
q
Reverse polarity.
Block Diagram
TLE 4266
Semiconductor Group
5
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).
Characteristics
V
I
= 13.5 V; 40
C
T
j
125
C
Parameter
Symbol
Limit Values
Unit Test Condition
min.
typ.
max.
Output voltage
V
Q
4.9
5
5.1
V
5 mA
I
Q
100 mA
6 V
V
i
28 V
Output-current
limitation
I
Q
120
150
mA
Current consumption
I
q
=
I
i
I
Q
I
q
0
10
A
V
e
= 0 V;
T
j
100
C
Current consumption
I
q
=
I
i
I
Q
I
q
400
A
I
Q
= 1 mA
Current consumption
I
q
=
I
i
I
Q
I
q
10
15
mA
I
Q
= 100 mA
Drop voltage
V
Dr
0.25
0.5
V
I
Q
= 100 mA
1)
Load regulation
V
Q
40
mV
I
Q
= 5 to 100 mA
V
i
= 6 V
Supply-voltage
regulation
V
Q
15
30
mV
V
I
= 6 V to 28 V
I
Q
= 5 mA
Supply-voltage
rejection
SVR
54
dB
f
r
= 100 Hz
V
r
= 0.5
V
SS
Inhibit
Inhibit on voltage
V
e, on
3.5
V
Inhibit off voltage
V
e, off
0.8
V
Inhibit current
I
e
5
15
25
A
V
e
= 5 V
TLE 4266
Semiconductor Group
9
Package Outlines
P-SOT223-4-2 (SMD)
(Plastic Small Outline Transistor)
Weight approx. 0.15 g
GPS05560
Sorts of Packing
Package outlines for tubes, trays etc. are contained in our
Data Book "Package Information"
Dimensions in mm
SMD = Surface Mounted Device
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