Semiconductor Group
1
1998-11-01
Functional Description
TLE 4265 is a 5-V low-drop voltage regulator in a TO220-5 package. Maximum input
voltage is 45 V. It can produce an output current of > 200 mA. The IC is shortcircuit-proof
and thermal protected.
Application
The IC regulates an input voltage
V
I
in the range 6 V <
V
I
< 45 V to
V
Qrated
= 5.0 V. A reset
signal is generated for an output voltage
V
Q
of < 4.5 V. The reset delay can be set with
an external capacitor. This voltage regulator is especially suitable for microprocessor
applications in automobiles.
Type
Ordering Code
Package
TLE 4265
Q67000-A9138
P-TO220-5-1
TLE 4265S
Q67000-A9277
P-TO220-5-2
5-V Low-Drop Voltage Regulator
Bipolar IC
Features
q
Output voltage tolerance
2 %
q
Low-drop voltage
q
Very low standby current consumption
q
Overtemperature protection
q
Reverse polarity protection
q
Short-circuit proof
q
Setable reset threshold
q
Wide temperature range
q
Suitable for use in automotive electronics
P-TO220-5-1
P-TO220-5-2
TLE 4265
TLE 4265
Semiconductor Group
2
1998-11-01
Pin Configuration
(top view)
Pin Definitions and Functions
Pin
Symbol
Function
1
V
I
Input voltage; block direct on IC with ceramic capacitor to GND
2
QRES
Reset output; open-collector output connected to output across
resistor of 30 k
3
GND
Ground
4
DRES
Reset delay; wire with capacitor to GND for setting delay
5
V
Q
5-V output voltage; block to GND with 22-
F capacitor
AEP01492
1
2
3
4
5
V
QRES
GND
DRES
V
Q
P-TO220-5-1
P-TO220-5-2
TLE 4265
Semiconductor Group
3
1998-11-01
Circuit Description
The control amplifier compares a highly precise reference voltage, produced by resistor
alignment, to a voltage that is proportional to the output voltage and drives the base of
the series transistor via a buffer. A saturation control, a function of the load current,
prevents any over-saturating of the power element. If the output voltage drops below
4.5 V, the external reset-delay capacitor is discharged by the reset generator. If the
voltage on the capacitor reaches the lower threshold
V
ST
, a signal is triggered on the
reset output and not canceled again until the upper threshold
V
dT
is exceeded. The IC is
protected against overload, overtemperature and reverse polarity.
Saturation
Control and
Protection
Adjustment
Reset
Generator
Buffer
+
-
Control
Amplifier
Temperature
Sensor
Bandgap
Reference
1
5
4
2
Output
Reset
Delay
Reset
Output
In-
put
GND
3
AEB01493
TLE 4265
Semiconductor Group
4
1998-11-01
Block Diagram
Absolute Maximum Ratings
T
J
= 40 to 150
C
Parameter
Symbol
Limit Values
Unit Notes
min.
max.
Input
Input voltage
V
I
42
45
V
Reset Output
Voltage
V
R
0.3
42
V
Reset Delay
Voltage
V
d
0.3
42
V
Output
Output voltage
V
Q
0.3
7
V
Output current
I
Q
Limited internally
GND
Current
I
GND
0.1
A
Temperatures
Junction temperature
T
J
150
C
Storage temperature
T
stg
50
150
C
Operating Range
Input voltage
V
I
45
V
Junction temperature
T
J
40
150
C
TLE 4265
Semiconductor Group
5
1998-11-01
Optimum reliability and lifetime can be ensured in integrated circuits by not exceeding a
junction temperature of 125
C during operation. Although operation up to the maximum
permissible junction temperature of 150
C is possible, such boundary conditions, if
sustained, may affect device reliability.
Thermal Resistance
Junction ambient
R
thja
70
K/W
Junction-case
R
thjc
10
K/W
Characteristics
V
I
= 13.5 V;
T
J
= 25
C (unless specified otherwise)
Parameter
Symbol
Limit Values
Unit Test Condition
min.
typ.
max.
Output voltage
V
Q
4.9
5
5.1
V
5 mA
I
Q
150 mA
6 V
V
I
28 V
40
C
T
J
125
C
Output-current limiting
I
Q
200
250
mA
Current consumption
I
q
=
I
I
I
Q
I
q
750
1000
A
I
Q
= 0 mA
Current consumption
I
q
=
I
I
I
Q
I
q
10
15
mA
I
Q
= 150 mA
Current consumption
I
q
=
I
I
I
Q
I
q
15
20
mA
I
Q
= 150 mA
V
I
= 4.5 V
Drop voltage
V
Dr
0.35
0.5
V
I
Q
= 150 mA
1)
Load regulation
V
Q
25
mV
I
Q
= 5 to 150 mA
Absolute Maximum Ratings (cont'd)
T
J
= 40 to 150
C
Parameter
Symbol
Limit Values
Unit Notes
min.
max.
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