Low Drop Voltage Regulator
TLE 4274
Features
•
•
•
•
•
•
•
•
•
•
Output voltage 5 V, 8.5 V or 10 V
Output voltage tolerance
≤ ±4%
Current capability 400 mA
Low-drop voltage
Very low current consumption
Short-circuit proof
Reverse polarity proof
Suitable for use in automotive electronics
Green Product (RoHS compliant) version of TLE 4274
AEC qualified
P-TO220-3-1
PG-TO220-3-1
^
Functional Description
P-TO252-3-11
The TLE 4274 is a low drop voltage regulator available in
a TO220, TO252 and TO263 package. The IC regulates
an input voltage up to 40 V to
V
Qrated
= 5.0 V (V50), 8.5 V
(V85) and 10 V (V10). The maximum output current is
400 mA. The IC is short-circuit proof and incorporates
temperature protection that disables the IC at
overtemperature. A 3.3 V and 2.5 V version is also
available. For information about the low output voltage
types please refer to the data sheet TLE 4274 / 3.3 V;
2.5 V.
PG-TO252-3-11
P-TO263-3-1
PG-TO263-3-1
Type
TLE 4274 V10
TLE 4274 V50
TLE 4274 V85
TLE 4274 DV50
TLE 4274 GV10
TLE 4274 GV50
TLE 4274 GV85
Data Sheet
Package
PG-TO220-3-1 (RoHS compliant)
PG-TO220-3-1 (RoHS compliant)
PG-TO220-3-1 (RoHS compliant)
PG-TO252-3-11 (RoHS compliant)
PG-TO263-3-1 (RoHS compliant)
PG-TO263-3-1 (RoHS compliant)
PG-TO263-3-1 (RoHS compliant)
1
Rev. 1.7, 2011-01-20
TLE 4274
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 damped. The output capacitor
C
Q
is necessary for the stability of the regulation circuit.
Stability is guaranteed at values
C
Q
≥
22
μF
and an ESR of
≤
3
Ω
within the operating
temperature range.
Circuit Description
The control amplifier compares a reference voltage 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 includes a number of internal circuits for protection against:
•
•
•
Overload
Overtemperature
Reverse polarity
Data Sheet
2
Rev. 1.7, 2011-01-20
TLE 4274
PG-TO220-3-1
GND
PG-TO252-3-11
GND
PG-TO263-3-1
GND
1
2
3
GND
I
Q
1
2
3
PG-TO252-3-11.vsd
1
2
3
I
GND
Q
PG-TO263-3-1.vsd
I
GND
PG-TO220-3-1.vsd
Q
Figure 1
Table 1
Pin No.
1
2
3
TAB
I
Pin Configuration
(top view)
Pin Definitions and Functions
Symbol
GND
Q
-
Function
Input;
block to ground directly at the IC with a ceramic capacitor.
Ground
Output;
block to ground with a
≥
22
μF
capacitor, ESR
≤
3
Ω.
TAB;
connect to heatsink and GND to improve thermal
performance
Data Sheet
3
Rev. 1.7, 2011-01-20
TLE 4274
Table 2
Absolute Maximum Ratings
T
j
= -40 to 150
°C
Parameter
Input
Voltage
Current
Output
Voltage
Current
Ground
Current
Temperature
Junction temperature
Storage temperature
Symbol
Limit Values
Min.
Max.
45
–
40
–
100
150
150
V
–
V
–
mA
°C
°C
–
Internally limited
–
Internally limited
–
–
–
Unit
Test Condition
V
I
I
I
V
Q
I
Q
I
GND
T
j
T
stg
-42
–
-1.0
–
–
–
-50
Note: Maximum ratings are absolute ratings; exceeding any one of these values may
cause irreversible damage to the integrated circuit.
Table 3
Parameter
Operating Range
Symbol
Limit Values
Min.
Input voltage; V50, DV50,
V
I
GV50
Input voltage, V85, GV85
Input voltage, V10, GV10
Junction temperature
Thermal Resistance
Junction ambient
Junction ambient
Junction ambient
Junction case
5.5
9.0
10.5
-40
–
–
–
–
Max.
40
40
40
150
65
78
52
4
V
V
V
°C
K/W
K/W
K/W
K/W
–
–
–
–
TO220
1)
TO252
1)
TO263
1)
–
Unit
Remarks
V
I
V
I
T
j
R
thja
R
thja
R
thja
R
thjc
1) Worst case; regarding peak temperature, zero airflow mounted on PCB 80
×
80
×
1.5 mm
3
, 300 mm
2
heat sink
area.
Data Sheet
5
Rev. 1.7, 2011-01-20
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