Voltage Regulator
TLE 4274 / 3.3V;2.5V
Features
•
•
•
•
•
•
•
•
Output voltage: 3.3 V/2.5 V
±
4%
Current capability 400 mA
Very low current consumption
Short-circuit proof
Reverse polarity proof
Suitable for use in automotive electronics
Green Product (RoHS compliant)
AEC Qualified
P-SOT223-4
Functional Description
The TLE 4274 / 3.3V;2.5V is a voltage regulator available
in a SOT223 and TO252 package. The IC regulates an
input voltage up to 40 V to
V
Qrated
= 3.3 V/2.5 V. The
maximum output current is 400 mA. The IC is short-
circuit proof and has a shutdown circuit protecting it
against overtemperature. The TLE 4274 is also available
as 5 V, 8.5 V and 10 V version. Please refer to the data
sheet 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 for capacities
C
Q
≥
10
µF
with an ESR of
≤
2.5
Ω
within the
operating temperature range.
P-TO252-3-1
Type
TLE 4274 GSV33
TLE 4274 DV33
TLE 4274 GSV25
Data Sheet
1
Package
PG-SOT223-4
PG-TO252-3-11
PG-SOT223-4
Rev. 2.3, 2008-03-10
TLE 4274 / 3.3V;2.5V
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
PG-TO252-3-11 (D-PAK)
PG-SOT223-4
GND
Ι
GND
Q
1
2
3
AEP02282
4
GND
1
Ι
Q
AEP02561
3
Figure 1
Table 1
Pin No.
1
2, 4
3
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;
PG-TO252-3-11: internally connected to heatsink
Output;
block to ground with capacitor
C
Q
≥
10
µF,
ESR
≤
2.5
Ω
Data Sheet
2
Rev. 2.3, 2008-03-10
TLE 4274 / 3.3V;2.5V
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
Input voltage
Junction temperature
Thermal Resistance
Junction ambient
Junction ambient
Junction case
Junction case
Operating Range
Symbol
Limit Values
Min.
Max.
40
150
100
70
25
4
V
°C
K/W
K/W
K/W
K/W
–
–
SOT223
1)
TO252
2)
SOT223
TO252
4.7
-40
–
–
–
–
Unit
Remarks
V
I
T
j
R
thja
R
thja
R
thjc
R
thjc
1) Soldered in, 1 cm
2
copper area at pin 4, FR4
2) Soldered in, minimal footprint, FR4
Data Sheet
4
Rev. 2.3, 2008-03-10
TLE 4274 / 3.3V;2.5V
Table 4
Characteristics
V
I
= 6 V; -40
°C
<
T
j
< 150
°C
(unless otherwise specified)
Parameter
Output voltage
V33-Version
Output voltage
V33-Version
Output voltage
V25-Version
Output voltage
V25-Version
Output current
limitation
1)
Symbol
Limit Values
Min.
Typ.
3.3
3.3
2.5
2.5
600
100
8
20
0.7
1.0
40
10
60
0.5
Max.
3.44
3.44
2.6
2.6
–
220
15
30
1.2
2.0
70
25
–
–
V
V
V
V
mA
µA
mA
mA
V
V
mV
mV
dB
mV/K
5 mA <
I
Q
< 400 mA
4.7 V <
V
I
< 28 V
5 mA <
I
Q
< 200 mA
4.7 V <
V
I
< 40 V
5 mA <
I
Q
< 400 mA
4.7 V <
V
I
< 28 V
5 mA <
I
Q
< 200 mA
4.7 V <
V
I
< 40 V
–
3.17
3.17
2.4
2.4
400
–
–
–
–
–
–
–
–
–
Unit
Measuring Condition
V
Q
V
Q
V
Q
V
Q
I
Q
Current consumption;
I
q
I
q
=
I
I
-
I
Q
Current consumption;
I
q
I
q
=
I
I
-
I
Q
Current consumption;
I
q
I
q
=
I
I
-
I
Q
Drop voltage
1)
V33-Version
Drop voltage
1)
V25-Version
Load regulation
Line regulation
Power supply ripple
rejection
Temperature output
voltage drift
I
Q
= 1 mA
I
Q
= 250 mA
I
Q
= 400 mA
I
Q
= 300 mA
V
dr
=
V
I
-
V
Q
I
Q
= 300 mA
V
dr
=
V
I
-
V
Q
I
Q
= 5 mA to 300 mA;
V
I
= 6 V
∆
V
l
= 12 V to 32 V
I
Q
= 5 mA
f
r
= 100 Hz;
V
r
= 0.5 Vpp
–
V
dr
V
dr
∆
V
Q
∆
V
Q
PSRR
d
V
Q
/d
T
1) Measured when the output voltage
V
Q
has dropped 100 mV from the nominal value obtained at
V
I
= 6 V.
Data Sheet
5
Rev. 2.3, 2008-03-10
Embedded System
京公网安备 11010802033920号
EEWORLD
