TLE4274 Datasheet PDF - Infineon


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TLE4274
Infineon

Part Number TLE4274
Description Low Drop Voltage Regulator
Page 16 Pages

TLE4274 datasheet pdf
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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
Functional Description
The TLE 4274 is a low drop voltage regulator availablewww.DataSheet.net/ in
a TO220, TO252 and TO263 package. The IC regulates
an input voltage up to 40 V to VQrated = 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.
P-TO220-3-1
PG-TO220-3-1
P-TO252-3-11
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
Datasheet pdf - http://www.DataSheet4U.co.kr/



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TLE 4274
Dimensioning Information on External Components
The input capacitor CI is necessary for compensating line influences. Using a resistor of
approx. 1 Ω in series with CI, the oscillating of input inductivity and input capacitance can
be damped. The output capacitor CQ is necessary for the stability of the regulation circuit.
Stability is guaranteed at values CQ 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
www.DataSheet.net/
Data Sheet
2 Rev. 1.7, 2011-01-20
Datasheet pdf - http://www.DataSheet4U.co.kr/



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TLE 4274
PG-TO220-3-1
GND
123
PG-TO252-3-11
GND
PG-TO263-3-1
GND
12 3
GND
IQ
PG-TO252-3-11.vsd
123
I GND Q
PG-TO263-3-1.vsd
IQ
GND
www.DataSheet.net/
Figure 1
PG-TO220-3-1.vsd
Pin Configuration (top view)
Table 1
Pin No.
1
2
3
TAB
Pin Definitions and Functions
Symbol Function
I Input; block to ground directly at the IC with a ceramic capacitor.
GND
Ground
Q 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
Datasheet pdf - http://www.DataSheet4U.co.kr/



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TLE 4274
Temperature
Sensor
1
Ι
Bandgap
Reference
Control
Amplifier
Saturation
Control and
Protection
Circuit
Buffer
3
Q
Figure 2 Block Diagram
www.DataSheet.net/
2
GND
AEB01959
Data Sheet
4 Rev. 1.7, 2011-01-20
Datasheet pdf - http://www.DataSheet4U.co.kr/




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