Type Package
TLE 4271-2 PG-TO220-7-11
TLE 4271-2 S PG-TO220-7-12
TLE 4271-2 G PG-TO263-7-1
5-V Low Drop Fixed Voltage Regulator
TLE 4271-2
^
P-TO220-7-11
P-TO220-7-12
P-TO263-7-1
Data Sheet 1 Rev. 2.7, 2007-06-25
Features
• Output voltage tolerance ≤ ±2%
• Low-drop voltage
• Integrated overtemperature protection
• Reverse polarity protection
• Input voltage up to 42 V
• Overvoltage protection up to 65 V (≤ 400 ms)
• Short-circuit proof
• Suitable for use in automotive electronics
• Wide temperature range
• Adjustable reset and watchdog time
• Green Product (RoHS compliant)
• AEC Qualified
Functional Description
The TLE 4271-2 is functional and electrical identical to
TLE 4271.
The device is a 5-V low drop fixed voltage regulator. The
maximum input voltage is 42 V (65 V, ≤400 ms). Up to
an input voltage of 26 V and for an output current up to
550 mA it regulates the output voltage within a 2%
accuracy. The short circuit protection limits the output
current of more than 650 mA. The IC can be switched off
via the inhibit input. An integrated watchdog monitors the
connected controller. The device incorporates
overvoltage protection and temperature protection that
disables the circuit at overtemperature.
Data Sheet 2 Rev. 2.7, 2007-06-25
TLE 4271-2
Figure 1 Pin Configuration (top view)
Table 1 Pin Definitions and Functions
Pin Symbol Function
1I Input; block to ground directly on the IC with ceramic capacitor.
2INH Inhibit
3RO Reset Output; the open collector output is connected to the
5 V output via an integrated resistor of 30 kΩ.
4GNDGround
5D Reset Delay; connect a capacitor to ground for delay time adjustment.
6WI Watchdog Input
7Q 5-V Output; block to ground with 22 µF capacitor, ESR < 3 Ω.
AEP01939
GNDINH
ΙRO
WI
DQ
17
GNDINH
Ι
RO
1
WI
AEP02017
DQ
7
AEP01938
INH
RO
GND
17
WI
D
ΙQ
PG-TO220-7-11 PG-TO220-7-12 PG-TO263-7-1
TLE 4271-2
Data Sheet 3 Rev. 2.7, 2007-06-25
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 a series transistor via a buffer. Saturation control as a function of the load
current prevents any over-saturation of the power element.
The reset output RO is in high-state if the voltage on the delay capacitor CD is greater or
equal VUD. The delay capacitor CD is charged with the current ID for output voltages
greater than the reset threshold VRT. If the output voltage gets lower than VRT (‘reset
condition’) a fast discharge of the delay capacitor CD sets in and as soon as VD gets
lower than VLD the reset output RO is set to low-level.
The time for the delay capacitor charge from VUD to VLD is the reset delay time tD.
When the voltage on the delay capacitor has reached VUD and reset was set to high, the
watchdog circuit is enabled and discharges CD with the constant current IDWD. If there is
no rising edge observed at the watchdog input, CD will be discharge down to VLDW, then
reset output RO will be set to low and CD will be charged again with the current IDWC until
VD reaches VUD and reset will be set high again.
If the watchdog pulse (rising edge at watchdog input WI) occurs during the discharge
period CD is charged again and the reset output stays high. After VD has reached VUD,
the periodical behavior starts again.
Internal protection circuits protect the IC against:
• Overload
• Overvoltage
• Overtemperature
• Reverse polarity
Data Sheet 4 Rev. 2.7, 2007-06-25
TLE 4271-2
Figure 2 Block Diagram
Temperature
Sensor
Saturation
Control and
Protection
Circuit
+
-
Reference
Bandgap
Adjustment
Reset
Generator
Watchdog
42
17
3
5
6
INH GND AEB01940
Control
Amplifier Buffer
Ι
Q
D
RO
WI
TLE 4271-2
Data Sheet 5 Rev. 2.7, 2007-06-25
Table 2 Absolute Maximum Ratings
Tj = -40 to 150 °C
Parameter Symbol Limit Values Unit Notes
Min. Max.
Input
Voltage
Voltage
Current
VI
VI
II
-42
–
–
42
65
–
V
V
mA
–
t ≤ 400 ms
internally limited
Inhibit
Voltage
Voltage
Current
VINH
VINH
IINH
-42
–
–
42
65
–
V
V
mA
–
t ≤ 400 ms
internally limited
Reset Output
Voltage
Current
VRO
IRO
-0.3
–
42
–
V
mA
–
internally limited
Reset Delay
Voltage
Current
VD
ID
-0.3
-5
7
5
V
mA
–
–
Watchdog
Voltage
Current
VW
IW
-0.3
-5
7
5
V
mA
–
–
Output
Voltage
Current
VQ
IQ
-1.0
-5
16
–
V
mA
–
internally limited
Ground
Current IGND -0.5 – A –
Temperatures
Junction temperature
Storage temperature
Tj
Tstg
–
-50
150
150 °C
°C
–
–
Data Sheet 6 Rev. 2.7, 2007-06-25
TLE 4271-2
Table 3 Operating Range
Parameter Symbol Limit Values Unit Notes
Min. Max.
Input voltage VI640V–
Junction temperature Tj-40 150 °C–
Thermal Resistance
Junction ambient Rthja –
–
65
70
K/W
K/W
–
PG-TO263-7-1
Junction case Rthjc
Zthjc
–
–
3
2
K/W
K/W
–
t < 1 ms
TLE 4271-2
Data Sheet 7 Rev. 2.7, 2007-06-25
Table 4 Characteristics
VI = 13.5 V; -40 °C ≤ Tj ≤ 125 °C; VINH > VU,INH (unless otherwise specified)
Parameter Symbol Limit Values Unit Test Condition
Min. Typ. Max.
Output voltage VQ4.90 5.00 5.10 V 5 mA ≤ IQ ≤ 550 mA;
6 V ≤ VI ≤ 26 V
Output voltage VQ4.90 5.00 5.10 V 26 V ≤ VI ≤ 36 V;
IQ ≤ 300 mA
Output current
limiting
IQmax 650 800 – mA VQ = 0 V
Current
consumption
Iq = II
Iq––6µAVINH = 0 V; IQ = 0 mA
Current
consumption
Iq = II
Iq– 800 – µAVINH = 5 V; IQ = 0 mA
Current
consumption
Iq = II - IQ
Iq–11.5mAIQ = 5 mA
Current
consumption
Iq = II - IQ
Iq– 5575mAIQ = 550 mA
Current
consumption
Iq = II - IQ
Iq– 7090mAIQ = 550 mA; VI = 5 V
Drop voltage Vdr – 350 700 mV IQ = 550 mA1)
Load regulation ∆VQ– 2550mVIQ = 5 to 550 mA;
VI = 6 V
Supply voltage
regulation ∆VQ– 1225mVVI = 6 to 26 V
IQ = 5 mA
Power supply Ripple
rejection
PSRR –54–dBfr = 100 Hz;
Vr = 0.5 Vpp
Data Sheet 8 Rev. 2.7, 2007-06-25
TLE 4271-2
Reset Generator
Switching threshold VRT 4.5 4.65 4.8 V –
Reset high voltage VROH 4.5––V–
Saturation voltage VRO,SAT –60–mVRintern = 30 kΩ;
1.0 V ≤ VQ ≤ 4.5 V
Saturation voltage VRO,SAT – 200 400 mV IR = 3 mA2);
VQ = 4.4 V
Reset pull-up R18 30 46 kΩinternally connected
to Q
Lower reset timing
threshold
VLD 0.2 0.45 0.8 V VQ < VRT
Charge current ID81425µAVD = 1.0 V
Upper timing
threshold
VUD 1.4 1.8 2.3 V –
Delay time tD8 1318msCD = 100 nF
Reset reaction time tRR ––3µsCD = 100 nF
Overvoltage Protection
Turn-off voltage VI, ov 40 44 46 V –
Inhibit
Turn-on voltage VU,INH 1.0 2.0 3.5 V VQ = high (> 4.5 V)
Turn-off voltage VL,INH 0.8 1.3 3.3 V VQ = low (< 0.8 V)
Inhibit current IINH 81225µAVINH = 5 V
Watchdog
Upper watchdog
switching threshold
VUDW 1.4 1.8 2.3 V –
Lower watchdog
switching threshold
VLDW 0.2 0.45 0.8 V –
Discharge current IDWD 1.5 2.7 3.5 µAVD = 1 V
Charge current IDWC 81425µAVD = 1 V
Watchdog period tWD,P 40 55 80 ms CD = 100 nF
Table 4 Characteristics (cont’d)
VI = 13.5 V; -40 °C ≤ Tj ≤ 125 °C; VINH > VU,INH (unless otherwise specified)
Parameter Symbol Limit Values Unit Test Condition
Min. Typ. Max.
TLE 4271-2
Data Sheet 9 Rev. 2.7, 2007-06-25
Watchdog trigger
time
tWI,tr 30 45 66 ms CD = 100 nF
see diagram
Watchdog pulse
slew rate
VWI 5––V/µs from 20% to 80% VQ
1) Drop voltage = VI - VQ (measured when the output voltage has dropped 100 mV from the nominal value
obtained at 13.5 V input)
2) Test condition not applicable during delay time for power-on reset.
Table 4 Characteristics (cont’d)
VI = 13.5 V; -40 °C ≤ Tj ≤ 125 °C; VINH > VU,INH (unless otherwise specified)
Parameter Symbol Limit Values Unit Test Condition
Min. Typ. Max.
Data Sheet 10 Rev. 2.7, 2007-06-25
TLE 4271-2
Figure 3 Test Circuit
Figure 4 Circuit
32
V
V
Ι
V
INH
Ι
C
D
Ι
D
5
D
4
WI
GND
V
6
AES01941
RO
V
V
Q
470 nF
1000 F
Ι
µ
Ι
Ι
TLE 4271-2
17
Q
22 F
RO
µ
Ι
22 F
to MC
Reset 3
4
5
100 nF
AES01942
µ
470 nF
Input
TLE 4271-2
175 V-Output
6
2
e.g. KL 15
Input
Watchdog
Signal
from MC
TLE 4271-2
Data Sheet 11 Rev. 2.7, 2007-06-25
Application Description
The IC regulates an input voltage in the range of 6 V < VI < 40 V to VQnom = 5.0 V. Up to
26 V it produces a regulated output current of more than 550 mA. Above 26 V the save-
operating-area protection allows operation up to 36 V with a regulated output current of
more than 300 mA. Overvoltage protection limits operation at 42 V. The overvoltage
protection hysteresis restores operation if the input voltage has dropped below 36 V. The
IC can be switched off via the inhibit input, which causes the quiescent current to drop
below 10 µA. A reset signal is generated for an output voltage of VQ < 4.5 V. The
watchdog circuit monitors a connected controller. If there is no positive-going edge at the
watchdog input within a fixed time, the reset output is set to low. The delay for power-on
reset and the maximum permitted watchdog-pulse period can be set externally with a
capacitor.
Design Notes for External Components
An input capacitor CI is necessary for compensation of line influences. The resonant
circuit consisting of lead inductance and input capacitance can be damped by a resistor
of approx. 1 Ω in series with CI. An output capacitor CQ is necessary for the stability of
the regulating circuit. Stability is guaranteed at values of CQ ≥ 22 µF and an ESR of
<3Ω.
Reset Circuitry
If the output voltage decreases below 4.5 V, an external capacitor CD on pin D will be
discharged by the reset generator. If the voltage on this capacitor drops below VDRL, a
reset signal is generated on pin RO, i.e. reset output is set low. If the output voltage rises
above the reset threshold, CD will be charged with constant current. After the power-on-
reset time the voltage on the capacitor reaches VDU and the reset output will be set high
again. The value of the power-on-reset time can be set within a wide range depending
of the capacitance of CD.
Reset Timing
The power-on reset delay time is defined by the charging time of an external capacitor
Cd which can be calculated as follows:
tD = CD × ∆V/ID(1)
Definitions:
•CD = delay capacitor
•tD = reset delay time
•ID = charge current, typical 14 µA
•∆V = VUD, typical 1.8 V
•VUD = upper delay timing threshold at CD for reset delay time
Data Sheet 12 Rev. 2.7, 2007-06-25
TLE 4271-2
The reset reaction time trr is the time it takes the voltage regulator to set the reset out
LOW after the output voltage has dropped below the reset threshold. It is typically 1 µs
for delay capacitor of 47 nF. For other values for Cd the reaction time can be estimated
using the following equation:
tRR ≈ 20 s/F × Cd(2)
Figure 5 Time Response
AET01985
t
D
t
RR
RR
t<
Power
Reset Shutdown
Thermal Voltage Drop
at Input Undervoltage
at Output Secondary
Spike Bounce
Load Shutdownon
V
RO, SAT
LD
V
UD
V
V
D, SAT
RT
V
L, INH
V
V
U, INH
INH
V
RO
V
V
D
Q
V
Ι
V
t
t
t
t
t
=
dt
Vd
D
D
C
Ι
TLE 4271-2
Data Sheet 13 Rev. 2.7, 2007-06-25
Watchdog Timing
Figure 6 Time Response, Watchdog Behavior
AES03078
WD, P
t
t
WD, L
D
V
V
Q
V
Ι
V
R
WΙ
V
W
Ι
, tr
t
UDW
V
=-
V
LDW
()
UDW
V
-
V
LDW
()
Ι
DWD
Ι
DWC
t
=
WD, L
C
D
W
Ι
, tr
t
WD, P
t
UDW
V
=-
V
LDW
()( )
Ι
DWC
+
Ι
DWD
Ι
.
DWC
Ι
DWD
C
D
C
;
D
;
UDW
V
V
LDW
Data Sheet 14 Rev. 2.7, 2007-06-25
TLE 4271-2
Typical Performance Characteristics
Output Voltage VQ versus
Temperature Tj
Output Voltage VQ versus
Input Voltage VI (VINH = VI)
AED01928
-40 04080120 ˚C 160
4.6
j
T
Q
V
V
I
= 13.5 V
4.7
4.8
4.9
5.0
5.1
V
5.2
R
6
4
2
04
02
8
12
10
Q
VV
10
V
68
V
Ι
AED01929
= 25
LΩ
Data Sheet 15 Rev. 2.7, 2007-06-25
TLE 4271-2
Output Current Limit IQ versus
Temperature Tj
Current Consumption Iq versus
Output Current IQ
Output Current IQ versus
Input Voltage VI
Current Consumption Iq versus
Output Current IQ
AED01930
-40 04080120 ˚C 160
0
j
T
200
400
600
800
1000
mA
1200
Q max
I
00
AED03076
Ι
q
mA
= 13.5 V
mA
Ι
V
20 40 60 80 120
Q
Ι
1
2
3
4
5
6
AED01931
0 10 20 30 40 V50
0
0.4
0.8
1.2
A
1.0
0.6
0.2
I
V
I
Q
= 125 ˚C
T
j25 ˚C
00
AED03077
Ι
q
mA
= 13.5 V
mA
Ι
V
100 200 300 400 600
Q
Ι
10
20
30
40
50
60
70
80
Data Sheet 16 Rev. 2.7, 2007-06-25
TLE 4271-2
Current Consumption Iq versus
Input Voltage VI
Inhibit Current IINH versus
Inhibit Voltage VINH
Drop Voltage Vdr versus
Output Current IQ
Output Voltage VQ versus
Inhibit Voltage VINH
AED01934
0 10 20 30 40 V50
0
40
80
120
mA
100
60
20
I
V
I
q
20 Ω
L
R
= 10 Ω
50 Ω
R
L
=
0
016
3
2
INH
AED01944
4V
2
4
6
8
10
12
V
Ι
= 13.5 V
= 25 C
j
T
INH, high
Ι
Ι
INH, on
Ι
INH, off
5
INH
V
µA
Ι
400
200
300
100
2000 400
0
800
600
700
500
Dr
V
mV
mA
600 1000
Ι
Q
AED02755
T
= 125 C
j
T
= 25 C
j
3
3
21
0
0
1
2
6
5
4
V
5V
46
V
INH
= 25 C
= 13.5 V
Ι
j
V
T
AED01945
Q
V
Data Sheet 17 Rev. 2.7, 2007-06-25
TLE 4271-2
Inhibit Current Consumptions IINH
versus Temperature Tj
Switching Voltage VUD and VLDW
versus Temperature Tj
Inhibit Voltages VINH versus
Temperature Tj
-40
00 1208040
T
j
A
14
AED01946
160
Ι
INH
µ
2
4
6
8
10
12
Ι
INH
, high
Ι
INH
, on
Ι
INH
, off
UD
40-40 0
0
V
V
V
UDW
,
V
V
Ι
160
C
80 120
T
j
AED01948
= 13.5 V
1.2
0.8
0.4
1.6
2.4
2.0
LDW
V
3
2
1
40-40 0
0
4
V
6
5
INH
160
C
80 120
AED01947
j
T
V
V
INH
, on
INH
, off
V
Data Sheet 18 Rev. 2.7, 2007-06-25
TLE 4271-2
Charge Current ID, IDWC and Discharge
Current IDWD versus Temperature Tj
Watchdog Pulse Time Tw versus
Temperature Tj
AED01949
-40
0
I
V
= 13.5 V
2
4
6
8
10
12
14
16
µA
04080
120 160˚C
I
T
j
= 1 V
D
V
D
I
,
I
DWC
I
DWD
80
40
-40
0
10
30
20
400
50
60
70
80
160120 C
T
j
= 13.5 V
AED01950
Ι
C
D
V
= 100 nF
ms
W
T
TLE 4271-2
Data Sheet 19 Rev. 2.7, 2007-06-25
Package Outlines
Figure 7 PG-TO220-7-11 (Plastic Transistor Single Outline)
Green Product (RoHS compliant)
To meet the world-wide customer requirements for environmentally friendly products
and to be compliant with government regulations the device is available as a green
product. Green products are RoHS-Compliant (i.e Pb-free finish on leads and suitable
for Pb-free soldering according to IPC/JEDEC J-STD-020).
Typical
±0.11.27
4.4
9.25±0.2
0.05
1)
All metal surfaces tin plated, except area of cut.
2.4
0.5±0.1
±0.38.6
10.2 ±0.3
±0.43.9
±0.48.4
3.7±0.3
A
A0.25 M
9.8±0.15
2.8
1)
15.65±0.3
13.4
0...0.15
1.27
0.6 ±0.1
C
±0.2
17 ±0.3
8.51)
9.9±0.2
7x
-0.15
3.7
10±0.2
6x
C
1.6±0.3
GPT09083
You can find all of our packages, sorts of packing and others in our
Infineon Internet Page “Products”: http://www.infineon.com/products.
Dimensions in mm
SMD = Surface Mounted Device
Data Sheet 20 Rev. 2.7, 2007-06-25
TLE 4271-2
Figure 8 PG-TO220-7-12 (Plastic Transistor Single Outline)
Green Product (RoHS compliant)
To meet the world-wide customer requirements for environmentally friendly products
and to be compliant with government regulations the device is available as a green
product. Green products are RoHS-Compliant (i.e Pb-free finish on leads and suitable
for Pb-free soldering according to IPC/JEDEC J-STD-020).
GPT09084
A
BA0.25 M
Typical
9.8±0.15
2.8
1)
15.65
±0.3
13.4
0...0.15
1.27
0.6 ±0.1
±0.11.27
4.4
B
9.25
±0.2
0.05
1)
All metal surfaces tin plated, except area of cut.
C
±0.2
17
±0.3
8.51)
10±0.2
3.7-0.15
C
2.4
0.5±0.1
13
±0.5
±0.5
11
7x
You can find all of our packages, sorts of packing and others in our
Infineon Internet Page “Products”: http://www.infineon.com/products.
Dimensions in mm
SMD = Surface Mounted Device
TLE 4271-2
Data Sheet 21 Rev. 2.7, 2007-06-25
Figure 9 PG-TO263-7-1 (Plastic Transistor Single Outline)
Green Product (RoHS compliant)
To meet the world-wide customer requirements for environmentally friendly products
and to be compliant with government regulations the device is available as a green
product. Green products are RoHS-Compliant (i.e Pb-free finish on leads and suitable
for Pb-free soldering according to IPC/JEDEC J-STD-020).
A
BA0.25 M
0.1
Typical
±0.2
10
8.5 1)
7.55
1)
(15)
±0.2
9.25
±0.3
1
0...0.15
7 x 0.6 ±0.1
±0.1
GPT09114
1.27
4.4
B
0.5
±0.1
±0.3
2.7
4.7
±0.5
0.05
1)
0.1
Metal surface min. X = 7.25, Y = 6.9
2.4
1.27
All metal surfaces tin plated, except area of cut.
0...0.3
B
6 x
8˚ MAX.
You can find all of our packages, sorts of packing and others in our
Infineon Internet Page “Products”: http://www.infineon.com/products.
Dimensions in mm
SMD = Surface Mounted Device
Data Sheet 22 Rev. 2.7, 2007-06-25
TLE 4271-2
Revision History
Version Date Changes
Rev. 2.7 2007-03-20 Initial version of RoHS-compliant derivate of TLE 4271-2
Page 1: AEC certified statement added
Page 1 and Page 19 RoHS compliance statement and
Green product feature added
Page 1 and Page 19 Package changed to RoHS
compliant version
Legal Disclaimer updated
Edition 2007-06-25
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2007 Infineon Technologies AG
All Rights Reserved.
Legal Disclaimer
The information given in this document shall in no event be regarded as a guarantee of conditions or
characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any
information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties
and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual property rights
of any third party.
Information
For further information on technology, delivery terms and conditions and prices, please contact the nearest
Infineon Technologies Office (www.infineon.com).
Warnings
Due to technical requirements, components may contain dangerous substances. For information on the types in
question, please contact the nearest Infineon Technologies Office.
Infineon Technologies components may be used in life-support devices or systems only with the express written
approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure
of that life-support device or system or to affect the safety or effectiveness of that device or system. Life support
devices or systems are intended to be implanted in the human body or to support and/or maintain and sustain
and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may
be endangered.
