TLE4251
Low drop voltage tracker
Features
•
Output tracking tolerance ≤ ±0.2%
•
400 mA output current capability
•
Enable Function
•
Very low current consumption in OFF mode
•
Wide operation range: up to 40 V
•
Wide temperature range: -40 °C ≤ Tj ≤ 150 °C
•
Output protected against short circuit
•
Overtemperature protection
•
Reverse polarity proof
•
Available in standard PG-TO252-5 and PG-TO263-5 packages
•
Green Product (RoHS compliant)
Potential applications
•
General automotive applications
Product validation
Qualified for automotive applications. Product validation according to AEC-Q100.
Description
The TLE4251 is a monolithic integrated low drop voltage tracker. It is designed to supply e.g. sensors under
the severe conditions of automotive applications. Therefore the device is equipped with additional protection
functions against overload, short circuit and reverse polarity.
Supply voltages up to 40 V are tracked to a reference voltage given to the adjust input via an external resistor.
The output is able to drive loads up to 400 mA while it follows e.g. the 5 V output of a main voltage regulator
within an accuracy of 0.5%. For loads up to 300 mA the tracking accuracy is 0.2%.
The TLE4251 can be switched in stand-by mode via the enable EN input which causes the current consumption
to drop to very low values. This feature makes the IC suitable for low power battery applications.
Type
Package
Marking
TLE4251D
PG-TO252-5
4251D
TLE4251G
PG-TO263-5
4251G
Datasheet
www.infineon.com/OPTIREG-Linear
1
Rev. 3.0
2022-05-31
TLE4251
Low drop voltage tracker
Table of Contents
1
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
2.1
2.2
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin definitions and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
3.1
3.2
3.3
General product characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
4.1
4.1.1
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typical performance graphs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5
5.1
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Further application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Datasheet
2
5
5
6
6
Rev. 3.0
2022-05-31
TLE4251
Low drop voltage tracker
Block diagram
1
Block diagram
TLE 4251
Saturation
Control and
Protection
Circuit
Temperature
Control
I
ADJ
EN
GND
Figure 1
Datasheet
AES02807
Block diagram
3
Rev. 3.0
2022-05-31
TLE4251
Low drop voltage tracker
Pin configuration
2
Pin configuration
2.1
Pin assignment
GND
1
5
1
I
EN
ADJ
5
Q
AEP02810
I
EN GND ADJ
Q
AEP03119
Figure 2
Pin configuration
2.2
Pin definitions and functions
Pin
Symbol Function
1
I
Input voltage
2
EN
Enable; high-active input
3
GND
Ground
4
ADJ
Adjust; connect directly to the reference or with a voltage divider to the reference (for
reference-proportional output voltages, VQ VADJ + VDR
Note:
Within the functional or operating range, the IC operates as described in the circuit description. The
electrical characteristics are specified within the conditions given in the electrical characteristics
table.
3.3
Thermal resistance
Note:
This thermal data was generated in accordance with JEDEC JESD51 standards. For further
information visit https://www.jedec.org.
Table 3
Thermal resistance
Parameter
Symbol
Values
Min.
Typ.
Max.
Unit
Note or
Test Condition
Number
Junction to case
RthJC
–
4
–
K/W
TLE4251D
P_3.3.1
Junction to ambient
RthJA
–
78
–
K/W
TLE4251D1)
P_3.3.2
Junction to case
RthJC
–
3
–
K/W
TLE4251G
P_3.3.3
1)
Junction to ambient
RthJA
–
52
–
K/W TLE4251G
P_3.3.4
1)Worst case, regarding peak temperature; zero airflow; mounted an a PCB 80 × 80 × 1.5 mm3, heat sink area
300 mm2.
Datasheet
6
Rev. 3.0
2022-05-31
TLE4251
Low drop voltage tracker
Electrical characteristics
4
Electrical characteristics
4.1
Electrical characteristics
Table 4
Electrical characteristics
VI = 13.5 V; 2.5 V ≤ VADJ ≤ VI - 0.5 V; Tj = -40°C to 150°C; unless otherwise specified
Parameter
Symbol
Values
Min.
Typ.
Max.
Unit
Note or
Test Condition
Number
Output
Output voltage tracking
accuracy
∆VQ = VADJ - VQ
∆VQ
-10
–
10
mV
VI < 13.5 V;
-40 °C < Tj < 125 °C;
1 mA < IQ < 300 mA
P_4.1.1
Output voltage tracking
accuracy
∆VQ
-10
–
10
mV
6 V < VI < 40 V;
5 mA < IQ < 200 mA
P_4.1.2
Output voltage tracking
accuracy
∆VQ
-25
–
25
mV
6 V < VI < 28 V;
1 mA < IQ < 300 mA
P_4.1.3
Drop voltage
Vdr
–
280
520
mV
IQ = 300 mA;
VADJ > 4 V;
Enable ON1)
P_4.1.4
Output current
IQ
400
450
800
mA
Tj ≤ 125 °C1)
P_4.1.5
Output capacitor
CQ
22
–
–
µF
ESR ≤ 3 Ω at 10 kHz
P_4.1.6
Current consumption
Iq = II - IQ
Iq
–
10
20
mA
IQ = 300 mA
P_4.1.7
Current consumption
Iq = II - IQ
Iq
–
230
300
µA
IQ < 1 mA; Tj < 85 °C;
VEN in ON state
P_4.1.8
Quiescent current
(stand-by)
Iq = II - IQ
Iq
–
0
2
µA
VEN = 0 V; Tj < 85 °C
P_4.1.9
Load regulation
∆VQ
-35
±5
35
mV
5 mA < IQ < 300 mA;
VI = 6 V; VADJ = 5 V
P_4.1.10
Line regulation
∆VQ
-25
±10
25
mV
12 V < VI < 32 V;
IQ = 5 mA
P_4.1.11
Power Supply Ripple
Rejection
PSRR
60
–
–
dB
fr = 100 Hz;
Vr = 0.5 Vpp;
VADJ = 5 V;
CQ = 22 µF Tantalum
P_4.1.12
IADJ
–
0.1
0.5
µA
VADJ = 5 V
P_4.1.13
VEN ON
2
–
–
V
VQ ON
P_4.1.14
Regulator Performance
Adjust Input
Input biasing current
Enable
Enable on voltage range
Datasheet
7
Rev. 3.0
2022-05-31
TLE4251
Low drop voltage tracker
Electrical characteristics
Table 4
Electrical characteristics (cont’d)
VI = 13.5 V; 2.5 V ≤ VADJ ≤ VI - 0.5 V; Tj = -40°C to 150°C; unless otherwise specified
Parameter
Symbol
Values
Min.
Typ.
Max.
Unit
Note or
Test Condition
Number
Enable off voltage range
VEN OFF
–
–
0.5
V
VQ ≤ 0.1 V
P_4.1.15
Input current
IEN
5
40
70
µA
VEN = 5 V
P_4.1.16
1) Measured when the output voltage VQ has dropped 100 mV from the nominal value.
4.1.1
Typical performance graphs
Typical performance characteristics
Enable current IEN versus
enable voltage VEN
Quiescent current Iq versus
output current IQ
AED02900
30
Iq mA
IENABLE
25
25
20
20
15
15
10
10
5
5
0
0
100
200
300
0
mA 450
IQ
Datasheet
AED02901
30
µA
0
0.5
1
1.5
2
2.5
3
3.5 V 4
VENABLE
8
Rev. 3.0
2022-05-31
TLE4251
Low drop voltage tracker
Electrical characteristics
Tracking accuracy ∆VQ versus
junction temperature TJ , VADJ = 5V
VQ
Current consumption Iq versus
input voltage VI , VADJ = 5V
AED02902
6
mV
AED02904
400
Iq µA
4
350
VI = 6 V
IQ = 300 mA
2
300
0
IQ = 10 mA
250
-2
VI = 40 V
IQ = 200 mA
-4
-6
-40
0
40
80
IQ = 1 mA
200
150
120 ˚C 160
0
5 10 15 20 25 30 35
V 45
VΙ
Tj
Tracking accuracy ∆VQ versus
output current IQ
VQ
AED02903
3
mV
2.5
VADJ = 5 V
2
VADJ = 3 V
1.5
1
0.5
0
0
100
200
300
400 mA 500
IQ
Datasheet
9
Rev. 3.0
2022-05-31
TLE4251
Low drop voltage tracker
Application information
5
Application information
Note:
The following information is given as a hint for the implementation of the device only and shall not
be regarded as a description or warranty of a certain functionality, condition or quality of the device.
6...40 V
µC
e.g. TLE 4470
TLE 4269
TLE 4278
I
Q
VCC
GND
100 nF
22 µF
I/O
TLE 4251
Saturation
Control and
Protection
Circuit
Temperature
Control
I
LOAD
to
sensor
Q
22 µF
100 nF
ADJ
C
100 nF
EN
GND
AES02808
Figure 3
Application diagram
Note:
This is a very simplified example of an application circuit. The function must be verified in the real
application.
5.1
Further application information
•
Please contact us for information regarding the FMEA pin
•
Existing Application Note (Title)
•
For further information you may contact https://www.infineon.com
Datasheet
10
Rev. 3.0
2022-05-31
TLE4251
Low drop voltage tracker
Package information
6
Package information
6.5 +0.15
-0.05
A
1)
2.3 +0.05
-0.10
0.9 +0.20
-0.01
0...0.15
0.51 MIN.
0.15 MAX.
per side
0.5 +0.08
-0.04
B
(5)
0.8 ±0.15
(4.24) 1 ±0.1
9.98 ±0.5
6.22 -0.2
5.7 MAX.
0.5 +0.08
-0.04
5 x 0.6 ±0.1
1.14
4.56
0.1 B
0.25 M A B
1) Includes mold flashes on each side.
All metal surfaces tin plated, except area of cut.
Figure 4
PG-TO252-5 1)(Plastic transistor single outline)
4.4
10 ±0.2
1.27 ±0.1
A
8.5 1)
B
0.05
2.4
0.1
2.7 ±0.3
4.7 ±0.5
7.55 1)
9.25 ±0.2
(15)
1±0.3
0...0.3
0...0.15
5 x 0.8 ±0.1
0.5 ±0.1
4 x 1.7
0.25
M
A B
8˚ MAX.
1) Typical
Metal surface min. X = 7.25, Y = 6.9
All metal surfaces tin plated, except area of cut.
Figure 5
0.1 B
GPT09113
1)
PG-TO263-5 (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).
Further information on packages
https://www.infineon.com/packages
1) Dimensions in mm
Datasheet
11
Rev. 3.0
2022-05-31
TLE4251
Low drop voltage tracker
Revision history
7
Revision history
Revision Date
Changes
Rev. 3.0
2022-05-31 Updated layout and template
Editorial changes
Rev. 2.9
2007-03-20 Initial version of RoHS-compliant derivate of TLE4251
Page 1: AEC certified statement added
Page 1 and page 11: RoHS compliance statement and Green product feature added
Page 1 and page 11: Package changed to RoHS compliant version
Legal Disclaimer updated
Datasheet
12
Rev. 3.0
2022-05-31
Trademarks
All referenced product or service names and trademarks are the property of their respective owners.
Edition 2022-05-31
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2022 Infineon Technologies AG.
All Rights Reserved.
Do you have a question about any
aspect of this document?
Email: erratum@infineon.com
Document reference
Z8F55248406
IMPORTANT NOTICE
The information given in this document shall in no
event be regarded as a guarantee of conditions or
characteristics ("Beschaffenheitsgarantie").
With respect to any examples, hints or any typical
values stated herein and/or any information regarding
the application of the product, 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.
In addition, any information given in this document is
subject to customer's compliance with its obligations
stated in this document and any applicable legal
requirements, norms and standards concerning
customer's products and any use of the product of
Infineon Technologies in customer's applications.
The data contained in this document is exclusively
intended for technically trained staff. It is the
responsibility of customer's technical departments to
evaluate the suitability of the product for the intended
application and the completeness of the product
information given in this document with respect to
such application.
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 products may contain
dangerous substances. For information on the types
in question please contact your nearest Infineon
Technologies office.
Except as otherwise explicitly approved by Infineon
Technologies in a written document signed by
authorized representatives of Infineon Technologies,
Infineon Technologies’ products may not be used in
any applications where a failure of the product or any
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