Type Package
TLE 4251 D PG-TO252-5-11
TLE 4251 G PG-TO263-5-1
Low Drop Voltage Tracker
TLE 4251
P-TO252-5-11
P-TO263-5-1
Data Sheet 1 Rev. 2.9, 2007-03-20
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
• Green Product (RoHS compliant)
• AEC Qualified
Functional Description
The TLE 4251 is a monolithic integrated low drop voltage
tracker in the very small SMD package PG-TO252-5-1. 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 TLE 4251 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.
Data Sheet 2 Rev. 2.9, 2007-03-20
TLE 4251
Figure 1 Pin Configuration (top view)
Table 1 Pin Definitions and Functions
Pin No. Symbol Function
1IInput voltage
2ENEnable; high-active input
3GNDGround
4ADJAdjust; connect directly to the reference or with a voltage
divider to the reference (for reference-proportional output
voltages, VQ<Vref)…..
5QOutput voltage; must be blocked by a capacitor
CQ ≥ 22 μF, ESR ≤ 3 Ω to GND
AEP02810
IEN
1
GND
QADJ
5
AEP03119
I
1
GND
EN QADJ
5
PG-TO252-5-11
PG-TO263-5-1
TLE 4251
Data Sheet 3 Rev. 2.9, 2007-03-20
Figure 2 Block Diagram
AES02807
TLE 4251
ADJ
EN
I
GND
Saturation
Control and
Protection
Circuit
Temperature
Control
Data Sheet 4 Rev. 2.9, 2007-03-20
TLE 4251
Note: Maximum ratings are absolute ratings; exceeding any one of these values may
cause irreversible damage to the integrated circuit.
Table 2 Absolute Maximum Ratings
-40 °C < Tj < 150 °C
Parameter Symbol Limit Values Unit Remarks
Min. Max.
Input
Voltage VI-42 45 V –
Current II– – mA internally limited
Output
Voltage VQ-2 45 V –
Current IQ– – mA internally limited
Adjust
Voltage VADJ -42 45 V –
Current IADJ ––μA internally limited
Enable
Voltage VEN -42 45 V –
Current IEN ––μA internally limited
Temperatures
Junction temperature Tj-40 150 °C–
Storage temperature Tstg -50 150 °C–
Thermal Resistances
Junction case Rthjc – 4 K/W TLE 4251 D
Junction ambient Rthja – 78 K/W TLE 4251 D1)
Junction case Rthjc – 3 K/W TLE 4251 G
Junction ambient Rthja – 52 K/W TLE 4251 G1)
1) Worst case, regarding peak temperature; zero airflow; mounted an a PCB 80 × 80 × 1.5 mm3, heat sink area
300 mm2.
TLE 4251
Data Sheet 5 Rev. 2.9, 2007-03-20
Table 3 Operating Range
Parameter Symbol Limit Values Unit Remarks
Min. Max.
Input voltage VI41) 40 V –
Adjust input voltage VADJ 2.5 40 V –
Adjust input voltage VADJ 02.5VVQ ≤ VADJ + ΔVQ
Enable input voltage VEN 040V–
Junction temperature Tj-40 150 °C–
1) VI > VADJ + VDR
Data Sheet 6 Rev. 2.9, 2007-03-20
TLE 4251
Table 4 Electrical Characteristics
VI = 13.5 V; 2.5 V ≤ VADJ ≤ VI - 0.5 V; -40 °C < Tj < 150 °C; unless otherwise specified
Parameter Symbol Limit Values Unit Test Condition
Min. Typ. Max.
Output
Output voltage tracking
accuracy
ΔVQ = VADJ - VQ
ΔVQ-10 – 10 mV VI < 13.5 V;
-40 °C < Tj < 125 °C;
1 mA < IQ < 300 mA
Output voltage tracking
accuracy
ΔVQ-10 – 10 mV 6 V < VI < 40 V;
5 mA < IQ < 200 mA
Output voltage tracking
accuracy
ΔVQ-25 – 25 mV 6 V < VI < 28 V;
1 mA < IQ < 300 mA
Drop voltage Vdr – 280 520 mV IQ = 300 mA;
VADJ > 4 V;
Enable ON1)
Output current IQ400 450 800 mA Tj ≤ 125 °C1)
Output capacitor CQ22 – – μFESR ≤ 3 Ω at 10 kHz
Current consumption
Iq = II - IQ
Iq–1020mAIQ = 300 mA
Current consumption
Iq = II - IQ
Iq– 230 300 μAIQ < 1 mA; Tj < 85 °C;
VEN in ON state
Quiescent current
(stand-by)
Iq = II - IQ
Iq–02μAVEN = 0 V; Tj < 85 °C
Regulator Performance
Load regulation ΔVQ-35 ±535mV5 mA < IQ < 300 mA;
VI = 6 V; VADJ = 5 V
Line regulation ΔVQ-25 ±10 25 mV 12 V < VI < 32 V;
IQ = 5 mA
Power Supply Ripple
Rejection
PSRR 60 – – dB fr = 100 Hz;
Vr = 0.5 Vpp;
VADJ = 5 V;
CQ = 22 μF Tantalum
Adjust Input
Input biasing current IADJ –0.10.5μAVADJ = 5 V
TLE 4251
Data Sheet 7 Rev. 2.9, 2007-03-20
Application Information
Figure 3 Application Circuit
Enable
Enable on voltage range VEN ON 2––VVQ ON
Enable off voltage range VEN OFF ––0.5VVQ ≤ 0.1 V
Input current IEN 54070μAVEN = 5 V
1) Measured when the output voltage VQ has dropped 100 mV from the nominal value.
Table 4 Electrical Characteristics (cont’d)
VI = 13.5 V; 2.5 V ≤ VADJ ≤ VI - 0.5 V; -40 °C < Tj < 150 °C; unless otherwise specified
Parameter Symbol Limit Values Unit Test Condition
Min. Typ. Max.
e.g. TLE 4470
TLE 4269
TLE 4278
AES02808
TLE 4251
GND
I
ADJ
Q
EN
µC
LOAD
to
sensor
GND
Q
IV
CC
I/O
100 nF
6...40 V
22 µF
22 µF 100 nF
C
100 nF
Saturation
Control and
Protection
Circuit
Temperature
Control
Data Sheet 8 Rev. 2.9, 2007-03-20
TLE 4251
Quiescent Current Iq versus
Output Current IQ
Tracking Accuracy ΔVQ versus
Temperature Tj, VADJ = 5 V
Enable Current IEN versus
Enable Voltage VEN
Current Consumption Iq versus
Input Voltage VI, VADJ = 5 V
AED02900
00
q
I
Q
I
100 200 300 mA 450
5
10
15
20
25
30
mA
AED02902
-6
-40
Q
V
j
T
-4
-2
0
2
4
6
mV
040 80 120 160
I
V
= 40 V
I
Q
= 200 mA
V
Q
I
= 6 V
= 300 mA
I
˚C
AED02901
00
ENABLE
I
ENABLE
V
5
10
15
20
25
30
0.5 1 1.5 2 2.5 3 3.5 4V
µA
AED02904
150 0
q
I
Ι
V
5 10 15 20 25 30 35 V 45
µA
200
250
300
350
400
I
Q= 10 mA
= 1 mA
I
Q
Data Sheet 9 Rev. 2.9, 2007-03-20
TLE 4251
Tracking Accuracy ΔVQ versus
Output Current IQ
AED02903
00
Q
V
Q
I
0.5
1
1.5
2
2.5
3
mV
100 200 300 400 500
ADJ
V
= 5 V
mA
= 3 V
V
ADJ
Data Sheet 10 Rev. 2.9, 2007-03-20
TLE 4251
Package Outlines
Figure 4 PG-TO252-5-11 (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).
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
1) Includes mold flashes on each side.
4.56 0.25
M
A
6.5
5.7 MAX.
±0.1
per side
0.15 MAX.
-0.2
6.22
±0.5
9.98
(4.24) 1
A
1.14
5 x 0.6
±0.15
0.8
±0.1
+0.15
-0.05
0.1
B
-0.04
+0.08
0...0.15
0.51 MIN.
0.5
B
2.3
-0.10
0.5
+0.05
-0.04
+0.08
(5)
-0.01
0.9
+0.20
B
1)
All metal surfaces tin plated, except area of cut.
GPT09527
TLE 4251
Data Sheet 11 Rev. 2.9, 2007-03-20
Figure 5 PG-TO263-5-1 (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).
BA0.25
M
±0.2
GPT09113
10
8.5
1)
(15)
±0.2
9.25 ±0.3
1
0...0.15
5 x 0.8
±0.1
±0.1
1.27
4.4
B
0.5
±0.1
±0.3
2.7
4.7±0.5
2.4
1.7
0...0.3 A
1)
7.55
4 x
All metal surfaces tin plated, except area of cut.
Metal surface min. X = 7.25, Y = 6.9
Typical
1)
0.1 B
0.1
0.05
8˚ MAX.
GPT09113
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 4251
Revision History
Data Sheet 12 Rev. 2.9, 2007-03-20
Revision History
Version Date Changes
Rev. 2.9 2007-03-20 Initial version of RoHS-compliant derivate of TLE 4251
Page 1: AEC certified statement added
Page 1 and Page 10: RoHS compliance statement and
Green product feature added
Page 1 and Page 10: Package changed to RoHS compliant
version
Legal Disclaimer updated
Edition 2007-03-20
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.
