SCT 595
Low-Drop Voltage Tracker TLE 4250 G
Data Sheet Rev. 2.2 1 2000-10-04
Features
• Output tracking tolerance ≤ ± 0.5%
• 50 mA output current
• Combined Tracking/Enable input
• Very low current consumption in off mode
• Low drop voltage
• Suitable for use in automotive electronics
• 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
• Very small SMD-Package SCT 595
Functional Description
The TLE 4250 G is a monolithic integrated low-drop voltage tracker in the very small
SMD package SCT 595. It is designed to supply e.g. sensors under the severe
conditions of automotiv e application s. Therefore t he device is eq uipped with additional
protection functions against overload, short circuit and reverse polarity.
Supply voltages up to 40 V are tracked to a reference voltage at the adjust input.
Therefore the Adjust pin has to be connected to a reference voltage, e.g. to a 5 V supply
on a micro-controller port.
The output is able to drive a load up to 50 mA while it follows the output of a main voltage
regulator within an accuracy of 0.5%.
The TLE 4250 G can be switched in stand-by mode via the adjust input which causes
the current c onsumption to drop to very low va lues. This feature make s the IC suita ble
for low power battery applications.
Type Ordering Code Package
TLE 4250 G Q67006-A9351 SCT-595 (SMD)
TLE 4250 G
Data Sheet Rev. 2.2 2 2000-10-04
Figure 1 Pin Configuration (top view)
Pin Definitions and Functions
Pin No. Symbol Function
1ADJAdjust/Enable input; connect to the reference voltage via
ext. resistor or micro-controller port; high active input
2GNDGround; internally connected to pin 5
3IInput voltage
4QOutput voltage; must be blocked by a capacitor
CQ ≥ 1 µF, 2 Ω ≤ ESR ≤ 7 Ω
5GNDGround
AEP02581
2
3
1
4
5
ADJ
GND
Ι
GND
Q
TLE 4250 G
Data Sheet Rev. 2.2 3 2000-10-04
Figure 2 Block Diagram
AEB02582
-
+
TLE 4250G
3
Ι
2, 5
4Q
1ADJ
TLE 4250 G
Data Sheet Rev. 2.2 4 2000-10-04
1) Worst case, regarding peak temperature; zero airflow; mounted an a PCB 80 ×80 ×1.5 mm3, heat sink area
300 mm2.
Note: Maximum ratings are absolute ratings; exceeding any one of these values may
cause irreversible damage to the integrated circuit.
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 internal ly lim ited
Output
Voltage VQ– 140 V –
Current IQ––mA internal ly lim ited
Adjust
Voltage VADJ – 0.3 40 V –
Current IADJ ––µA internally limited
Temperatures
Junction temperature Tj– 40 150 °C–
Storage temperature Tstg – 50 150 °C–
Thermal Resistances
Ju nction pin Rthj-pin –30 K/W measured to pin 5
Junction ambient Rthja –99 K/W 1)
TLE 4250 G
Data Sheet Rev. 2.2 5 2000-10-04
Operating Range
Parameter Symbol Limit Values Unit Remarks
min. max.
Input voltage VI440V–
Adjust input voltage VADJ 2.5 36 V –
Junction temperature Tj– 40 150 °C–
TLE 4250 G
Data Sheet Rev. 2.2 6 2000-10-04
Electrical Characteristics
VI= 13.5 V; VADJ >2.5V; –40 °C<Tj<150°C; unless otherwise specified
Parameter Symbol Limit Values Unit Test Condition
min. typ. max.
Output
Output volt age trackin g
accuracy
∆VQ = VADJ – VQ
∆VQ–25 –25 mV 6 V < VI < 28 V
1 mA < IQ < 50 mA
Output volt age trackin g
accuracy ∆VQ–25 –25 mV 6 V < VI < 40 V
1 mA < IQ < 10 mA
Output volt age trackin g
accuracy ∆VQ–5–5mV6 V < VI < 16 V
1 mA < IQ < 10 mA
Drop voltage Vdr –100 300 mV IQ = 10 mA;
VADJ >4V
1)
Output current IQ50 70 –mA 1)
Tj<125°C
Output capa ci tor CQ1––µF at 10 kHz;
2 Ω ≤ ESR ≤ 7 Ω
Current consumption
Iq = II – IQ
Iq–1.5 3.0 mA IQ < 30 mA
Current consumption
Iq = II – IQ
Iq–80 150 µAIQ < 1 mA
Quiescent current
(stand-by)
Iq = II – IQ
Iq–10 20 µAVADJ = 0 V
Tj < 85 °C
Current consumption
(drop area) Iq––3mAVADJ = VI=5V
IQ = 0 mA
Load regulation ∆VQ–15 – 15 mV 1 mA < IQ < 30 mA
Line regulation ∆VQ–10 – 10 mV 6 V < VI < 40 V
IQ = 10 mA
1) Me as ured when the ou tp ut voltage VQ has dropped 100 mV from the nominal value.
TLE 4250 G
Data Sheet Rev. 2.2 7 2000-10-04
Figure 3 Application Circuit
Power-Supply-Ripple-
Rejection PSRR –60 –dB fr = 100 Hz
Vr = 0.5 VPP
Adjust/Enable Input
Input biasing current IADJ –0.1 0.5 µµAVADJ = 5 V
Adjust low voltage to
disable VADJ ––0.8 V Tj< 125 °C
VQoff
Adjust range VADJ 2.0 –36 V VQ–VADJ <25mV
Tj< 125 °C
Electrical Characteristics (cont’d)
VI= 13.5 V; VADJ >2.5V; –40 °C<Tj<150°C; unless otherwise specified
Parameter Symbol Limit Values Unit Test Condition
min. typ. max.
AES02583
-
+
TLE 4250G
3Ι
2, 5
4Q
1 ADJ
C
1µ
QF
100 nF
CΙ
TLE 4470
TLE 4270
TLE 4478
100 nF
Ι
V VQVCC
e.g. to sensor
6 ... 40 V
I/O
ADJ
V
5 V
C
µ
5 V
GND
e.g.
R
2.2
QΩ
TLE 4250 G
Data Sheet Rev. 2.2 8 2000-10-04
Region of Stability for
CQ = 1 µF Region of Stability for
CQ = 2.2 µF
8
00
2
10 20
4
6
Ω
ESR
10
12
16
14
20
5030 mA
I
40
Q
AED02917
8
00
2
10 20
4
6
Ω
ESR
10
12
16
14
20
5030
I
40
Q
mA
AED02918
TLE 4250 G
Data Sheet Rev. 2.2 9 2000-10-04
Typical Performance Characteristics
Tracking Accuracy ∆VQ versus
Temperature Tj
Output Voltage VQ versus
Adjust Voltage VADJ, VI>VADJ
Tracking Accuracy ∆VQ versus
Output Current IQ
Output Voltage VQ versus
Input Voltage VI, VADJ =5V
-6
-40
AED02740
V
Q
-2
2
mV
6
-4
0
4
j
T˚C
0 40 80 120 160
00
AED02742
VQ
2
4
V
6
1
3
5
ADJ
V
1 2 345
V
-150
AED02741
V
Q
-5
5
mV
15
-10
0
10
Q
Ι
mA
10 20 30 40 50
125 ˚C
25 ˚C
00
AED02743
V
Q
2
4
V
6
1
3
5
I
V
V
12 3456
TLE 4250 G
Data Sheet Rev. 2.2 10 2000-10-04
Drop Voltage VDR versus
Output Current IQ, VADJ =5V
Output Current IQ versus
Input Voltage VI
Current Consumption Iq versus
Output Current IQ
Current Consumption Iq versus
Input Voltage VI, VADJ =5V
00
AED02744
VQ
200
400
mV
600
100
300
500
Q
Ι
mA
10 20 30 40 50
00
AED03012
Ι
Q
40
80
mA
120
20
60
100
I
V
10 20 30 40 50
= 25 ˚C
= 125 ˚C
V
j
T
j
T
00
AED02746
Ι
q
2
4
mA
6
1
3
5
10 20 30 40 50
Q
Ι
mA
00
AED02747
Ι
q
2
4
mA
6
1
3
5
40
I
V
V
= 20 mA
= 1 mA
q
Ι
q
Ι
10 20 30
TLE 4250 G
Data Sheet Rev. 2.2 11 2000-10-04
Package Outlines
acc. to
+0.2
1.9
0.6
-0.05
+0.1
+0.1
-0.05
0.3
B
A
0.25
M
B
1.1 max
2.6 max
10˚max
0.1 max
A
M
0.20
2.9
±0.2
1.6
±0.1
DIN 6784
(2.2)
(0.3)
1.2
-0.05
+0.1
0.95
-0.06
+0.1
0.15
10˚max
0.25 min
(0.4)
1)
(0.23)
1)
(0.13)
1)
Contour of slot depends on profile
of gull-wing lead form
SCT-595
(Special Package)
Sorts of Packing
Package outlines for tubes, trays etc. are contained in our
Data Book “Package Information”.Dimensions in mm
SMD = Surface Mounted Device
TLE 4250 G
Data Sheet Rev. 2.2 12 2000-10-04
Edition 2000-10-04
Published by Infineon Technologies AG,
St.-Martin-Strasse 53,
D-81541 München
© Infineon Technologies AG 2000.
All Rights Reserved.
Attention please!
The information herein is given to describe
certain components and shall not be consid-
ered as warranted characteristics.
Terms of delivery and rights to technical
change reserved.
We hereby disclaim any and all warranties,
including but not limited to warranties of non-
infringement, regarding circuits, descriptions
and charts stated herein.
Infineon Technologies is an approved CECC
manufacturer.
Information
For further information on technology, deliv-
ery terms and con ditions and prices please
contact your neares t Infineo n Technologies
Office in Germany or our Infineon Technolo-
gies Representatives worldwide (see ad-
dress list).
Warnings
Due to technical require men ts com ponents
may contain dangerous substanc es. For in-
format ion on the types in quest ion ple ase
contact your nearest Infineon Tec hnologies
Office.
Infineon Technologies Components may only
be used in life-support devices or syst em s
with the express wr itten appr oval of Infineon
Technologies, if a failure of such components
can reasonably be expected to cause the fail-
ure of that life-support device or system, or to
affect the safety or effectiveness of that de-
vice or system . Life support devices or sys-
tems are intended to be implanted in the hu-
man 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 endan-
gered.
