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Low Drop Voltage Tracker
TLE 4251
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 Ordering Code Q67006-A9439 Q67006-A9529 Package P-TO252-5-1 P-TO263-5-1
P-TO263-5-1
P-TO252-5-1
Type TLE 4251 D TLE 4251 G
Functional Description The TLE 4251 is a monolithic integrated low-drop voltage tracker in the very small SMD package P-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 over load, 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 Rev. 2.4
1
2001-05-07
TLE 4251
P-TO252-5-1
P-TO263-5-1
GND
1
5 1 5
I
EN
ADJ
Q
AEP02810
I
EN GND ADJ
Q
AEP03119
Figure 1
Pin Configuration (top view)
Pin No. 1 2 3 4 5
Symbol I EN GND ADJ Q
Function Input voltage Enable, high-active input Ground Adjust; connect to the reference voltage via ext. resistor or micro-controller port Output voltage; must be blocked by a capacitor CQ 22 F, ESR 3 to GND
Data Sheet Rev. 2.4
2
2001-05-07
TLE 4251
TLE 4251 Saturation Control and Protection Circuit
Temperature Control
I
ADJ EN GND
AES02807
Figure 2
Block Diagram
Data Sheet Rev. 2.4
3
2001-05-07
TLE 4251
Absolute Maximum Ratings - 40 C < Tj < 150 C Parameter Symbol Limit Values min. Input Voltage Current Output Voltage Current Adjust Voltage Current Enable Voltage Current Temperatures Junction temperature Storage temperature Thermal Resistances Junction case Junction ambient Junction case Junction ambient
1)
Unit
Remarks
max.
VI II
- 42 -
45 -
V mA
- internally limited
VQ IQ
-2 -
45 -
V mA
- internally limited
VADJ IADJ
- 42 -
45 -
V A
- internally limited
VEN IEN
- 42 -
45 -
V A
- internally limited
Tj Tstg
- 40 - 50
150 150
C C
- -
Rthjc Rthja Rthjc Rthja
- - - -
4 78 3 52
K/W K/W K/W K/W
TLE 4251 D TLE 4251 D1) TLE 4251 G TLE 4251 G1)
Worst case, regarding peak temperature; zero airflow; mounted an a PCB 80 300 mm2 .
x 80 x 1.5 mm3, heat sink area
Note: Maximum ratings are absolute ratings; exceeding any one of these values may cause irreversible damage to the integrated circuit.
Data Sheet Rev. 2.4 4 2001-05-07
TLE 4251
Operating Range Parameter Input voltage Adjust input voltage Adjust input voltage Enable input voltage Junction temperature
1)
Symbol
Limit Values min. max. 40 40 2.5 40 150 4 0 0 - 40
1)
Unit V V V V C
Remarks - -
VI VADJ VADJ VEN Tj
2.5
VQ VADJ + VQ
- -
VI > VADJ + VDR
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 min. Output Output voltage tracking accuracy VQ = VADJ - VQ Output voltage tracking accuracy Output voltage tracking accuracy Drop voltage typ. max. Unit Test Condition
VQ VQ VQ Vdr
- 10
-
10
mV
- 10 - 25 -
- - 280
10 25 520
mV mV mV
VI < 13.5 V; - 40 C< Tj < 125 C; 1 mA < IQ < 300 mA 6 V < VI < 40 V 5 mA < IQ < 200 mA 6 V < VI < 28 V 1 mA < IQ < 300 mA IQ = 300 mA; VADJ > 4 V;
Enable ON;1)
Output current Output capacitor Current consumption Iq = II - IQ Current consumption Iq = II - IQ
IQ
CQ
400 22 - -
450 - 10 230
800 - 20 300
mA F mA A
Tj 125 C1)
ESR 3 at 10 kHz
Iq Iq
IQ = 300 mA IQ < 1 mA Tj < 85 C VEN in ON state
2001-05-07
Data Sheet Rev. 2.4
5
TLE 4251
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 Quiescent current (stand-by) Iq = II - IQ Regulator Performance Load regulation Line regulation Power-Supply-RippleRejection Adjust Input Input biasing current Enable Enable on voltage range Enable off voltage range Input current
1)
Symbol
Limit Values min. typ. 0 max. 10 -
Unit Test Condition A
Iq
VEN = 0 V Tj < 85 C
VQ VQ PSRR
- 35 - 25 60
5 10 -
35 25 -
mV mV dB
5 mA < IQ < 300 mA;
VI = 6 V, VADJ = 5 V
12 V < VI < 32 V
IQ = 5 mA fr = 100 Hz; Vr = 5 VPP
IADJ
-
0.1
0.5
A
VADJ = 5 V
VEN ON VEN OFF IEN
2 - 5
- - 40
- 0.5 70
V V A
VQ ON VQ 0.1 V VEN = 5 V
Measured when the output voltage VQ has dropped 100 mV from the nominal value.
Data Sheet Rev. 2.4
6
2001-05-07
TLE 4251
Application Information
6...40 V
I
100 nF TLE 4251
e.g. TLE 4470 TLE 4269 TLE 4278 GND
C Q 22 F
VCC
I/O
Saturation Control and Protection Circuit
Temperature Control
I
Q
LOAD to sensor 22 F 100 nF
ADJ
C
100 nF GND
EN
AES02808
Figure 3
Application Circuit
Data Sheet Rev. 2.4
7
2001-05-07
TLE 4251
Quiescent Current Iq versus Output Current IQ
30
AED02900
Enable Current IEN versus Enable Voltage VEN
30 A 25
AED02901
Iq mA
25
IENABLE
20
20
15
15
10
10
5
5
0
0
100
200
300
mA 450
0
0
0.5
1
1.5
2
2.5
3
3.5 V 4
IQ
VENABLE
Tracking Accuracy VQ versus Temperature Tj, VADJ = 5 V
6 mV 4
AED02902
Current Consumption Iq versus Input Voltage VI, VADJ = 5 V
400
AED02904
VQ
Iq A
VI = 6 V IQ = 300 mA
350
2
300
0
IQ = 10 mA
250
-2
VI = 40 V IQ = 200 mA
200
IQ = 1 mA
-4
-6 -40
0
40
80
120 C 160
150
0
5 10 15 20 25 30 35
V 45
Tj
V
Data Sheet Rev. 2.4
8
2001-05-07
TLE 4251
Tracking Accuracy VQ versus Output Current IQ
3 mV 2.5
AED02903
VQ
2
VADJ = 5 V VADJ = 3 V
1.5
1
0.5
0
0
100
200
300
400 mA 500
IQ
Data Sheet Rev. 2.4
9
2001-05-07
TLE 4251
Package Outlines P-TO252-5-1 (Plastic Transistor Single Outline)
6.5 +0.15 -0.10 2.3 +0.05 -0.10 B A 1 0.1 0...0.15 0.9 +0.08 -0.04
1 0.1
5.4 0.1
9.9 0.5 6.22 -0.2
0.8 0.15
(4.17)
0.15 max per side
0.51 min
5x0.6 0.1 1.14
0.5 +0.08 -0.04 0.1
4.56
0.25
M
AB
GPT09161
All metal surfaces tin plated, except area of cut.
Data Sheet Rev. 2.4
10
2001-05-07
TLE 4251
P-TO263-5-1 (Plastic Transistor Single Outline)
10 0.2 9.8 0.15 A 8.5 1) 1.27 0.1 B 0.1 2.4 4.4
9.25 0.2
10.3
0.05
(15)
8 1)
0...0.15 5x0.8 0.1 4x1.7
0.5 0.1
4.7 0.5
0.25
1)
M
AB
2.7 0.3
8 max.
0.1
Sorts of Packing Package outlines for tubes, trays etc. are contained in our Data Book "Package Information". SMD = Surface Mounted Device Data Sheet Rev. 2.4 11
Dimensions in mm 2001-05-07
GPT09113
Typical All metal surfaces tin plated, except area of cut.
TLE 4251
Edition 2001-05-07 Published by Infineon Technologies AG, St.-Martin-Strasse 53, D-81541 Munchen
(c) Infineon Technologies AG 2001.
All Rights Reserved. Attention please! The information herein is given to describe certain components and shall not be considered 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 noninfringement, regarding circuits, descriptions and charts stated herein. Infineon Technologies is an approved CECC manufacturer. Information For further information on technology, delivery terms and conditions and prices please contact your nearest Infineon Technologies Office in Germany or our Infineon Technologies Representatives worldwide (see address list). Warnings Due to technical requirements components may contain dangerous substances. For information on the types in question please contact your nearest Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems 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.
Data Sheet Rev. 2.4
12
2001-05-07

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