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Tracking Regulator
TLE 4252
Features * * * * * * * * * * Output tracking tolerance to reference 0.2% Output voltage adjust down to 1.5 V 250 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 to GND and Battery Overtemperature protection Reverse polarity proof
P-TO252-5-1
Short Functional Description The TLE 4252 is a monolithic integrated low-drop voltage tracking regulator in a very small SMD package P-TO252-5-1. It is designed to supply off-board systems, e.g. sensors in engine management systems under the severe conditions of automotive applications. Therefore the device is equipped with additional protection functions against reverse polarity and short circuit to GND and battery. With supply voltages up to 40 V the output voltage follows a reference voltage applied at the adjust input with high accuracy. The reference voltage applied directly to the adjust input or by an e.g. external resistor divider can be 1.5 V at minimum. The output is able to drive loads up to 250 mA at minimum while they follow e.g. the 5 V output of a main voltage regulator as reference with high accuracy. The TLE 4252 tracker can be switched into stand-by mode to reduce the current consumption to very low values. This feature makes the IC suitable for low power battery applications.
Type TLE 4252 D
Data Sheet
Ordering Code Q67006-A9669
1
Package P-TO252-5-1
Rev. 1.2, 2004-08-11
TLE 4252
Block Diagram
Saturation Control and Protection Circuit
Temperature Control
I
Q
ADJ GND TLE 4252 D
AEB03536.VSD
EN
Figure 1
Internal Circuit Blocks
Data Sheet
2
Rev. 1.2, 2004-08-11
TLE 4252
TLE 4252 (P-TO252-5-1 D-Pak) GND
1
2
3
4
5
EN
GND
I
AEP03534.VSD
Figure 2 Table 1 Pin No. 1 2 3 4 I
Pin Configuration (Draft, subject to alternation!) Pin Definitions and Functions (draft, subject to alternation) Symbol Function Supply voltage input; Input for battery or a pre-regulated voltage of a e.g. DC to DC converter. Enable input for tracker; An active high signal turns on the device, with active low the tracker is turned off. Ground; Connected to the heatsink of the package. Adjust input for tracker; Input for the reference voltage which can be connected directly or by voltage divider to the reference (see Application Information). Output voltage of tracker; For a stable operation to avoid ringing at the output connect a capacitor of CQ 10 F and 0 ESR 5 to GND.
EN GND ADJ
5
Q
Data Sheet
3
ADJ
Q
Rev. 1.2, 2004-08-11
TLE 4252
Table 2 Parameter
Absolute Maximum Ratings Symbol Limit Values Min. Max. 45 - 45 - 45 - 45 - 150 150 2 V A V A V A V A C C kV - Limited internally - Limited internally - Limited internally - Limited internally - - Human Body Model (HBM) Unit Remarks
Supply Voltage Input I Voltage Current Enable Input EN Voltage Current Adjust Input ADJ Voltage Current Output Q Voltage Current Temperature Junction temperature Storage temperature ESD-Protection Voltage
VI II VEN IEN VADJ IADJ VQ IQ Tj Tstg VESD
-42 - -42 - -42 - -2 - -40 -50 -2
Note: Maximum ratings are absolute ratings, exceeding one of these values may cause irreversible damage to the integrated circuit!
Data Sheet
4
Rev. 1.2, 2004-08-11
TLE 4252
Table 3 Parameter
Operating Range Symbol Limit Values Min. Typ. - - - - - Max. 40 40 40 1.5 V V V V V Unit Remarks
In- and Output Voltage
VI Enable input voltage VEN Adjust input voltage VADJ Adjust input voltage VADJ Error amplifier CMR
Supply voltage common mode range Temperature Junction temperature Tj Junction to ambient Junction to ambient Junction to ambient Junction to case
3.5 0 1.5 0 1.5
VI > VADJ + Vdr
- -
VI 0.5
VQ VADJ + VQ VQ VADJ + VQ with VFB = VQ
- Footprint only1) Heat sink area 300 mm2 1) Heat sink area 600 mm2 1) -
-40 - - - -
- - - - -
150 144 78 55 2
C K/W K/W K/W K/W
Thermal Resistance P-TO252-5-1
Rthj-a Rthj-a Rthj-a Rthj-c
1) Worst case regarding peak temperature; zero airflow; mounted on FR4; 80 x 80 x 1.5 mm3; 35 Cu; 5 Sn
Note: Within this operating range the IC is functional. The electrical characteristics, however, are not guaranteed over this full range given above.
Data Sheet
5
Rev. 1.2, 2004-08-11
TLE 4252
Table 4
Electrical Characteristics
VI = 13.5 V; 1.5 V VADJ VI - 0.6 V; -40 C < Tj < 150 C; unless otherwise specified
Parameter Symbol Limit Values Min. Output voltage tracking accuracy VQ = VADJ - VQ Output voltage tracking accuracy VQ = VADJ - VQ Drop voltage VQ -10 Typ. - Max. 10 mV 4.5 V < VI < 26 V; 1 mA < IQ < 200 mA; 3.5 V < VI < 32 V; 10 mA < IQ < 100 mA; 3.5 V < VI < 4.5 V; 1 mA < IQ < 200 mA; Unit Test Condition
Regulator Performance, Tracker Output Q
VQ
-10 -25
- - 280
10 25 600
mV mV mV
Vdr
-
Output current Output capacitor Current consumption Iq = II - IQ Current consumption Iq = II - IQ Quiescent current (stand-by) Iq = II - IQ Reverse current Load regulation Line regulation Power supply ripple rejection
IQ CQ Iq Iq Iq
250 10 - - -
350 - 10 100 0
500 - 25 150 2
mA F mA A A
IQ = 200 mA; VADJ > 3.5 V; VEN = VEN, on1) VQ = 5.0 V2)
0 ESR 5 at 10 kHz
Ir
VQ VQ
- - - -
0.5 - - 60
5 10 10 -
mA mV mV dB
PSSR
IQ = 200 mA; VQ = 5 V IQ < 100 A; Tj < 85 C; VEN = 5 V VEN = 0 V; VEN/ADJ = 0 V; Tj < 85 C VQ = 16 V; VI = 0 V 1 mA < IQ < 200 mA 5 V < VI < 32 V; IQ = 5 mA fI, ripple = 100 Hz; VI, ripple = 0.5 Vpp3)
Data Sheet
6
Rev. 1.2, 2004-08-11
TLE 4252
Table 4
Electrical Characteristics (cont'd)
VI = 13.5 V; 1.5 V VADJ VI - 0.6 V; -40 C < Tj < 150 C; unless otherwise specified
Parameter Adjust Input ADJ Input biasing current Enable Input EN Device on voltage range Device off voltage range Input current Symbol Limit Values Min. Typ. 0.1 - - 2 1.5 Max. 0.5 40 0.8 5 - A V V A M Unit Test Condition
IADJ VEN, on VEN, off
- 2.0 0 -1 -
VADJ = 5 V VQ settled VQ < 0.1 V VEN = 5 V
-
IEN EN pull-down resistor REN
1) Measured when the output voltage VQ has dropped 100 mV from the nominal value. 2) The current limit depends also on the input voltage, see graph output current vs. input voltage in the diagrams section. 3) Specified by design. Not subject to production test.
Data Sheet
7
Rev. 1.2, 2004-08-11
TLE 4252
Application Information
VBAT I
Main C Supply e.g. TLE 4271-2 TLE 4278 TLE 4470 etc. GND
Q
VDD R1ADJ
C e.g. C167
R2ADJ
I/O
4
EN ADJ TLE 4252 D Q
5
VQ < VREF
1
I
GND
AEA03535.VSD
Figure 3
Application Circuit: Output Voltage < Reference Voltage
Figure 3 shows a typical application circuit with VQ < VREF. Of course, also VQ = VREF is feasible by directly connecting the reference pin of the TLE 4252 D to the appropriate voltage level without voltage divider. The output voltage calculates to:
R 2ADJ V Q = V REF x ----------------------------------- R 1ADJ + R 2ADJ
(1)
Data Sheet
8
Rev. 1.2, 2004-08-11
TLE 4252
Diagrams Output Current Limit IQ versus Input Voltage VI
IQ1,2
500 mA 400
AED03537.VSD
Tj = 25C
300
200
100
0
0
10
20
30
40 V 50
VI1,2
Data Sheet
9
Rev. 1.2, 2004-08-11
TLE 4252
Package Outlines
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.
Figure 4
P-TO252-5-1 (Plastic Transistor Single Outline)
You can find all of our packages, sorts of packing and others in our Infineon Internet Page "Products": http://www.infineon.com/products. SMD = Surface Mounted Device Data Sheet 10 Dimensions in mm Rev. 1.2, 2004-08-11
Edition 2004-08-11 Published by Infineon Technologies AG, St.-Martin-Strasse 53, 81669 Munchen, Germany
(c) Infineon Technologies AG 2004.
All Rights Reserved. Attention please! The information herein is given to describe certain components and shall not be considered as a guarantee of 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. Information For further information on technology, delivery terms and conditions and prices please contact your 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 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.

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