INFINEON TLE 4252 User Manual
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Tracking Regulator
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 ≤
• Output protected against short circuit to GND and
Battery
• Overtemperature protection
• Reverse polarity proof
T
≤ 150 °C
j
TLE 4252
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 h igh acc uracy. Th e referenc e volta ge appli ed direc tly 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 Ordering Code Package
TLE 4252 D Q67006-A9669 P-TO252-5-1
Data Sheet 1 Rev. 1.2, 2004-08-11
Block Diagram
Saturation
Control and
Protection
Circuit
TLE 4252
Temperature
Control
I
GND EN
Figure 1 Internal Circuit Blocks
Q
ADJ
TLE 4252 D
AEB03536.VSD
Data Sheet 2 Rev. 1.2, 2004-08-11
TLE 4252
TLE 4252
(P-TO252-5-1 D-Pak)
GND
1
2
I
EN
4
3
ADJ
GND
AEP03534.VSD
5
Q
Figure 2 Pin Configuration (Draft, subject to alternation!)
Table 1 Pin Definitions and Functions (draft, subject to alternation)
Pin No. Symbol Function
1I Supply voltage input; Input for battery or a pre-regulated
voltage of a e.g. DC to DC converter.
2EN Enable input for tracker; An active high signal turns on the
device, with active low the tracker is turned off.
3GNDGround; Connected to the heatsink of the package.
4ADJAdjust input for tracker; Input for the reference voltage
which can be connected directly or by voltage divider to the
reference (see Application Information).
5Q Output voltage of tracker; For a stable operation to avoid
ringing at the output connect a capacitor of
C
≥ 10 µF and
Q
0 ≤ ESR ≤ 5 Ω to GND.
Data Sheet 3 Rev. 1.2, 2004-08-11
Table 2 Absolute Maximum Ratings
Parameter Symbol Limit Values Unit Remarks
Min. Max.
Supply Voltage Input I
TLE 4252
Voltage
Current
Enable Input EN
Voltage
Current
Adjust Input ADJ
Voltage
Current
Output Q
Voltage
Current
Temperature
Junction temperature
Storage temperature
ESD-Protection
V
I
V
I
V
I
V
I
T
T
I
I
EN
EN
ADJ
ADJ
Q
Q
j
stg
-42 45 V –
– – A Limited internally
-42 45 V –
– – A Limited internally
-42 45 V –
– – A Limited internally
-2 45 V –
– – A Limited internally
-40 150 °C–
-50 150 °C–
Voltage
V
ESD
-2 2 kV Human Body Model
(HBM)
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
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