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Type Ordering Code Package TLE 4252D
Q67006-A9669
P-TO252-5-1
如何快速学英语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 ≤ T j ≤ 150 °C
•Output protected against short circuit to GND and Battery
•Overtemperature protection •
Rever polarity proof
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.nsors in engine management systems under the vere conditions of automotive applications. Therefore the device is equipped with additional protection functions against rever 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 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 the 5V 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.
如何快速学英语
Block Diagram
Figure1Internal Circuit Blocks
Figure 2Pin Configuration (Draft, subject to alternation!)
Table 1Pin Definitions and Functions (draft, subject to alternation)Pin No.Symbol
Function
1I
Supply voltage input; Input for battery or a pre-regulated voltage of 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.3GND Ground; Connected to the heatsink of the package.4splitup
ADJ
Adjust input for tracker; Input for the reference voltage which can be connected directly or by voltage divider to the reference (e Application Information ).
5Q
Output voltage of tracker; For a stable operation to avoid ringing at the output connect a capacitor of C Q ≥ 10 µF and 0
kuner≤ ESR ≤ 5 Ω to GND.
Table2Absolute Maximum Ratings
Parameter Symbol Limit Values Unit Remarks
Min.Max.
Supply Voltage Input I
Voltage V I-4245V–
be forever什么意思Current I I––A Limited internally Enable Input EN
Voltage V EN-4245V–
Current I EN––A Limited internally Adjust Input ADJ
Voltage V ADJ-4245V–
Current I ADJ––A Limited internally Output Q
kings of leon>compulsoryVoltage V Q-245V–
Current I Q––A Limited internally Temperature
Junction temperature T j-40150°C–
Storage temperature T stg-50150°C–
ESD-Protection
Voltage V ESD-22kV Human Body Model
(HBM)
Note:Maximum ratings are absolute ratings, exceeding one of the values may cau irreversible damage to the integrated circuit!
娘胎Note:Within this operating range the IC is functional. The electrical characteristics,
however, are not guaranteed over this full range given above.
Table 3Operating Range
Parameter
Symbol
Limit Values Unit Remarks
Min.
Typ.Max.In- and Output Voltage
Supply voltage V I
3.5–40V V I > V ADJ + V dr
Enable input voltage V EN 0–40V –Adjust input voltage V ADJ 1.5–40V –
Adjust input voltage V ADJ 0– 1.5
V V Q ≤ V ADJ + ∆V Q
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Error amplifier common mode range CMR
1.5
–
V I -
0.5
V
V Q ≤ V ADJ + ∆V Q with V FB = V Q
Temperature
Junction temperature T j -40–150°C –
Thermal Resistance P-TO252-5-1
Junction to ambient R thj-a ––144K/W Footprint only 1)Junction to ambient R thj-a ––78K/W Heat sink area 300 mm 2 1)Junction to ambient R thj-a ––55K/W Heat sink area 600 mm 2 1)Junction to ca
R thj-c
–
–
2
K/W
–
1)Worst ca regarding peak temperature; zero airflow; mounted on FR4; 80 × 80 × 1.5 mm 3; 35 µ Cu; 5 µ Sn
