5-V Low Drop Voltage Regulator
TLE 7272
Features
•
•
•
•
•
•
•
•
Output voltage 5 V
±2%
Ultra low current consumption: typ. 25µA
300 mA current capability
Inhibit input
Reset
Very low-drop voltage
Short-circuit-proof
Suitable for use in automotive electronics
P-TO252-5-1
Functional Description
The TLE 7272 is a monolithic integrated low-drop
voltage regulator for load currents up to 300 mA. An input
voltage up to 42 V is regulated to
V
Q,nom
= 5.0 V with a
precision of
±2%.
Due to its integrated reset circuitry
featuring power on timing and output voltage monitoring
P-TO263-5-1
the IC is well suited as
µ-controller
supply. The
sophisticated design allows to achieve stable operation
even with ceramic output capacitors down to 470 nF. The
device is designed for the harsh environment of automotive applications. Therefore it is
protected against overload, short circuit and overtemperature conditions. Of course the
TLE 7272 can be used also in all other applications, where a stabilized 5 V voltage is
required. Due to its ultra low stand-by current consumption of typ. 20
µA
the TLE 7272
is dedicated for use in applications permanently connected to
V
BAT
. In addition the IC can
be switched off via the Inhibit input reducing the current consumption to typ. 5
µA.
An
integrated output sink current circuitry keeps the voltage at the Output pin Q below 5.5
V even when reverse currents are applied. Thus connected devices are protected from
overvoltage damage. For applications requiring extremely low noise levels the Infineon
voltage regulator family TLE 42XY and TLE 44XY is more suited than the TLE 7272. A
mV-range output noise on the TLE 7272 caused by the charge pump operation is
unavoidable due to the ultra low quiescent current concept.
Type
TLE 7272 D
TLE 7272 G
Data Sheet
Ordering Code
Q67006-A9734
Q67006-A9735
1
Package
P-TO252-5
P-TO263-5
Rev. 1.1, 2005-07-30
TLE 7272
Reset
The Reset pin informs e.g. the microcontroller in case the output voltage has fallen below
the lower threshold
V
RT
of typ. 4.65 V. The hysteresis is typically 100mV. Connecting the
regulator to a battery voltage at first the reset signal remains LOW. When the output
voltage has reached the reset threshold
V
RT
the reset output RO remains still LOW for
the reset delay time
t
rd
(typ. 16 ms). Afterwards the reset output turns HIGH.
1
TLE 7272
5
Q
Overtemperature
Shutdown
Bandgap
Reference
Reset
Generator
2
RO
1
4
Inhibit
Charge
Pump
3
GND
AEB03523.VSD
Figure 1
Block Diagram
Data Sheet
2
Rev. 1.1, 2005-07-30
TLE 7272
GND
I
RO
INH
Q
AEP02825_7272
Ι
GND Q
RO INH
IEP02528
Figure 2
Table 1
Pin No.
1
2
I
RO
Pin Configuration P-TO252-5 (D-PAK), P-TO263-5 (D
2
-PAK)(top
view)
Pin Definitions and Functions
Symbol
Function
Input;
block to ground directly at the IC with a ceramic capacitor.
Reset Output;
Open Collector Output with integrated pull-up
resistor of typically 30kΩ. Optional external pull-up resistor of
≥
10 kΩ to pin Q.
Ground;
Pin 3 internally connected to heatsink.
Inhibit Input;
low level disables the IC. Integrated pull-down
resistor.
Output;
block to ground with a ceramic capacitor,
C
≥
470 nF.
3
4
5
GND
INH
Q
Data Sheet
3
Rev. 1.1, 2005-07-30
TLE 7272
Table 2
Parameter
Input I
Voltage
Current
Output Q
Voltage
Voltage
Current
Absolute Maximum Ratings
Symbol
Limit Values
Min.
Max.
45
–
5.5
6.2
–
5.5
6.2
1
45
1
150
150
V
mA
V
V
mA
V
V
mA
V
mA
°C
°C
–
–
–
Unit Test Condition
V
I
I
I
V
Q
V
Q
I
Q
V
RO
V
RO
I
RO
V
INH
I
INH
T
j
T
stg
-0.3
-1
-0.3
-0.3
-1
-0.3
-0.3
-1
-0.3
-1
-40
-50
t
< 10 s
1)
–
–
Reset Output RO
Voltage
Voltage
Current
Inhibit Input INH
Voltage
Current
Temperature
Junction temperature
Storage temperature
–
–
Observe current
limit
I
INHmax2)
–
t
< 10 s
1)
–
1) Exposure to these absolute maximum ratings for extended periods (
t
> 10 s) may affect device reliability.
2) External resistor required to keep the current below the absolute maximum rating when voltages
≥
5.5 V are
applied.
Note: Stresses above those listed here may cause permanent damage to the device.
Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Data Sheet
4
Rev. 1.1, 2005-07-30
TLE 7272
Table 3
Parameter
Input voltage
Operating Range
Symbol
Limit Values
Min.
Max.
42
150
V
°C
–
–
5.5
-40
Unit Remarks
Junction temperature
V
I
T
j
Note: In the operating range, the functions given in the circuit description are fulfilled.
Table 4
Parameter
Junction case
Junction ambient
Junction ambient
1)
area 300 mm
2
2) Worst case, regarding peak temperature; zero airflow; mounted on a PCB FR4, 80
area 300 mm
2
Thermal Resistance
Symbol
Limit Values
Min.
Max.
8
80
55
K/W –
K/W TO252
1)
–
–
–
Unit Remarks
K/W TO263
2)
Worst case, regarding peak temperature; zero airflow; mounted on a PCB FR4, 80
×
80
×
1.5 mm
3
, heat sink
×
80
×
1.5 mm
3
, heat sink
R
thj-c
R
thj-a
R
thj-a
Data Sheet
5
Rev. 1.1, 2005-07-30
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