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5-V Low Drop Fixed Voltage Regulator
Features
• Output voltage tolerance ≤ ±2%
• 650 mA output current capability
• Low-drop voltage
• Reset functionality
• Adjustable reset time
• Suitable for use in automotive electronics
• Integrated overtemperature protection
• Reverse polarity protection
• Input voltage up to 42 V
• Overvoltage protection up to 65 V (≤ 400 ms)
• Short-circuit proof
• Wide temperature range
• ESD protection: ±2kV HBM
• Green Product (RoHS compliant)
• AEC Qualified
1)
TLE 4270-2
P-TO252-5-1
Functional Description
This device is a 5-V low drop fixed-voltage regulator. The maximum input voltage is 42 V
(65 V, ≤ 400 ms). Up to an input voltage of 26 V and for an output current up to 650 mA
it regulates the output voltage within a 2% accuracy. The short circuit protection limits
the output current of more than 650 mA. The device incorporates overvoltage protection
and a temperature protection which turns off the device at high temperatures.
1) ESD susceptibility, Human Body Model (HBM) according to EIA/JESD 22-A114B
Type Package
TLE 4270-2 G PG-TO263-5-1
TLE 4270-2 D PG-TO252-5-11
Data Sheet 1 Rev. 1.8, 2007-11-09
TLE 4270-2
PG-TO263-5-1
15
RO
GNDDQ
Ι
AEP01922
Figure 1 Pin Configuration (top view)
Table 1 Pin Definitions and Functions
Pin Symbol Function
PG-TO252-5
GND
15
ROΙ DQ
AEP02580
1I Input; block to ground directly at the IC with a ceramic capacitor.
2RO Reset Output; the open collector output is connected to the
5-V output via an integrated resistor of 30 kΩ.
3GNDGround; internally connected to heatsink.
4D Reset Delay; connect a capacitor to ground for delay time adjustment.
5Q 5-V Output; block to ground with 22 µF capacitor, ESR < 3 Ω.
Data Sheet 2 Rev. 1.8, 2007-11-09
TLE 4270-2
Circuit Description
The control amplifier compares a reference voltage, which is kept highly accurate by
resistance adjustment, to a voltage that is proportional to the output voltage and drives
the base of a series transistor via a buffer. Saturation control as a function of the load
current prevents any over-saturation of the power element.
The IC also incorporates a number of internal circuits for protection against:
• Overload
• Overvoltage
• Overtemperature
• Reverse polarity
Application Description
The IC regulates an input voltage in the range of 5.5 V <
V
< 36 V to V
I
=5.0V. Up
Q,nom
to 26 V it produces a regulated output current of more than 650 mA. Above 26 V the
save-operating-area protection allows operation up to 36 V with a regulated output
current of more than 300 mA. Overvoltage protection limits operation at 42 V. The
overvoltage protection hysteresis restores operation if the input voltage has dropped
below 36 V. A reset signal is generated for an output voltage of
V
< 4.5 V. The delay for
Q
power-on reset can be set externally with a capacitor.
Data Sheet 3 Rev. 1.8, 2007-11-09
TLE 4270-2
1
I
Temperature
Adjustment
Sensor
Bandgap
Reference
Control
Amplifier
3
GND
Saturation
Control and
Protection
Circuit
Buffer
Reset
Generator
5
2
4
AEB01924
Q
RO
D
Figure 2 Block Diagram
Data Sheet 4 Rev. 1.8, 2007-11-09
Table 2 Absolute Maximum Ratings
T
= -40 to 150 °C
j
Parameter Symbol Limit Values Unit Notes
Min. Max.
Input I
TLE 4270-2
Voltage
Voltage
Current
Reset Output RO
Voltage
Current
Reset Delay D
Voltage
Current
Output Q
Voltage
Current
Ground GND
Current
Temperatures
Junction temperature
Storage temperature
V
V
I
I
V
I
RO
V
I
D
V
I
Q
I
GND
T
T
I
I
RO
D
Q
j
stg
-42
–
–
-0.3
–
-0.3
–
-1.0
–
42
65
–
7
–
7
–
16
–
V
V
–
V
–
V
–
V
–
-0.5 – A –
–
-50
150
150
°C
°C
–
t ≤ 400 ms
internally limited
–
Internally limited
–
Internally limited
–
Internally limited
–
–
Table 3 Operating Range
Parameter Symbol Limit Values Unit Notes
Min. Max.
Input voltage V
Junction temperature
T
I
j
642V–
-40 150 °C–
Thermal Resistance
Junction ambient
Junction case R
1) Mounted on PCB, 80 × 80 × 1.5 mm3; 35µ Cu; 5µ Sn; Footprint only; zero airflow.
Data Sheet 5 Rev. 1.8, 2007-11-09
R
thj-a
thj-c
–6579K/W
K/W
–
TO263, TO252
1)
– 3 K/W TO-263 Packages
TLE 4270-2
Table 4 Characteristics
V
= 13.5 V; -40 °C ≤ Tj ≤ 125 °C (unless otherwise specified)
I
Parameter Symbol Limit Values Unit Test Condition
Min. Typ. Max.
Output voltage
Output voltage
Output current
V
V
I
Qmax
limiting
Current
I
q
consumption
I
= II - I
q
Current
Q
I
q
consumption
I
= II - I
q
Current
Q
I
q
consumption
I
= II - I
q
Drop voltage
Q
V
Load regulation ∆V
Q
Q
DR
Q,Lo
4.90 5.00 5.10 V 5 mA ≤ IQ ≤ 550 mA;
6 V ≤
V
≤ 26 V
I
4.90 5.00 5.10 V 26 V ≤ VI ≤ 36 V;
I
≤ 300 mA
Q
650 850 – mA VQ = 0 V
–11.5mAIQ = 5 mA
–5575mAIQ = 550 mA
–7090mAIQ = 550 mA; VI = 5 V
– 350 700 mV IQ = 550 mA
1)
–2550mVIQ = 5 to 550 mA;
V
= 6 V
I
Line regulation ∆
Power supply Ripple
rejection
V
Q,Li
–1225mVVI = 6 to 26 V
PSRR –54–dBf
I
= 5 mA
Q
= 100 Hz;
r
V
= 0.5 Vpp
r
Reset Generator
Switching threshold
Reset High voltage
Reset low voltage
Reset low voltage
Reset pull-up
V
V
V
V
R
RT
ROH
ROL
ROL
int
4.5 4.65 4.8 V –
4.5 – – V –
–60–mVR
= 30 kΩ2);
int
1.0 V ≤
V
≤ 4.5 V
Q
– 200 400 mV IR = 3 mA, VQ = 4.4 V
18 30 46 kΩ internally connected
to Q
Charge current
Data Sheet 6 Rev. 1.8, 2007-11-09
I
D,c
81425µA VD = 1.0 V
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