Siemens TLE4267, TLE4267S, TLE4267G Datasheet
TLE 4267
5-V Low-Drop Voltage Regulator
Features
● Output voltage tolerance ≤ ± 2 %
● Low-drop voltage
● Very low standby current consumption
● Input voltage up to 40 V
● Overvoltage protection up to 60 V (≤ 400 ms)
● Reset function down to 1 V output voltage
● ESD protection up to 2000 V
● Adjustable reset time
● On/off logic
● Overtemperature protection
● Reverse polarity protection
● Short-circuit proof
● Wide temperature range
● Suitable for use in automotive electronics
TLE 4267
Bipolar IC
P-TO220-7-3
P-TO220-7-180
Type Ordering Code Package
TLE 4267 Q67000-A9153 P-TO220-7-3
TLE 4267 G Q67006-A9169 P-TO220-7-180 (SMD)
TLE 4267 S Q67000-A9246 P-TO220-7-230
Functional Description
P-TO220-7-230
TLE 4267 is a 5-V low-drop voltage regulator in a
TO220-7 package. It supplies an output current of > 400 mA. The IC is shortcircuit-proof
and incorporates temperature protection that disables the IC at overtemperature.
Application
V
The IC regulates an inp ut voltage
in the range 5.5 V < VI<40V to V
I
reset signal is generated for an output voltage
V
of < 4.5 V. The reset delay can be set
Q
Qrated
=5.0V.A
with an external capacitor. The device has two logic inputs. It is turned-ON by a voltage
of > 4 V on E2 by th e ign itio n for ex amp le. It rem ain s ac tiv e as a func tion of the voltage
on E6, even if the voltage on E2 goes Low. This m akes it pos sible to impl ement a selfholding circuit without external components. When the device is turned-OFF, the output
voltage drops to 0 V and current consumption tends towards 0 µA.
Semiconductor Group 1 1998-11-01
TLE 4267
Design Notes for External Components
C
The input capacitor
circuit consisting of lead inductance and input capacitance can be damped by a resistor
of approx. 1 Ω in series with
regulating circuit. Stability is guaranteed at values of ≥ 22 µF and an ESR of ≤ 3 Ω within
the operating temperature range.
Circuit Description
The control amplifier compares a reference voltage, which is kept highly accurate by
resistance adjustmen t, to a voltage that is proportiona l to the output volt age and drives
the base of the series transistor via a buffer. Saturation control as a function of the load
current prevents any over-saturating of the power element.
A comparator in the reset-gen erator bloc k compa res a re ference t hat is ind epende nt of
the input voltage to the scaled-down output voltage. If this reaches a value of 4.5 V, the
reset-delay capacitor is discharged and then the reset output is set Lo w. As the output
voltage increases again, the reset-delay capacitor is charged with constant current from
V
= 4.5 V onwards. When the capacitor voltage reaches the upper switching threshold,
Q
reset goes High again. The reset delay can be set within wide range by selection of the
external capacitor.
is necessary for compensation line influences. The resonant
I
C
. The output capacitor is necessary for the stability of the
I
With the integrated turn-ON/turn-OFF logic it is simple to imp lement delayed turn-OFF
without external components.
Truth Table for Turn-ON/Turn-OFF Logic
Pin 2 Pin 6
V
Q
Remarks
L X OFF Initial state, pin 6 internally pulled up
H X ON Regulator switched on via pin 2, by ignition for example
H L ON Pin 6 clamped active to ground by controller while pin 2 is still
high
X L ON Previous state remains, even ignition is shut off: self-holding
state
L L ON Ignition shut off while regulator is in self-holding state
L H OFF Regulator shut down by releasing of pin 6 while pin 2 remains
Low, final state. No active clamping required by external self-
holding circuit (µC) to keep regulator shut off.
Pin 2: (Inhibit, E2) Enable function, active High
Pin 6: (Hold, E6) H old and relea se func tio n, activ e Low
Semiconductor Group 2 1998-11-01
Pin Configuration
(top view)
TLE 4267
P-TO220-7-3 P-TO220-7-230
43215
6
7
Ι
R
E2
GND
D
E6
AEP01481
Q
P-TO220-7-180
Ι
E2
R
D
GND
7651234
E6
AEP01724
4321567
Ι
R
D
E2
GND
E6
Q
AEP02123
Pin Definitions and Functions
Pin Symbol Function
1
I Input; block to ground directly at the IC by a ceramic capacitor
2E2Inhibit; device is turned-ON by High signal on this pin; internal
pulldown resistor of 100 kΩ
3RReset Output; open-collector output internally connected to
the output via a resistor of 30 kΩ
4GNDGround; connected to rear of chip
5DReset Delay; connect with capacitor to GND for setting delay
6E6Hold; see truth table above for function; this input is connected
to output voltage across pullup resistor of 50 kΩ
7Q5-V Output; block to GND with 22-µF capacitor, ESR < 3 Ω
Semiconductor Group 3 1998-11-01
TLE 4267
1
In-
put
Adjustment
Block Diagram
Temperature
Sensor
Bandgap
Reference
Turn-ON/Turn-OFF
Amplifier
Logic
2
Control
E6 HoldInhibit
6
Buffer
Saturation
Control and
Protection Circuit
4
GND
Reset
Generator
7
5V
Output
5
Reset
Delay
3
Reset
Output
AEB01482
Absolute Maximum Ratings
T
= – 40 to 150 °C
J
Parameter Symbol Limit Values Unit Notes
min. max.
Input
Voltage
Voltage
Current
V
V
I
I
I
I
– 42 42 V –
–60Vt ≤ 400 ms
– – – Limited internally
Reset Output
Voltage
Current
V
I
R
R
– 0.3 7 V –
– – – Limited internally
Reset Delay
Voltage
V
d
– 0.3 42 V –
Semiconductor Group 4 1998-11-01
Absolute Maximum Ratings (cont’d)
T
= – 40 to 150 °C
J
Parameter Symbol Limit Values Unit Notes
min. max.
TLE 4267
Current
Output
Voltage
Current
Inhibit
Voltage
Current
Hold
Voltage
Current
GND
Current
I
d
V
I
Q
V
I
E2
V
I
E6
I
GND
Q
E2
E6
––––
– 0.3 7 V –
– – – Limited internally
– 42 42 V
– 5 5 mA t ≤ 400 ms
– 0.3 7 V –
– – mA Limited internally
– 0.5 – A –
Temperatures
Junction temperature
Storage temperature
T
J
T
stg
–150°C–
– 50 150 °C–
Operating Range
Parameter Symbol Limit Values Unit Notes
min. max.
Input voltage
Junction temperature
V
T
I
J
5.5 40 V see diagram
– 40 150 °C–
Thermal Resistance
Junction ambient
Junction-case
Junction-case
R
R
R
thja
thjc
thjc
–70K/W–
–6K/W–
–2K/Wt < 1 ms
Semiconductor Group 5 1998-11-01
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