Low-Drop Voltage Regulator
TLE 4276
Semiconductor Group
1
1998-11-01
Features
Output voltage tolerance
4%
Low-drop voltage
Inhibit input
Very low current consumption
Short-circuit-proof
Reverse polarity proof
Suitable for use in automotive electronics
SMD = Surface Mounted Device
w
New type
Type
Ordering Code Package
TLE 4276 V50
Q67000-A9262 P-TO220-5-3
TLE 4276 V85
Q67000-A9263 P-TO220-5-3
TLE 4276 V10
Q67000-A9264 P-TO220-5-3
TLE 4276 G V50 Q67006-A9266 P-TO220-5-122
TLE 4276 G V85 Q67006-A9268 P-TO220-5-122
TLE 4276 G V10 Q67006-A9270 P-TO220-5-122
TLE 4276 S V50 Q67000-A9267 P-TO220-5-43
TLE 4276 S V85 Q67000-A9269 P-TO220-5-43
TLE 4276 S V10 Q67000-A9271 P-TO220-5-43
TLE 4276 V
Q67000-A9265 P-TO220-5-3
TLE 4276 SV
Q67000-A9273 P-TO220-5-43
TLE 4276 GV
Q67006-A9272 P-TO220-5-122
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TLE 4276 D V50 Q67006-A9358 P-TO252-5-1
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TLE 4276 DV
Q67006-A9361 P-TO252-5-1
P-TO220-5-3
P-TO220-5-43
P-TO220-5-122
P-TO252-5-1 (D-PAK)
TLE 4276
Semiconductor Group
2
1998-11-01
Functional Description
The TLE 4276 is a low-drop voltage regulator in a TO220 package. The IC regulates an
input voltage up to 40 V to
V
Qrated
= 5.0 V (V50), 8.5 V (V85), 10 V (V10) and adjustable
voltage (V). The maximum output current is 400 mA. The IC can be switched off via the
inhibit input, which causes the current consumption to drop below 10
A. The IC is short-
circuit-proof and incorporates temperature protection that disables it at over-tempera-
ture.
Dimensioning Information on External Components
The input capacitor
C
I
is necessary for compensating line influences. Using a resistor of
approx. 1
in series with
C
I
, the oscillating of input inductivity and input capacitance can
be damped. The output capacitor
C
Q
is necessary for the stability of the regulation circuit.
Stability is guaranteed at values
C
Q
22
F and an ESR of
3
within the operating
temperature range.
Circuit Description
The control amplifier compares a reference voltage to a voltage that is proportional to the
output voltage and drives the base of the series transistor via a buffer. Saturation control
as a function of the load current prevents any oversaturation of the power element. The
IC also incorporates a number of internal circuits for protection against:
Overload
Overtemperature
Reverse polarity
TLE 4276
Semiconductor Group
3
1998-11-01
Pin Configuration
(top view)
Figure 1
Pin Definitions and Functions
Pin No.
Symbol Function
1
I
Input; block to ground directly at the IC with a ceramic capacitor.
2
INH
Inhibit; low-active input
3
GND
Ground
4
N.C.
VA
Not connected for V50, V85, V10
Voltage Adjust Input; only for adjustable output from external
voltage divider.
5
Q
Output; block to ground with a
22
F capacitor.
Q
GND
N.C.
INH
1
5
AEP02041
(VA)
GND
INH
(VA)
AEP02042
N.C.
Q
1
5
1
5
GND
INH
AEP02043
N.C.
Q
AEP02560
1
5
INH
N.C.
Q
(VA)
GND
P-TO220-5-3
P-TO220-5-43
P-TO252-5-1
P-TO220-5-122
TLE 4276
Semiconductor Group
4
1998-11-01
Figure 2
Block Diagram
1
AEB02044
GND
3
Q
6
Bandgap
Reference
Control
Amplifier
Sensor
Temperature
Buffer
Saturation
Control and
Protection
Circuit
VA
4
INH
2
*)
**)
For fixed Voltage Regulator only
For adjustable Voltage Regulator only
**)
*)
TLE 4276
Semiconductor Group
5
1998-11-01
Note: Maximum ratings are absolute ratings; exceeding any one of these values may
cause irreversible damage to the integrated circuit.
Absolute Maximum Ratings
T
j
= 40 to 150
C
Parameter
Symbol
Limit Values
Unit Test Condition
min.
max.
Voltage Regulator
Input
Voltage
V
I
42
45
V
Current
I
I
Internally limited
Inhibit
Voltage
V
INH
42
45
V
Voltage Adjust Input
Voltage
V
VA
0.3
10
V
Output
Voltage
V
Q
1.0
40
V
Current
I
Q
Internally limited
Ground
Current
I
GND
100
mA
Temperature
Junction temperature
T
j
150
C
Storage temperature
T
stg
50
150
C
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