Low-Drop Voltage Regulator
TLE 4276
Data Sheet Version 2.2
1
2000-10-11
P-TO220-5-3
P-TO-220-5-43
P-TO 220-5-122
(TO-220 AB/5, Option E3122)
P-TO252-5-1
Features
5 V, 8.5 V, 10 V or variable output voltage
Output voltage tolerance
4%
400 mA current capability
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
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 V
Q67000-A9265
P-TO220-5-3
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 SV
Q67000-A9273
P-TO220-5-43
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 GV
Q67006-A9272
P-TO220-5-122
TLE 4276 D V50
Q67006-A9369
P-TO252-5-1
TLE 4276 DV
Q67006-A9361
P-TO252-5-1
TLE 4276
Data Sheet Version 2.2
2
2000-10-11
Functional Description
The TLE 4276 is a low-drop voltage regulator in a TO package. The IC regulates an input
voltage up to 40 V to
V
Q,nom
= 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 includes temperature protection which turns off the device at overtemperature.
Dimensioning Information on External Components
The input capacitor
C
I
is necessary for compensation of 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
Data Sheet Version 2.2
3
2000-10-11
Figure 1
Pin Configuration (top view)
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 version connect an
external voltage divider to determine the output voltage.
5
Q
Output; block to ground with a capacitor of
C
22
F, ESR
3
=
at 10 kHz.
Q
GND
N.C.
INH
1
5
AEP02041
(VA)
GND
INH
(VA)
AEP02042
N.C.
Q
1
5
P-TO220-5-43
P-TO220-5-122
P-TO220-5-3
P-TO252-5-1
AEP02560
1
5
INH
N.C.
Q
(VA)
GND
1
5
GND
INH
AEP02043
N.C.
(VA)
Q
TLE 4276
Data Sheet Version 2.2
5
2000-10-11
Note: Maximum ratings are absolute ratings; exceeding any one of these values may
cause irreversible damage to the integrated circuit.
Absolute Maximum Ratings
Parameter
Symbol
Limit Values
Unit Test Condition
min.
max.
Voltage Regulator
Input I
Voltage
V
I
42
45
V
Current
I
I
Internally limited
Inhibit INH
Voltage
V
INH
42
45
V
Voltage Adjust Input VA
Voltage
V
VA
0.3
10
V
Output Q
Voltage
V
Q
1.0
40
V
Current
I
Q
Internally limited
Ground GND
Current
I
GND
100
mA
Temperature
Junction temperature
T
j
40
150
C
Storage temperature
T
stg
50
150
C
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