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Low-Drop Voltage Regulator TLE 4276
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
Type Ordering Code Package
P-TO220-5-3
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
TLE 4276 D V50 Q67006-A9358 P-TO252-5-1
▼
TLE 4276 DV Q6 7006-A9361 P-TO252-5-1
▼
P-TO220-5-43
P-TO220-5-122
SMD = Surface Mounted Device
▼ New type
P-TO252-5-1 (D-PAK)
Semiconductor Group 1 1998-11-01
TLE 4276
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
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 µA. The IC is shortcircuit-proof and incorpora tes temperature protection that disables it at over-temperature.
Dimensioning Information on External Components
C
The input capacitor
approx. 1 Ω in series with
is necessary for compensating line influences. Using a resistor of
I
C
, the oscillating of input inductivity and input capacitance can
I
be damped. The output capacitor
Stability is guaranteed at val ues
temperature range.
= 5.0 V (V50), 8.5 V (V85 ), 10 V (V10) and adjustable
Qrated
C
is necessary for the stability of the regulation circuit.
Q
C
≥ 22 µF and an ESR of ≤ 3 Ω within the operating
Q
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
Semiconductor Group 2 1998-11-01
Pin Configuration
Q
Ι
GND
N.C.
INH
1
5
AEP02041
(VA)
(top view)
P-TO220-5-3 P-TO220-5-43 P-TO252-5-1P-TO220-5-122
TLE 4276
GND
Figure 1
1
1
Ι
GND
INH
5
Q
N.C.
(VA)
AEP02042
Ι
GND
INH
5
Q
N.C.
AEP02043
15
Q
INHΙN.C.
(VA)
AEP02560
Pin Definitions and Functions
Pin No. Symbol Function
1 I Input; block to ground directly at the IC with a ceramic capacitor.
2INHInhibit; low-active input
3GNDGround
4N.C.
VA
Not connected for V50, V85, V10
Voltage Adjust Input; only for adjustable output from external
voltage divider.
5QOutput; block to ground with a ≥ 22 µF capacitor.
Semiconductor Group 3 1998-11-01
TLE 4276
Temperature
Sensor
1
Ι
Control
Amplifier
Bandgap
Reference
INH
*)
For fixed Voltage Regulator only
**)
For adjustable Voltage Regulator only
Saturation
Control and
Protection
Circuit
6
Q
Buffer
*)
**)
2
4
VA
3
GND
AEB02044
Figure 2
Block Diagram
Semiconductor Group 4 1998-11-01
TLE 4276
Absolute Maximum Ratings
T
= – 40 to 150 °C
j
Parameter Symbol Limit Values Unit Test Condition
min. max.
Voltage Regulator
Input
Voltage
Current
Inhibit
Voltage
Voltage Adjust Input
Voltage
Output
Voltage
Current
Ground
V
I
V
V
V
I
I
Q
I
INH
VA
Q
–42 45
––
V
–
–
Internally limited
–42 45 V –
–0.3 10 V –
–1.0 40 V –
– – – Internally limited
Current
I
GND
–100mA–
Temperature
Junction temperature
Storage temperature
T
j
T
stg
–150°C–
–50 150 °C–
Note: Maximum ratings are abs olute ratings; exceeding any one of th ese values may
cause irreversible damage to the integrated circuit.
Semiconductor Group 5 1998-11-01