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TLE4274

Siemens Semiconductor Group
Part Number TLE4274
Manufacturer Siemens Semiconductor Group
Description Low-Drop Voltage Regulator
Published Apr 16, 2005
Detailed Description Low-Drop Voltage Regulator TLE 4274 Features • • • • • • Output voltage tolerance ≤ ± 4 % Low-drop voltage Very low cu...
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TLE4274
TLE4274

Overview
Low-Drop Voltage Regulator TLE 4274 Features • • • • • • Output voltage tolerance ≤ ± 4 % Low-drop voltage Very low current consumption Short-circuit proof Reverse polarity proof Suitable for use in automotive electronics P-TO220-3-1 Type TLE 4274 V10 TLE 4274 V85 TLE 4274 V50 TLE 4274 D V50 Ordering Code Q67000-A9258 Q67000-A9257 Q67000-A9256 Q67006-A9331 Package P-TO220-3-1 P-TO220-3-1 P-TO220-3-1 P-TO252-3-1 P-TO263-3-1 P-TO263-3-1 P-TO263-3-1 P-TO252-3-1 TLE 4274 G V10 Q67006-A9261 TLE 4274 G V50 Q67006-A9259 TLE 4274 G V85 Q67006-A9260 SMD = Surface Mounted Device Functional Description The TLE 4274 is a low-drop voltage regulator in a TO220 package.
The IC regulates an input voltage up to 40 V to VQrated = 5.
0 V (V50), 8.
5 V (V85) and 10 V (V10).
The maximum output current is 400 mA.
The IC is short-circuit proof and incorporates temperature protection that disables the IC at over temperature.
Dimensioning Information on External Components P-TO263-3-1 The input capacitor CI is necessary for compensating line influences.
Using a resistor of approx.
1 Ω in series with CI, the oscillating of input inductivity and input capacitance can be damped.
The output capacitor CQ is necessary for the stability of the regulation circuit.
Stability is guaranteed at values CQ ≥ 22 µF and an ESR of ≤ 3 Ω within the operating temperature range.
Semiconductor Group 1 1998-11-01 TLE 4274 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 Pin Configuration (top view) P-TO220-3-1 P-TO252-3-1 P-TO263-3-1 GND Ι Q AEP02512 Ι GND Q AEP02281 Ι GND Q AEP01957 Figure 1 Pin Definitions and Functions Pin No.
1 2 3 Symbol...


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