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MC78XXCT Fiches technique(PDF) 1 Page - Vishay Siliconix |
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MC78XXCT Fiches technique(HTML) 1 Page - Vishay Siliconix |
1 / 9 page MC78xxCT Series Vishay Semiconductor Document Number 74813 www.vishay.com 29-Nov-01 1 New Product 3-Terminal Fixed Positive Voltage Regulators Description These voltage regulators are monolithic integrated circuits designed as fixed-voltage regulators for a wide variety of applications including local, on-card regulation. These regulators employ internal current limiting, thermal shut- down, and safe-area compensation. With adequate heatsinking the MC78xxCT can deliver output currents in excess of 1.5 ampere. Although designed primarily as a fixed voltage regulator, these devices can be used with external components to obtain adjustable voltages with currents. Features • Output current in excess of 1.0 ampere • No external components required • Internal thermal overload protection • Internal short-circuit current limiting • Output transistor safe-area compensation • Output voltage offered in 2% tolerance Mechanical Data Case: TO-220 Package Case outline is on the back page. GND Input 1 Output 3 2 Reference Voltage Starting Circuit Error Amplifier Current Generator SOA Protection Thermal Protection Series Pass Element Internal Block Diagram Output Input Cin 0.33 µF MC78xx Co 0.1 µF Standard Application Notes: A common ground is required between the input and the output voltages. The input voltage must remain typically 2.0V above the output voltage even during the low point on the input ripple voltage. xx = these two digits of the part number indicate output voltage. Cin is required if regulator is located an appreciable distance from power supply filter. Co is not needed for stability, however, it does improve transient response. 1 2 3 MC78xxCT TO-220AB Pin Definition 1. Input 2. Ground 3. Output (Heatsink/ tab connected to pin 2) |
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