KA350

Voltage Dropout (Max):	--
Base Part Number:	KA350
Supplier Device Package:	TO-220-3
Package / Case:	TO-220-3
Mounting Type:	Through Hole
Operating Temperature:	0°C ~ 125°C
Protection Features:	Over Temperature, Short Circuit
Control Features:	--
PSRR:	80dB ~ 65dB (120Hz)
Current - Output:	3A
Series:	--
Voltage - Output (Max):	33V
Voltage - Output (Min/Fixed):	1.2V
Voltage - Input (Max):	35V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Bulk

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<article><h2>KA350 Application Field and Working Principle</h2><p>The KA350 is a fixed output three–terminal voltage regulator IC by Fairchild Semiconductor with linear voltage control. It is widely used to provide highly accurate and stable voltage supply in power management and protection of various microelectronic devices. The KA350 series has fixed output of 3.3, 5 and 12V, which makes it ideal for all kinds of circuits with tight voltage accuracy, such as home appliances and machine automation systems (e.g., automotive industry). The device has built-in overcurrent protection, which is an extra feature that helps ensure the safe operation and avoid overloading of the device.</p> <h3>Working Principle</h3><p>The KA350 linear voltage regulator works by controlling the voltage drop across its input and output terminals. This process is achieved by using a pass transistor, which acts as a resistor with a variable resistance, allowing the current flow of the external power source to be controlled by adjusting the resistance of the transistor. The current flow is regulated by the internal controller, which is responsible for detecting and comparing the voltages of the input and output of the device. The output voltage is regulated by controlling the transistor resistance in order to maintain the voltage stability of the output.</p> <h3>Advantages</h3><p>The main advantages of the KA350 linear voltage regulator are:</p><ul><li>Built-in overcurrent protection</li><li>High accuracy of output voltage</li><li>Very low output voltage noise and ripple</li><li>Internal thermal shutdown</li><li>Stable over a wide range of operating conditions</li><li>Very low quiescent current</li></ul> <h3>Application</h3><p>The KA350 linear voltage regulator is suitable for applications that require highly accurate output voltage, such as home appliances, automotive industry, power management and protection of low power subsystems. It is also very useful for the hardware control system of closed-loop systems.</p> <h3>Conclusion</h3><p>The KA350 is a popular linear voltage regulator IC by Fairchild Semiconductor with fixed output of 3.3, 5 and 12V. It has built-in overcurrent protection and extremely low quiescent current, which make this device a very valuable component in various designs. This voltage regulator can provide very accurate and stable voltage in power management and protection of various low power subsystems and is also suitable for applications that require low output noise and ripple.</p></article>

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