L78S18CV

Current - Output:	2A
Base Part Number:	L78S18
Supplier Device Package:	TO-220AB
Package / Case:	TO-220-3
Mounting Type:	Through Hole
Operating Temperature:	0°C ~ 150°C
Protection Features:	Over Current, Over Temperature, Short Circuit
Control Features:	--
PSRR:	43dB (120Hz)
Current - Quiescent (Iq):	8mA
Series:	--
Voltage Dropout (Max):	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	18V
Voltage - Input (Max):	35V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tube

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L78S18CV Application Field and Working Principle

The L78S18CV voltage regulator is a member of Texas Instrument\'s L78 family of low dropout (LDO) adjustable regulators, featuring a two-terminal adjustable series device which can provide up to 18V of regulated voltage. It is best suited for applications that require low noise, low power dissipation, high stability, and high efficiency. The device is also capable of delivering current up to 1.5A.The main application fields of the L78S18CV voltage regulator are power supply design, automotive electronics, communication equipment, and medical applications. The regulator is capable of operating in extreme temperatures ranging from -40℃ to 125℃, making it suitable for a wide range of applications.The L78S18CV voltage regulator works on the principle of linear regulation. It maintains the output voltage constant by tracking the variations in the input voltage and dissipating the excess power as heat. This process ensures that the voltage output remains constant even when the input voltage varies. Internally, the device has two major components: the pass transistor and the error amplifier. When a voltage difference is observed between the output and reference, the error amplifier compares the two and activates the pass transistor. This in turn passes the current, enabling the regulator to keep the output voltage constant.The L78S18CV voltage regulator also has a built-in thermal protection feature which helps protect the device from any thermal overloads. Whenever the temperature of the regulator starts to rise, the protection feature will automatically reduce the load current, protecting the regulator and its surrounding components. The L78S18CV voltage regulator also offers excellent ripple rejection and noise suppression in order to ensure error-free and steady performance. The device also operates on wide voltage ranges ranging from 11V to 40V, making it suitable for a variety of input configurations.The L78S18CV voltage regulator can easily be integrated into circuit designs, as it does not occupy a large physical space and requires minimal external components for its operation. The device also features relatively low quiescent current, typically around 20 µA . Additionally, the device has low output voltage noise and very low output voltage temperature coefficient, typically around 20 ppm/°C.The L78S18CV voltage regulator is an essential component for providing high-quality power to a variety of applications. Thanks to its low power dissipation and noise rejection, it is an ideal choice for variable voltage applications that require low noise and stable current delivery. With its various features, it is well designed to meet the demands of power supplies and help them operate as efficiently as possible.

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