L78S15CV

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The L78S15CV device is a voltage regulator IC from the Linear PMIC (power management IC) product line. It is a three-terminal negative voltage regulator that can regulate voltages from -5V to -5.5V. It is designed for use in applications such as digital systems wherein a reliable and consistent negative voltage supply is needed. The L78S15CV voltage regulator is offered in both through-hole and surface-mount packages, and is capable of delivering up to 100mA of current.

The L78S15CV is a three-terminal negative voltage regulator which operates with an input voltage of -18V to -25V and an output voltage of -5V to -5.5V. It has a maximum output current of 100mA and an output voltage tolerance of 1%. This voltage regulator also has a thermal overload protection feature to protect the circuit from thermal runaway, for applications where the output load is highly variable or has very large currents. The L78S15CV is designed for use in low-power applications, such as for digital systems, where a reliable and consistent negative voltage is required. It is offered in the through-hole 8-pin PDIP and 8-pin SOIC packages, and the surface-mount MLF (Micro Lead Frame) package.

The working principle of the L78S15CV is based on the three-terminal voltage regulator topology. It consists of an NPN transistor, an N-channel MOSFET and a zener diode. The transistor and MOSFET serve as current regulators, while the zener diode serves as a voltage reference. The voltage reference voltage is set by the zener diode, which is typically around 5V. The input voltage is applied to the NPN transistor and the MOSFET, and the output voltage is controlled by the voltage reference. The current flowing through the NPN transistor and MOSFET is regulated by the MOSFET’s Gate-Source voltage. When the Gate-Source voltage exceeds a certain threshold, the MOSFET will begin to turn off, thus limiting the current. This regulation limits the output voltage to the voltage reference voltage.

The L78S15CV is a great choice for low-power applications that require a reliable and consistent negative voltage source. It is designed for use in applications such as digital systems or for driving voltage-controlled circuits, as its tolerance of 1% ensures that the output voltage is highly accurate. Its thermal-overload protection also makes it an ideal choice for applications where the output load is highly variable or has very large currents. It is offered in both through-hole and surface mount packages, and is capable of delivering up to 100mA of current. This makes it a great choice for applications such as power supplies, digital systems, and voltage-controlled circuits.

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