L78S75CV

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The L78S75CV is a three terminal adjustable fixed 5.0 Volt regulator designed to provide up to 1A of output current. It can also be used as a variable output voltage controller, that with an external resistor divider, can adjust the output voltage at any value between 1.2V to 5.0V. The device includes current and thermal limiting, making it a very simple, safe and economical answer to the design requirements of most battery and power management applications.

Applications of L78S75CV

The L78S75CV is a great choice for battery management applications as it offers excellent load regulation, output voltage and current stability. It also offers a low output noise as well as low dropout voltage. Common applications include distributed power systems, laptop/tablet/portable devices, DC-DC converters, telecommunications systems and automotive electronics.

Working Principle of the L78S75CV

The L78S75CV uses an internally fixed 5.0V (preselected) voltage reference and an internal error amplifier to adjust the output voltage accordingly. It also has an internal pass transistor to provide the steady output current. The regulation is done by sensing the feedback voltage of the output. This negative voltage is compared to the internally generated reference voltage, and if found to be too high, the internal pass transistor is allowed to turn off, reducing the load current until the output voltage falls according to the desired output.

Advantages of L78S75CV

The L78S75CV offers numerous advantages over other linear regulators. It offers superior regulation over temperature with a typical 2.5% variation over an operating range of -40°C to +125°C. It also has an accuracy of ±5%, which is better than the standard ±10% of other linear regulators. This difference is mainly due to the resistive divider used to set the exact output voltage of the L78S75CV. It has a low output noise and a low dropout voltage, making it suitable for battery powered applications. Its current and thermal limiting qualities make it a safe, reliable and economical option for a variety of applications.

Conclusion

The L78S75CV is a great choice for a variety of linear regulator applications due to its superior accuracy, low output noise and low dropout voltage. Its current and thermal protection offers improved safety and reliability. This new device from STMicroelectronics is the solution for any application requiring a 5.0V regulator with adjustable output voltagea and up to 1A of output current.

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