CS8151D2G

PMIC - Voltage Regulators - Linear: CS8151D2G application field and working principle

The CS8151D2G is a linear voltage regulator that can be used to provide a reliable source of power in a variety of electronic systems. It provides stable output voltages ranging from 2.5V to 11.5V, with a built-in logic power supply that is capable of supplying up to 300mA of current. It is a feature rich device which includes current and thermal protection, ESD protection, power sequencing and overvoltage protection. Because the CS8151D2G is an adjustable voltage regulator, the output voltage can be easily set by adjusting a single external resistor.

The CS8151D2G is well-suited for a wide range of applications, including powering LED backlights, LCD panels, logic supply for microcontrollers, FPGA, ASICs, and other low-power embedded systems. It is also ideal for battery-powered applications, as the device features integrated power-down and power-saving modes. This makes it an exceptional choice for providing power supply for applications in battery-powered portable devices.

The CS8151D2G’s high efficiency and low dropout operation make it ideal for a variety of power-sensitive applications. It is also compatible with a wide range of standard low-noise capacitors, including tantalum and ceramic, which makes it suitable for powering sensitive analog circuits on board an electronic system. Additionally, it incorporates built-in ESD and surge protection, which provide additional protection in the event of an overvoltage or surge. Furthermore, the device can be easily and effectively reset without an external circuit.

Working Principle

The linear voltage regulator supplied by the CS8151D2G is based on a control circuit and an operational amplifier. The operational amplifier uses feedback from the output voltage and compares it with a reference voltage to control the output voltage. The reference voltage of the CS8151D2G is internally set at 1.20V and can be adjusted down to 0.95V by connecting a capacitor between the R2 pin and ground.

The linear voltage regulator can be used to regulate a voltage either above or below the reference voltage. The CS8151D2G is designed to regulate the output voltage in a 1V to 11.5V range, and it is important to ensure that the output voltage does not exceed the maximum rated output voltage of 11.5V. If the output voltage of the CS8151D2G exceeds 11.5V, the device will shut down and enter into a power-saving standby mode.

The CS8151D2G operates in a constant-voltage mode and the output voltage is adjusted by varying the input voltage. This operation allows the device to deliver up to 300 mA of current, with a voltage drop less than 2V at full load. The device incorporates overvoltage protection and undervoltage lockout, as well as current limit and thermal protection. In addition, an EN pin can be used to enable or disable the voltage regulator.

Conclusion

The CS8151D2G is a featured-packed linear voltage regulator that offers a wide range of features and benefits for a variety of power-sensitive applications. Its adjustable output voltage, high efficiency, and low dropout operation make it an ideal choice for powering a variety of electronic systems. Additionally, its built-in features provide an extra level of protection and reliability, while its integrated power-down and power-saving capabilities make it an exceptional choice for battery-powered applications.