NX2837CUPTR

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NX2837CUPTR Application Field and Working Principle

NX2837CUPTR is a linear and switching PMIC - Voltage Regulator, suitable for many applications. It is an integrated Power Management IC combining all the functions of a linear regulator and a switching regulator included in a single 8-pin package.

Application Area

It is suitable for a wide range of applications, such as portable computer, mobile phone, cable TV / set-top box games, digital cameras and digital PDA (Personal Digital Assistants).

It provides a complete solution for all kinds of voltage regulation requirements. It can be used as the main regulator in a computer or a mobile phone, where it can provide a stable low noise and low ripple power supply. It also has the advantage of low cost, high efficiency, and low standby power consumption.

It is also suitable for a wide range of automotive applications, such as stability control, headlamp control, driving light control, safety warning lamp control, car parking light control, and GPS system regulator.

It is also used for a wide range of industrial uses, such as in robots, meters, security systems, and home appliances and in other industrial instrumentation.

Features

The NX2837CUPTR features the following:

• Two programmable output voltages
• Low input voltage operation
• High efficiency and low noise operation
• Low standby power and quiescent current
• Wide operating temperature range
• Flexible output voltage monitoring options
• Excellent regulation accuracy
• High PSRR at low frequencies

Working Principle

The NX2837CUPTR is an integrated, linear and switching regulator with integrated all the functions of a linear regulator and a switching regulator. It works in a closed loop system and contains an internal voltage reference, sensing element and a programmable feedback current source.

The linear regulator works in such a way that it provides a constant and stable output voltage, even if the input voltage is varied. The internal feedback current source senses the input voltage and compares it with the reference voltage. If the input voltage is higher than the reference voltage, it will start to increase the output voltage. Conversely, if the input voltage is lower than the reference voltage, then the output voltage will be decreased.

On the other hand, the switching regulator works according to its duty cycle, i.e., it switches between the input voltage and a given frequency, and with the change in the duty cycle, it can change the output voltage. This type of regulator employs a pulse width modulation (PWM) to control the output voltage. It uses an on-chip oscillator to create different duty cycles, which result in changing the output voltage. The output voltage can be varied by varying the duty cycle, frequency or both.

The switching regulator also includes an Integrated mosfet driver, temperature compensation and protection circuits. It is also facilitated with the Over Voltage Protection (OVP), Thermal Shut Down (TSD), Output Over Load Protection (OOP) and Input Under Voltage Lock Out (UVLO) features.

NX2837CUPTR provides excellent performance in both types of regulators. It is designed to provide accurate and stable output voltage both in line and switch mode operation. It also has excellent transient response and low noise operation. It has a maximum output current of 700 mA and up to 1.2A when the duty cycle is reduced to 30%.

Conclusion

NX2837CUPTR is a linear and switching PMIC - Voltage Regulator, suitable for many applications. It is an excellent solution for all kinds of voltage regulation requirements. It is designed to provide accurate and stable output voltage in both linear and switch mode operations. It also has very low power consumption and low ripple noise. It is suitable for a wide range of applications and is an ideal solution for portable computers, mobile phone, cable TV / set-top box games and many other applications.

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