NCP707CMX310TCG

NCP707CMX310TCG Application Field and Working Principle

The NCP707CMX310TCG is a low dropout (LDO) voltage regulator specifically designed for use in portable electronic and communication products. It is a single output voltage linear regulator that offers a wide range of adjustable output voltages from 150mV to 12v, with low operating current and higher power supply rejection of up to 85db. The device offers excellent system performance with fast transient response and low voltage noise, and also features overcurrent and overtemperature protection to improve system reliability.

Features of NCP707CMX310TCG

• Output Voltage range: 150mV to 12V
• Operating Current: 0.17mA (typ)
• Power Supply Rejection: 85dB
• Transient response: 0.1uS (typ)
• Voltage noise: 0.9uV (typ)
• Overcurrent and Overtemperature Protection

Application Field of NCP707CMX310TCG

The NCP707CMX310TCG is an ideal choice for a wide range of applications from portable electronics to communications. It is particularly suitable for battery-powered handheld products such as cellular phones, smart phones, PDAs and other portable devices where low dropout voltage is important for battery life and input voltage variation is high. In addition, this device is useful for application such as power management systems where low output ripple noise is desired.

Working Principle of NCP707CMX310TCG

The NCP707CMX310TCG uses an advanced control circuit topology and process technology to provide excellent transient characteristics and low dropout performance. The device internally ties the error amplifier and the power transistor together and utilizes an advanced feedback loop to maintain the output voltage with low noise. The circuit is designed in a way that the power transistor is constantly active to ensure that the load current is always constant and the voltage regulator operates in the dropout region almost independently of the input voltage.

The power transistor uses two PMOS transistors operating in parallel and controlled by a resistor divider to reduce the effect of power transistor saturation on the output voltage. The error amplifier compares the output voltage with the reference voltage and controls the gate voltage of the power transistors which further provides for accurate output regulation at the load.

The NCP707CMX310TCG also features overcurrent and overtemperature protection which helps protect the device from overheating and thermal runaway. The overcurrent protection monitors both the output current and the input voltage and shuts down the device in case of an overcurrent condition to ensure that the load is protected from overloading. The overtemperature protection limit the device’s maximum temperature and prevents the device from operating in an unsafe temperature.