NCP3335AMN500R2G Application Field and Working Principle

PMIC - Voltage Regulators - Linear

The NCP3335AMN500R2G is a low dropout (LDO) positive Voltage Regulator from ON Semiconductor. It is part of the NCV3335 family, which has been designed to regulate either a single voltage or multiple voltage rails depending on the number of outputs. With a wide input range (1.8V - 6V) and a typical dropout voltage of 300mV at 500mA output current, it is suitable for a wide range of applications including multi-rail power supplies found in the telecom, datacom and the industrial markets.

As a Linear Voltage Regulator, this device regulates the output voltage by internally tracking the input voltage, assuming the load current is constant. This can be done with either one or two independent control loops, depending on the number of outputs provided. This is in contrast with switching regulators, which regulate the output voltage by varying the frequency or duty cycle of the internal switching transistor.

The output voltage of the NCP3335AMN500R2G is set with four external resistors. This allows for a wide range of output voltage configurations. The output voltage is set with a resistor network consisting of a resistor connected between GND and the VREF pin, another resistor connected between VREF and the VOUT pin, and two external resistors connected in series between the VOUT pin and the ADJ pin. The output voltage can be adjusted by changing the external resistor values.

The NCP3335AMN500R2G features protection circuitry to protect the regulated output voltage from over-current and over-temperature conditions. It has an external load disconnect feature, which eliminates the need for external current sensing resistors, thereby reducing components and saving precious space on the PCB. This feature also allows for faster load disconnection, providing better system protection from over-current conditions.

The NCP3335AMN500R2G is an excellent choice for a wide range of applications requiring low dropout voltage, multiple voltage rails, and high current capability. The device can be used for a variety of applications such as Low Power CPUs, Notebooks, Digital TVs, Cellular Phones, and Set-Top Boxes.

In summary, the NCP3335AMN500R2G is an excellent choice for low dropout (LDO) positive Voltage Regulator applications requiring multiple voltage rails and high current capability. Its wide input voltage range and low dropout voltage, along with the protection features, make it well-suited for a wide range of applications.