NCP81038MNTWG Application Field and Working Principle

NCP81038MNTWG is a low power 8-channel analog- and PWM-controlled Low-Dropout (LDO) and Buck converter Regulator. Designed for reliable operation over the wide extended temperature range, this device is ideal for applications such as the charging of super-capacitors, Backlight LED and battery supply for a wide range of applications, including smartphones and tablet PCs.

Application Field

NCP81038MNTWG is a great choice for space-saving, low total cost and low power consumption, designed with 8-channel Linear+Switching device. NCP81038MNTWG provides a wide range of features including Low-Dropout (LDO) buck converters and analog- and PWM- controlled low power regulators, specifically designed for efficient power management designs.

It can support up to 8 channels (3 buck, 2 LDO or 2 buck, 3 LDO), including linear and switching. It features high efficiency on each of the channels and a very small footprint. It also includes on-chip protection features such as over-current protection and over-temperature protection.

The very small footprint, combined with the high efficiency, make NCP81038MNTWG a great choice for design engineers working on a small form-factor and space-constrained applications, such as smartphones and tablet PCs.

Working Principle

NCP81038MNTWG operates by switching the current in an inductor, then lowering the voltage through a Low Drop-Out or LDO regulator. When the output current is steady, the inductor current will be limited by the output current and will draw current from the supply as an average of the input voltage and the output voltage. The inductor current will cause the output voltage to drop, resulting in an increase in the output current, and the cycle will continue.

The buck converter in this device also works in the same way, but by controlling the switching frequency and the duty cycle. By controlling the duty cycle - which is the ratio of the on-time of the switching device to the total switching period - the output voltage of the converter can be adjusted to be exactly what is needed for the application.

NCP81038MNTWG also features a precision analog regulator, operated either in a PFM (pulse-width modulation) or PWM (pulse-width modulation) mode. It is designed for systems where high accuracy is essential and where bandwidth is not demanded.

The PWM mode also offers improved efficiency, as the switching frequency can be adjusted to the system needs. All of these features make NCP81038MNTWG a great choice for reliable and efficient power management in space-saving, low total cost and low power consumption applications.