NCV2574DW-ADJR2

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The NCV2574DW-ADJR2 is a synchronous step-down switching converter with integrated power MOSFETs, and is part of a series of DC/DC switching regulator modules. This DC/DC switching regulator module offers a wide input voltage range, high efficiency, low quiescent current, low noise, and programming of output voltage (adjacent resistor mode only). It is especially well-suited for applications that need the highest power conversion efficiency and the greatest flexibility in terms of size, power handling, and load variation.

The NCV2574DW-ADJR2 offers 50 kHz to 700 kHz of fixed frequency operation and up to 2 A of continuous output current. It comes in a 5 mm x 6 mm x 0.5 mm TQFN-32 package and operates from a 4.5 V to 24 V input voltage range. With an integrated MOSFET, it has a high efficiency of up to 96% and can operate at temperatures from -40°C to +85°C. The synchronous step-down switching regulator has output voltage programming that allows the user to adjust the output voltage using an adjacent resistor.

The switch mode power supply (SMPS) of the NCV2574DW-ADJR2 utilizes a constant frequency, current mode architecture with cycle-by-cycle current limit. The switching frequency is fixed at the factory and is selectable between 50 kHz, 250 kHz and 700 kHz. The output voltage is adjustable with an external resistor interface. The switching regulator provides both internal compensation and on-board damping resistors that minimize the number of external components required.

The NCV2574DW-ADJR2 is an ideal choice for applications such as power management, portable and distributed power systems, consumer electronics, industrial and automotive electronics, and other power sensitive applications. It is perfect for powering systems with sources ranging from 4.5 V to 24 V such as battery operated systems, wall-adapters, and USB ports. It also offer low quiescent current, low noise, high efficiency, and excellent output accuracy for small loads.

The working principle of the NCV2574DW-ADJR2 is to provide a steady voltage output by using a low-noise, pulse-width modulation (PWM) control scheme. The internal power MOSFETs switch on and off at a fixed frequency of 50 kHz, 250 kHz or 700 kHz, depending on the output voltage selection. For example, at a 50 kHz switching frequency, the PWM duty cycle increases with increased output voltage demand; when the output voltage is low, the duty cycle decreases. As the output voltage setpoint is exceeded, the duty cycle decreases and the output voltage begins to drop until a new equilibrium is established.

In summary, the NCV2574DW-ADJR2 is a high-efficiency, synchronous step-down switching regulator ideal for many applications in power management, portable and distributed power systems, consumer electronics, industrial and automotive electronics. It offers excellent output accuracy, low quiescent current, output voltage programming and up to 96% efficiency. With its integrated MOSFETs and adjustable frequency, it is a versatile and cost-effective power solution for a wide range of applications.

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