NX2114ACSTR

Voltage - Supply (Vcc/Vdd):	4.5 V ~ 5.5 V
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Operating Temperature:	0°C ~ 70°C
Control Features:	Enable, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	94%
Frequency - Switching:	600kHz
Series:	--
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	PWM
Part Status:	Last Time Buy
Packaging:	Tape & Reel (TR)

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NX2114ACSTR Application Field and Working Principle

NX2114ACSTR is a DC-DC switching controller specially designed for use in Point-of-Load (POL) applications. This type of controller is usually used in applications such as communications systems, base-stations, and consumer electronics. Featuring a wide input voltage range from 9V to 24V, it can be used to regulate an output voltage of 1.5V or lower.

Overview

NX2114ACSTR is a monolithic integrated controller with an embedded PMOS and NMOS power switch. It is optimized for achieving fast control loop settlements with minimal external components and allows for quick and accurate point-of-load power delivery. This controller is specifically intended for applications requiring high current and low output voltage, such as POL converters.

Features and Applications

The NX2114ACSTR offers a wide range of features that enable it to operate in a broad range of applications. It is designed to be used in high-current switching applications and provides excellent efficiency, low noise, and fast loop settling time (2 us). The controller employs a 1A peak-current PMOS switch and a 0.8A peak-current NMOS switch, allowing it to operate in a wide range of applications.In addition, the NX2114ACSTR is designed to work with a small number of external components, allowing for a compact and cost-effective solution. It is also equipped with Pulse-Width-Modulation (PWM) control, enabling it to support various frequency profiles including low-load, light-load and linear modes. In order to further increase system efficiency, the controller is also able to support Spread Spectrum Frequency Modulation (SSFM). Some of the applications supported by this controller include notebook and tablet PCs, gaming consoles, HD and SD digital entertainment systems, and high-end industrial automation systems.

Working Principle

The NX2114ACSTR operates based on the voltage-mode control principle, modulating the MOSFET switches\' ON/OFF times to regulate output voltage. This type of switching is beneficial because it minimizes losses in the power MOSFET switches, resulting in higher overall efficiency.The NX2114ACSTR controller is designed to enable fast, accurate, and precise voltage regulation. It utilizes voltage feedback and utilizes a wide range of PWM control schemes, allowing it to operate effectively in different load profiles.The controller uses an adaptive adaptive-averaging current limit control, enabling precise current limit operation. This control helps minimize voltage-swings, during transient load conditions, thus improving system efficiency. The controller also supports transient load-line compensation (TLLC) for maintaining a constant output voltage under a fast transient load.

Conclusion

NX2114ACSTR is an efficient, feature-rich DC-DC switching controller specifically designed for use in Point-of-Load applications. It utilizes an adaptive-averaging current limit control, offering precise current limit operation. Additionally, it supports various frequency profiles, such as low-load, light-load and linear modes, and spread spectrum frequency modulation for further improving efficiency. This controller is ideal for applications requiring high current and low output voltage.

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