NCP1589CMNTWG

Frequency - Switching:	300kHz
Base Part Number:	NCP1589
Supplier Device Package:	10-DFN (3x3)
Package / Case:	10-VFDFN Exposed Pad
Operating Temperature:	-20°C ~ 70°C (TA)
Control Features:	Enable, Power Good
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	75%
Series:	--
Voltage - Supply (Vcc/Vdd):	4.5 V ~ 13.2 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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NCP1589CMNTWG DC-DC Switching Controller

The NCP1589CMNTWG is a DC-DC switching converter designed for adjustable non-synchronous and current-mode operation. It is the improved version of the popular NCP1588DCMNT, and features a wide range of voltage and current control. The NCP1589CMNTWG includes a unique patent-pending Active Loop Regulation (ALR) that reduces noise and system-level instability, improving system reliability and performance.

Applications

NCP1589CMNTWG is designed for applications including mobile/portable computing, digital media/camera, VoIP phones, WLAN, Bluetooth, and other handheld devices where high efficiency and switching frequency is required. It is also suitable for low noise, battery-powered applications that require low power consumption.

Features

The NCP1589CMNTWG offers the following features to ensure maximum efficiency and performance in various applications. -Noise bypassing: The ALR provides integrated noise bypass, reducing system-level noise to almost zero. -High efficiency: The high-efficiency synchronous support ensures up to 95% efficiency in all operating conditions. -Low power consumption: Internal power MOSFETs are combined with a low-voltage VCC regulator to minimize power consumption. -Wide range of working modes: Adjustable current-mode and non-synchronous fixed frequency working modes are available. -Variable frequency operation: The IREF pin allows external control of switching frequency.

Working Principle

The NCP1589CMNTWG DC-DC Switching Controller is designed to control DC/DC switching converters for voltage regulation. The NCP1589CMNTWG provides synchronous support for low output ripple and high efficiency, as well as non-synchronous fixed-frequency operation for wide range of switching frequencies.The controller is based on a voltage REG loop operating principle, where the image of the main inductor current is compared with a given reference to obtain a control signal. The control signal is translated into a PWM signal, which is used to drive an external MOSFET. The output voltage is maintained constant by a closed loop system. In current mode operation, the controller compares the image of the inductor current set point with the actual inductor current. The error is compensated using an integrator circuit, which then produces a PWM signal. In non-synchronous fixed frequency operation, the external PWM signals are used to provide the necessary timing information. The output voltage is adjusted by varying the external reference.

Conclusion

The NCP1589CMNTWG DC-DC switching controller is a high-efficiency device with advanced features for low noise, low-power consumption and wide range of voltage and current control. In addition to providing adjustable current-mode and non-synchronous fixed-frequency operation, it also provides integrated noise bypass that reduces system-level noise and improves performance. The NCP1589CMNTWG is ideal for mobile/portable computing and battery-powered applications that require high efficiency and reliability.

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