LTM4661IY

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The LTM4661IY is a high-performance buck switching regulator, an analog integrated circuit from Linear Technologies that provides regulation and control for a variety of switching regulators in the power management system. It is designed for applications requiring low noise and high efficiency, such as web servers, storage systems, and mobile systems. The LTM4661IY is a minimum part count, wide input voltage range, synchronous PWM buck regulator with integrated current sensing and programmable output current limit.

This DC-DC buck regulator belongs to the Voltage Regulators > DC-DC Switching Regulators family of products. Built on Linear Technology\'s advanced switching regulator process technology, the LTM4661IY provides high-performance regulation and accurate current limiting with minimum external components. This device is designed for applications that require high-efficiency, high-accuracy regulation and limit protection.

The LTM4661IY is a low noise, high frequency DC-DC power converter. It operates in an open loop constant frequency current-mode architecture. The working principles of this device are based on the control of the output voltage by varying the duty cycle of the switch. The duty cycle is varied by comparing a reference voltage to the average output current. The reference voltage is then converted to a duty cycle using a high speed voltage to PWM converter. When the reference voltage is greater than the average output current, the duty cycle decreases, and the output voltage increases, and when the reference voltage is less than the average output current, the duty cycle increases and the output voltage decreases.

The LTM4661IY provides excellent line and load regulation while providing low output noise. Its high frequency architecture is capable of regulating high currents with small inductors and capacitors. The device also offers excellent line transient response and Current Mode cross regulation elimination to improve load transient response. The operating frequency of the device is user adjustable and ranges from 200 kHz to 2 MHz. The device also provides integrated current sensing, programmable soft-start, and programmable over-current protection.

The LTM4661IY is suitable for high efficiency, high power density applications such as high end web servers, storage systems and mobile systems. It is an industry leading solution for high current, high frequency switching regulators, with its high performance, low noise and high efficiency features. With its advanced features and wide input voltage range, this device is a great option for many applications that require high-efficiency, high-accuracy regulation and limit protection.

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