LMR14020SDDA

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The LMR14020SDDA is an integrated DC-DC switching regulator controller designed primarily for non-isolated, intermediate bus converter applications. It offers a variety of adjustable operating parameters and is fully protected for operation in harsh environments.The LMR14020SDDA provides high efficiency and low noise operation through the use of interleaved current mode control. This combined with its low input current requirements make it suitable for a wide range of applications from intermediate bus converters to auxiliary supplies.

This device is primarily intended for non-isolated, intermediate bus converter applications. These applications include motor drives, consumer electronics, and networking applications. The device is a synchronous buck regulator that provides a regulated intermediate rail voltage from a wide input voltage range. It allows for a single stage conversion from a higher (up to 33V) to a lower voltage.

The LMR14020SDDA features a non-isolated, synchronous buck configuration, with regulated current mode control (RCMC). It has a wide adjustable operating range of 0 to 1.0 V running up to 1.2 MHz switching frequency, electrically adjustable soft-start, and two over-current protection levels. The LMR14020SDDA also features high-speed current foldback, cycle-by-cycle peak current and average current limiting, enabling the device to operate in high-efficiency, low-loss conditions over the specified operating temperature range and continuous body diode current.

The LMR14020SDDA’s high-efficiency is achieved by interleaving multiple controllers operating in parallel, and reducing input voltage ripple. The device’s integrated synchronous MOSFETs and Schottky diodes reduce switching losses and improve efficiency. The two power stages are individually controllable, allowing the user to adjust the proportion of the active and standby stages to suit the application. The device also features a power-save mode and burst mode to reduce current consumption at light load.

The LMR14020SDDA is available in both a surface-mount and lead-free package, and is rated for operation over a temperature range of -40°C to 100°C. It is also available in RoHS compliant versions for compliant systems.

The LMR14020SDDA provides an ideal solution for intermediate bus converter and other auxiliary power supply applications requiring high efficiency, low noise operation and high power density. The device is highly-integrated and includes many protection features such as over-voltage, over-temperature, under-voltage lockout, and over-current protection. It also features a programmable over-temperature protection and power-saving auto-resume. All these features, combined with its high-efficiency and low-loss operation, make it suitable for a wide range of applications.

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