LM5117PMHE/NOPB

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The LM5117PMHE/NOPB is a DC/DC switching controller with integrated high side MOSFET for applications ranging from sub-micropower to moderate power, such as battery-powered products, portable medical equipment, automotive, industrial and general purpose systems. As a part of Texas Instruments Power Management solutions, it is ideally suited for establishing highly-efficient power supplies and providing a flexible solution to power management issues related to noise, efficiency and startup times.

A DC/DC switching controller is a device used to control the switching of a DC voltage source. It works by using an integrated circuit or other electronic device to raise or lower the voltage level across the source. This type of controller ensures that the DC source output remains within a desired range, by controlling the speed of the switching process. It not only provides high-accuracy timing, but also helps reduce switching losses, resulting in higher efficiency power supplies.

The LM5117PMHE/NOPB is a synchronous DC/DC switching controller designed for applications requiring low power, low cost, and high efficiency. It integrates an independent high-side MOSFET gate driver, an adjustable frequency oscillator, and a low-side comparator, providing flexibility and control over the switch control signals. The high-side MOSFET driver allows very low current and power consumption while providing a high-current, low-impedance output driver and robust protection against overloads or short-circuits.

In addition, the LM5117PMHE/NOPB provides a wide range of protection features including adjustable-overvoltage, current-limit, and thermal shutdown. It also supports a wide input voltage range of 2.7 V to 5.5 V and operates over a temperature range of -40 °C to +125 °C. The device further comes with integrated enable logic which supports both manual and enable signals.

At the heart of the LM5117PMHE/NOPB is its switching frequency set by the Frequency Set resistor (RESET). This resistor can be adjusted to boost or reduce the switching frequency manually. The switching frequency also affects the ripple, as a lower switching frequency will result in higher ripple. The device’s switching frequency is also adjustable by attaching an external clock signal to the CLKP and CLKN inputs, allowing higher accuracy control of the switching speed and ripple.

The output of the LM5117PMHE/NOPB is controlled by a voltage loop based on the comparison of the external reference voltage to the output voltage of the DC/DC converter. When the output voltage is above the reference voltage, the voltage loop is set to a “low” state and the low-side MOSFET is turned off. As the output voltage falls below the reference voltage, the voltage loop is set to a “high” state, turning the low-side MOSFET on and allowing current to flow through the inductor. This cycling of the low-side MOSFET is what is known as Pulse Width Modulation (PWM), which is used to regulate and maintain the output voltage as close to the reference voltage as possible.

The LM5117PMHE/NOPB is a highly efficient, integrated non-synchronous, high-side MOSFET switching controller that is ideal for applications requiring low power consumption and high accuracy. By combining integrated high side MOSFET gate driver, adjustable frequency oscillator and low-side comparator, the device is able to provide high efficiency, low noise and fast start-up times. Its integrated protection features, wide range input voltage, and adjustable switching frequency make the device an ideal solution for various applications such as portable medical equipment, battery-powered products, automotive, and industrial systems.

The specific data is subject to PDF, and the above content is for reference