LMR10515YMFX/NOPB Integrated Circuits (ICs)

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The LMR10515YMFX/NOPB is a DC/DC fixed-frequency, micro-module switched-mode circuit converter with embedded high-performance controller and a synchronous buck regulator integrated FET used to provide a regulated output voltage. This converter is well-suited to various applications ranging from distributed power module (DPM) systems to point-of-load (POL) architectures.

Features

• Input voltage range of 4.5V to 14V
• 2.5A continuous load current
• 9V to 15V output voltage
• Frequency range of 200KHz~2MHz
• Integrated gate driver
• Integrated over-current/over-temperature protections
• Thermal protection
• Integrated low on-resistance synchronous FET

Application Field

The LMR10515YMFX/NOPB is commonly used in power regulation requiring an efficient switch mode power supply. Its low input voltage and high current capacity make it well suited to applications such as LED lighting, power supplies, and battery powered portable devices.

Working Principle

The LMR10515YMFX/NOPB is based on the Buck Topology principle of DC/DC switching regulators. This type of DC/DC switching regulator is designed to convert a higher voltage to a lower voltage, with the primary switch being used to control the amount of input power transferred to the output. The switching action produces a circuit with a high frequency current in both the input and output stages.

The switching action is triggered by an internal oscillator circuit which generates a high frequency alternating current (AC) signal. This signal is passed through a controller and then to the primary switches which then alternately close and open in rapid succession. This rapid opening and closing of the switches opens and closes the current loop connecting the input and output of the circuit, allowing current to flow in one direction, while preventing current from flowing in the opposite direction.

The LMR10515YMFX/NOPB is based on synchronous rectification technology, and incorporates a low-on resistance synchronous FET which, when the controller turns off the primary switch, allows very low energy losses associated with the rectification of the DC current. This low energy loss allows for higher efficiency, and also allows the output to remain stable even when the input source is gradually varying.

The output voltage of the LMR10515YMFX/NOPB can be adjusted by varying the frequency of the switching signal, which is determined by the amount of current drawn from the output. The voltage is regulated for stable output with minimal fluctuation, over a wide range of temperatures and input voltages.

Conclusion

The LMR10515YMFX/NOPB is an advanced, efficiently designed DC/DC switching regulator that is well-suited to a wide variety of applications, including distributed power module (DPM) systems and point-of-load (POL) architectures. This regulator is based on the buck topology principle and uses synchronous rectification technology with a low-on resistance synchronous FET. The optimized efficiency and response time allow for a highly stable, regulated output voltage with minimal fluctuation over a wide range of temperatures and input voltages.

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