LMR10520XSDE/NOPB

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The LMR10520XSDE/NOPB is a buck (step down) voltage regulator featuring integrated FETs, allowing it to employ a small solution size soldering onto a Printed Circuit Board (PCB). This device is part of the LMR family of DC/DC switching regulators and is classified under the category of PMIC (Power Management Integrated Circuits), Voltage Regulators, and DC/DC Switching Regulators.

In DC/DC switching regulators, the LMR10520XSDE/NOPB is the smallest of the LMR family, offering the benefits of a high efficiency (greater than 85%) and complete system protection, including current limit, under-voltage lock-out (UVLO) and overtemperature control. These features facilitate the design of cost-effective and reliable power solutions. In order to explain the operation principle of the device, the circuit can be divided into two main blocks: Power Stage and one Control Topology.

The power stage block is composed by the output inductor, two MOSFETs (Metal Oxide Semiconductor Field Effect Transistor), two high-speed diodes and the output capacitor. This part of the circuit is responsible for the actual voltage conversion from the high input voltage to the output voltage.

The control topology block is composed of the LMR10520XSDE/NOPB integrated circuit and its associated external components. This block is responsible for controlling the power MOSFETs in order to regulate the output voltage. The device includes an internal voltage reference and oscillator, current-limit monitoring and protection circuits, and both an enable and a soft start pin.

The LMR10520XSDE/NOPB is primarily used in applications requiring a high input voltage reduction to 5V, with a nominal output current of 1.25A. Typical uses include low dropout (LDO) regulators, audio amplifiers, USB ports, and other line powering needs. The device is also used for applications where a space-saving approach is necessary, such as cellular phones and/or personal digital assistants (PDA).

In summary, the LMR10520XSDE/NOPB is a DC/DC buck converter part of the LMR family of DC/DC switching regulators. It has an integrated FET in a very small size and offers a high efficiency, current limited protection and other system protections. The device is mainly used in applications requiring a high input voltage reduction to 5V, and also in applications where a space-saving approach is necessary.

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