LM2853MH-2.5/NOPB

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LM2853MH-2.5/NOPB is a monolithic, dc-to-dc switching regulator controller. This device, which belongs to the category of PMIC – Voltage Regulators – DC DC Switching Regulators, is designed to enable a wide range of applications. This application note provides an overview of the application field and working principle of the LM2853MH-2.5/NOPB.

The LM2853MH-2.5/NOPB is a dual supply, Bi-CMOS circuit that incorporates a high gain, low side current sense amplifier, a pulse width modulation (PWM) regulation loop, two active voltage magnitude detectors for output regulation, and a low quiescent current operation. It is capable of providing up to 4.7A of output current. Its input operating voltage range is 2.3V to 5.5V and its output voltage can be adjusted between 0.9V and 8V. Its switching frequency is adjustable from 10kHz to 400kHz.

The LM2853MH-2.5/NOPB is ideally suited for a variety of applications, such as battery-operated systems, Point of Load (POL) converters, and auxiliary power supplies. It is also suitable for high efficiency, small footprint, and low noise Power over Ethernet (PoE) applications. Other common applications include load switches, DC-DC converters, DC motor control, and step-down converters.

The working principle of the LM2853MH-2.5/NOPB utilizes pulse width modulation, which is a technique for controlling electric power using pulses of varying width. The controller consists of an error amplifier, a voltage regulator, a PWM comparator, and a low side current sense amplifier. The error amplifier modulates the PWM comparator, which acts as the oscillator and controls the pulse width of the switching pulses. The low side current sense amplifier senses the current through the load and regulates the output voltage of the device. The voltage regulator monitors the output voltage and ensures that its desired voltage is maintained regardless of the load or temperature.

In conclusion, the LM2853MH-2.5/NOPB can be used in a variety of applications due to its adjustable output voltage and switching frequency. It has a high switching frequency, enabling it to achieve high efficiency. Additionally, its low quiescent current and dual power supply makes it a suitable controller for battery-operated systems and PoE applications.

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