LM2585S-12/NOPB

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The LM2585S-12/NOPB is a high frequency current mode switching regulator controller. It is specifically designed for DC-DC buck regulators that switch at a frequency of around 250 kHz, allowing for smaller application board size and fewer external components to achieve the necessary high efficiency. It is also capable of working at typical pulse width modulation frequencies significantly higher than most other switching regulators.

It is an ideal solution for low voltage networks, embedded systems and battery operated applications, offering outstanding performance in a wide variety of applications. It is an ideal regulator for embedded applications where a high switching frequency is preferred. With its wide input voltage range, it allows for efficient energy storage and usage.

Working Principle

The LM2585S-12/NOPB is a synchronous current-mode switching regulator. It uses a voltage feedback loop to regulate the output voltage. The circuit consists of a voltage reference, a current sense amplifier, a PWM comparator, a timer, an oscillator, and a slew rate control. The voltage reference provides two fixed voltage reference levels, one for the upper and one for the lower threshold of the current sense amplifier. The current sense amplifier measures the inductor current by comparing the actual current with the reference voltage provided by the voltage reference.

The PWM comparator compares the output of the current sense amplifier with the output of the timer and generates the switching pulse width to regulate the output voltage. The timer is driven by the oscillator and it determines the frequency of the switching pulse width. The surge rate control ensures the switching pulse width has a smooth transition from minimum to maximum and vice versa.

Application Field

The LM2585S-12/NOPB is widely used for generating low output voltages from a high input voltage with high efficiency. It is ideal for applications such as industrial automation, robotics, wireless communication systems, automotive, consumer electronics, and portable medical devices. It can also be used for providing a low output voltage from an intermediate voltage source.

Some of the applications that may use the LM2585S-12/NOPB are; battery powered equipment, DC-DC converters, motor drives, AC-DC rectification, LED lighting, motor drives, and solar panel voltage control.

The LM2585S-12/NOPB can provide a wide input voltage range, making it suitable for many applications. It has integrated protection such as overvoltage, over-temperature, and short-circuit protection that makes it reliable under a variety of conditions. Its wide input and output voltage range, high efficiency, low voltage operation, and small size should make it suitable for many applications.

The LM2585S-12/NOPB is an ideal solution for many applications requiring a high switching frequency and small size. Its wide input voltage range, integrated protection features, and robustness makes it suitable for a variety of applications.

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