LM2587SX-ADJ/NOPB

The LM2587SX-ADJ/NOPB is a monolithic power-conversion device, which is typically used as a DC-DC switching regulator. It is capable of providing a wide range of output voltages, adjustable or fixed, with internal power switch and a built in current limiter. This device works as a variable frequency step-down DC/DC converter, providing high efficiency and low output voltage ripple.

The application field of the LM2587SX-ADJ/NOPB includes on-card, point-of-load, and distributed power subsystems. This regulator device is suited for use in handheld portable applications including LCD displays, portable communications equipment, digital cameras, solid state storage, and notebook computer power supplies.

This regulator device is an open loop, current mode step-down switching regulator, based on a fixed frequency oscillator and integrated high-side power switch current-limit circuitry. The LM2587SX-ADJ/NOPB integrates the high-side power switch, the valley switch controller (VSC), the peak-current mode control, the compensation circuitry, and the error amplifier into a single package.

The input voltage range for the LM2587SX-ADJ/NOPB is 3V – 36V, and it is capable of regulating an output voltage as low as 0V with a wide range of external components. The operating frequency of the device is around 300 kHz, but can be adjusted to a wider range depending on the chosen system’s load requirements.

The LM2587SX-ADJ/NOPB features a wide system compatibility. Its ability to sense the load current and its ability to respond to load changes make it suitable for applications such as Distributed Power Systems and Digital Point-of-Load (DPOL) applications. In addition, the LM2587SX-ADJ/NOPB offers excellent EMI performance.

The LM2587SX-ADJ/NOPB operating principle is based on the principle of PWM control. When the voltage at the input pin exceeds the voltage of the reference pin, the PWM controller turns on the integrated power switch and the output is regulated to the desired output voltage level. At the same time, the VSC continuously monitors the input voltage to keep the output voltage at the desired level. When the voltage at the input pin falls below the voltage of the reference pin, the power switch is turned off and the output voltage is regulated.

In summary, the LM2587SX-ADJ/NOPB is an advanced switching regulator and controller device, primarily designed for on-card, point-of-load, and distributed power subsystems. This device offers high efficiency and low output voltage ripple, wide system compatibility, and excellent EMI performance, making it suitable for use in a variety of applications.