LM2587T-12

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LM2587T-12 is a kind of adjustable DC-DC step-down switching regulator with a maximum output power of 12W, which is widely used in a variety of industrial digital products, such as Notebook computer adapters, Professional audio, LED lighting, charger power supply, etc. It is a special step-down switching regulator, which has the characteristics of wide input voltage range, high efficiency, wide output voltage range and short circuit protection.

The input voltage of LM2587T-12 can be as high as 36V and as low as 0.8V, and its maximum output current is 2A. The adjustable output voltage range is 0.8 to 35V, which is especially suitable for power supply of multi-chip systems of different voltages. In addition, with the help of external components, the switching regulator also has the characteristics of over-voltage protection and reverse polarity protection.

Working Principle

This regulator adopts Pulse Width Modulation (PWM) control technology, which can achieve high precision voltage output through the contactless pulse width adjustment of output switch and inductive filter. The internal control logic will obtain the reference voltage at every cycle, determine the voltage pulse width of the output switch, and forget the output voltage. After passing through the inductive filter, a regulated DC voltage will be obtained.

In this way, a constant-voltage circuit is formed, and the output voltage can be adjusted in a wide range. In addition, the LM2587T-12 has the function of short circuit protection. When the output is short-circuited to ground, the on-off time ratio of PWM will be adjusted at once. That is to say, the power of output switch is limited, and the output current is also limited.

Applications Field

According to the characteristics of LM2587T-12, this adjustable DC-DC step-down switching regulator is widely used in various types of electronic products, such as notebook computer adapters, professional audio equipment, LED lighting and various types of charger power supplies.

Considering that it can provide a high efficiency, low ripple output in a wide input range and a maximum output current of 2A, LM2587T-12 has a wide range of applications. Such as: DSC, DVS, Notebook computers, digital cameras, MP3 players, washing machines, electronic vehicles, industrial automation, medical devices and other power products.

In addition, the characteristics of wide adjustable output voltage range, short circuit protection and reverse polarity protection of LM2587T-12 make this switching regulator particularly suitable for multi-chip system applications.

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