LM2679SX-ADJ

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The LM2679SX-ADJ is a synchronous switching step-down current mode hot swap regulator featuring an adjustable output voltage from 0.6V to 5V. It is designed for an input voltage range of 1.2V to 7V, making it ideal for a variety of applications, ranging from portable devices to computing systems. It features a wide range of features, including output, current sense, soft-start, and low noise operations. Additionally, the LM2679SX-ADJ integrates a wide array of protection features, including over-temperature protection, short-circuit protection, and over-current protection.

Application Field of LM2679SX-ADJ

The LM2679SX-ADJ is ideal for applications that require an adjustable output voltage, especially those with wide input voltage range. It is an excellent choice for portable device designs and computing systems, as well as for powering circuits such as PoE (Power over Ethernet) and industrial telecommunication systems. This device can be used to power a range of consumer and embedded systems, from smartphones and tablets to routers and server blades.

In addition, the LM2679SX-ADJ is designed to meet the low-power requirements of modern embedded systems, including device-side cores, memory, and I/O expansion boards. With its low-noise operations and wide range of protection features, the LM2679SX-ADJ is an excellent solution for designs that require stability, reliability, and low power.

Working Principle of LM2679SX-ADJ

The LM2679SX-ADJ is a synchronous buck regulator, working on the principle of switching a device between an active state and a standby state. This switching process is set up and controlled by the IC, which adjusts the output voltage via a voltage loop in response to the external feedback voltage. The regulator works by modulating the duty cycle of a high-side power switch, which is connected between the input voltage rail and the output voltage rail.

The power switch is opened and closed through a series of cycles. When the switch is closed, current flows from the input rail to the output rail, storing energy in the inductor. When the switch is opened, the energy stored in the inductor is released, furthering the energy transfer. The switching process is controlled to produce an output voltage lower than the input voltage, after being routed through the external feedback network.

The LM2679SX-ADJ includes an onboard current sense amplifier, which is incorporated in the feedback circuit to protect the device from over-currents. Additionally, the IC integrates a soft-start, which prevents inrush current and helps protect the system from under-voltage and over-voltage conditions. Finally, the IC is designed to maintain a low level of noise across the system.The specific data is subject to PDF, and the above content is for reference