LM3670MF-3.3/NOPB

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The LM3670MF-3.3/NOPB is a general-purpose, low power DC-DC switching regulator with a high output voltage accuracy and low dropout voltage, and is suitable for various applications such as computer and notebook power, charging system power, set-top box power, smart card power, and industrial automation. Its output current capability is up to 2A.

Synchronous rectified buck regulator is a kind of energy conversion device which is widely used in voltage conversion, voltage and current regulation, battery charging and supervising etc. It has the superior performance of low noise, fast dynamic response and high conversion efficiency. The synchronous rectified buck regulator is composed of rectifier, MOSFET, current sensing and regulator IC, etc. This LM3670MF-3.3/NOPB is such a device to provide efficient and stable DC power.

The main functions of the LM3670MF-3.3/NOPB are adjustment of the output voltage, constant-current charging, controlling the input self-startup, and limiting output current through external resistor. It has soft-start control to reduce inrush current, current over protection and thermal shutdown protection, and is applicable in a wide range of input voltage (from 5V to 24V). The LM3670MF-3.3/NOPB can deliver a high output current accurately by using a constant-on-time (COT) control scheme.

The working principle of the LM3660MF-3.3/NOPB is based on the Pulse Width Modulation (PWM) control. It consists of an input voltage constructed into a constant voltage source. As an internal switch, the Pulse Width Modulation (PWM) MOSFET is used to control the output voltage. The PWM signal generator is used to generate a fixed frequency PWM control signal. An internal error amplifier is configured so as to compare the output voltage and the reference voltage and obtain the error signal, then use the error signal to drive the PWM MOSFET to control the output voltage. The LM3670MF-3.3/NOPB is also equipped with an output current sensing circuit to limit the output current. The output current can be set by an external resistor.

The LM3670MF-3.3/NOPB is an ideal device for use in a variety of power conversion applications. With its higher voltage accuracy and low dropout voltage, it can provide stable, efficient and accurate DC power output, and can be implemented with ease. The LM3670MF-3.3/NOPB is a perfect choice for tightly regulated power supplies in applications including computer and notebook power, charging system power, set-top box power, and industrial automation.

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