LM3671MFX-1.8

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LM3671MFX-1.8 is a highly efficient, pulse width modulation (PWM) step-down voltage regulator from National Semiconductor. LM3671MFX-1.8 is a PMIC (Power Management Integrated Circuit) device used for DC/DC conversion with a voltage range of 1V to 18V. It provides adjustable voltage and current output and failsafe protection features. The device is typically used in solar powered applications, automotive, industrial applications and in embedded systems.

The working principle of LM3671MFX-1.8 is based on a standard buck converter topology. First, the output current and voltage is set by external resistors at the FB (feedback) pin. This allows the IC to regulate the output voltage level. The FB pin will then generate a proportional voltage when compared to the external reference voltage. When the FB pin voltage is lower than the reference voltage, the controller will increase the frequency at the other side of the converter to increase the output current and lower the output voltage.

The LM3671MFX-1.8 has an array of features that enable it to meet the desired power requirements for a variety of applications. The device has a flexible PWM frequency, adjustable switching frequencies, which can range from 100 kHz to 1 MHz. It also has an input voltage range of 2V to 18V and an adjustable output voltage range of 1V to 13V. The device has integrated protection features such as over temperature protection and over current protection, and it supports reverse input current limiting, thus making it suitable for a wide range of applications.

In addition, LM3671MFX-1.8 features a small form factor package, low power dissipation and a wide input voltage range making it a suitable choice for a variety of DC/DC conversion applications. It also features low standby current, low standby voltage drain and an adjustable duty cycle range of 0.25 to 99.5%. The LM3671MFX-1.8 also features a current-mode control allowing for improved transient response. The device also offers a programmable soft start function, enabling a smooth power up.

The LM3671MFX-1.8 is an efficient DC/DC converter and voltage regulator for a variety of applications. It can be used in automotive, industrial, solar powered and embedded systems based applications, and its wide input voltage range and adjustable duty cycle range make it suitable for a variety of power management applications. The device also offers integrated protection features and low power dissipation, making it an efficient and cost effective solution for DC/DC conversion.

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