LM3670MF-1.2/NOPB

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The LM3670MF-1.2/NOPB is a low cost, highly efficient synchronous buck switching regulator for low output current, low dropout and high input voltage applications. It is suitable for automotive, industrial, computing, telecommunications and consumer electronic applications. The LM3670MF-1.2/NOPB is a multi-functional, fixed frequency switching regulator that includes an adjustable frequency oscillator and soft-start. It provides adjustable output voltage with a temperature-compensated reference. Output current limiting and over-temperature shutdown are both featured for protection. The LM3670MF-1.2/NOPB also offers an outstanding power-on reset (POR) circuit with a typical start-up time of 0.6 ms.

The LM3670MF-1.2/NOPB is a synchronous dual-channel, step-down DC to DC switching regulator controllable with a fixed frequency or a programmable oscillator. It provides synchronous rectified and non-rectified output capabilities. The LM3670MF-1.2/NOPB is recommended for high efficiency conversion of 4.95V to 13.5V inputs to output voltages as low as 0.7V. It operates at frequencies up to 1.2MHz and is suitable for both continuous and discontinuous conduction modes. It is capable of switching up to 1A peak output current and up to 0.8A of continuous current.

The main features of the LM3670MF-1.2/NOPB application field include:

• Wide input voltage range of 4.95V to 13.5V
• High output voltage accuracy of ± 3% at room temperature
• Adjustable power-on reset and over-temperature reset
• Adjustable gate and output voltage
• Simple enable logic
• High switching frequency range from 100kHz to 1.2 MHz
• Provides synchronous rectified and non-rectified output
• Energy saving with variable frequency control

The working principle of the LM3670MF-1.2/NOPB involves the steps of converting an input voltage to a higher or lower output voltage. The circuit consists of a power switch that is switched on and off at a fixed frequency in order to switch the output voltage. The power switch is turned on when the feedback voltage is lower than the reference voltage and turned off when the feedback voltage is higher than the reference voltage. When the power switch is turned on, the input voltage is applied to the output and charge is stored in an inductor. When the power switch is turned off, the charge stored in the inductor is released to the output. This process is repeated rapidly at a fixed frequency, allowing the output voltage to be converted to a lower output voltage.

The efficient operation of the LM3670MF-1.2/NOPB is enabled by its wide operating temperature range, low quiescent current and programmable frequency. The LM3670MF-1.2/NOPB also offers additional protection features, such as over-current, over-temperature and under-voltage protection. The LM3670MF-1.2/NOPB is an ideal choice for a variety of applications, including transportation, industrial, computing and consumer electronics.

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