LM2671MX-12

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The LM2671MX-12 is a member of the LM2671M series of synchronous step-down switching regulators from Texas Instruments. It is designed to deliver an output voltage of 12V from an input voltage range of 4.5V to 24V, with an adjustable output current of up to 500mA. In addition, it incorporates a Power Good output indicator, reverse current protection and pre-biased start-up capability.

The LM2671MX-12 is classified as a DC/DC switching regulator and falls into the PMIC (Power Management IC) family of integrated circuits. Specifically, it is classified as a Voltage Regulator and a DC-DC Switching Regulator.

DC/DC switching regulators are widely used in power electronics applications as they are extremely efficient and cost-effective. DC/DC converters are buck, boost, and buck-boost type regulators. The LM2671MX-12 is a buck type regulator, where the input voltage is stepped down to an output voltage that is lower than the input voltage.

The LM2671MX-12 is designed to deliver 12V from an input voltage range of 4.5V to 24V. It uses a synchronous switching topology, which uses two power MOSFETs – one boost MOSFET and one buck MOSFET. The MOSFETs switch alternately to charge the output capacitor, when the output voltage falls below the set value.

The operating voltage of the LM2671MX-12 can be programmed through the use of an external resistor divider. The control circuitry inside the device monitors the voltage on the output capacitor and adjusts the duty cycle of the boost MOSFET accordingly. When the output voltage reaches the desired level, the MOSFETs shut off, and the output voltage remains steady at the set value.

The LM2671MX-12 also features an Auto-Retry feature. This feature ensures that the device automatically tries to recover from a fault condition, such as an over-current or an over-temperature condition. If a fault condition occurs, the Auto-Retry feature will force the device to retry the operation until it succeeds in establishing the correct output voltage.

The LM2671MX-12 also incorporates reverse current protection and pre-biased start-up to ensure correct operation, even in the presence of high output capacitance. In addition, the device also integrates a Power Good output indicator to inform the circuit when the output voltage is within the correct operating range.

In conclusion, the LM2671MX-12 synchronous step-down switching regulator from Texas Instruments is a DC/DC converter suitable for applications that require a clean and accurate 12V output from an input voltage range of 4.5V to 24V. It is classified as a member of the PMIC family, specifically as a Voltage Regulator and a DC-DC Switching Regulator. The LM2671MX-12 features adjustable output current up to 500mA, Power Good output indicator, reverse current protection, pre-biased start-up and Auto-Retry function.

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