LM2642MTCX

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The LM2642MTC/NOPB is a 500mA synchronous buck regulator, designed specifically for automotive, telecommunications, and other space constrained applications. It provides high efficiency, low noise operation and a wide input voltage range from 4V to 24V. The combination of a low quiescent current, a flexible array of power management features, and wide range of operating conditions make the LM2642MTC/NOPB part perfect for a variety of automotive and industrial applications. This power management integrated circuit (PMIC) provides comprehensive power management features with a wide input voltage range, high power efficiency, thermal management, robust fault protection, and low output voltage ripple.

Overview of LM2642MTCX Application Field

The LM2642MTCX is widely used as a component in automotive, telecommunications, and other space-constrained applications. The high power efficiency and wide input voltage range, make it suited for various automotive applications, including fuel injection systems, engine management systems, lighting systems, in-vehicle infotainment systems, and driver assistance systems. In addition, the LM2642MTCX is also ideally suited for non-automotive applications, such as consumer electronic products, industrial and medical equipment, and point-of-load power management solutions.

Working Principle of LM2642MTCX

The LM2642MTCX is a synchronous buck regulator that converts an input voltage between 4V and 24V to a lower output voltage. The LM2642MTCX features a high efficiency step-down regulator architecture, with an integrated low-side MOSFET and high-side MOSFET for the synchronous buck converter. The main component parts are comprised of a voltage reference, an error amplifier, a PWM control logic, a voltage control oscillator, an oscillator, and a driver circuit. The integrated MOSFETs provide high efficiency power conversion, low ESR, and excellent transient response for fast load step transitions. The device also has integrated current limit, thermal shutdown, and power-good protection.

The typical circuit for the LM2642MTCX shows a 16-pin through-hole package device that\'s powered by an input voltage of up to 24V and supplies a wide range of output voltages of up to 4.5V. The pin configuration consists of 12-volt input pins, four control pins (compensation, output voltage adjustment, soft start, and shutdown pins), and two GND pins. The device also offers protection features such as over-voltage cut-off, over-current protection, thermal shutdown, and cycle-by-cycle current limiting. It also has a low quiescent current of just 27µA, enabling it to achieve high efficiency with minimal power loss. The LM2642MTCX also features a low voltage differential voltage drop from the input to its output, making it ideal for automotive or other low-voltage power management applications.

Conclusion

The LM2642MTCX is an efficient and versatile synchronous buck regulator that is ideal for a variety of automotive, telecommunications, and other low-power power management applications. It has a wide input voltage range and high power efficiency, and its integrated low-side and high-side MOSFETs enable excellent transient response and fast load step transitions. It also has a range of protection features and low quiescent current. Therefore, it is an ideal power management integrated circuit (PMIC) for a variety of automotive, consumer electronic, industrial, and medical applications.

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