LM27342QMY/NOPB

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The LM27342QMY/NOPB is a synchronous buck DC-DC power converter specifically designed to supply a wide range of applications which requires high efficiency, high power density, and small solution size. It operates over a wide range of input voltages and provides a high level of output electrical performance. The device is capable of delivering up to 2A of regulated output current with a 2mV output voltage ripple and full load efficiency up to 90%. The LM27342QMY/NOPB uses advanced voltage mode and current mode control with internal soft-start to accurately regulate the output voltage as the load and input voltage changes. The integrated bootstrap functionality helps to reduce the external component count and throughput time, along with built-in input undervoltage protection to ensure a safe operation.

Application Field of the LM27342QMY/NOPB

The LM27342QMY/NOPB can be found in a wide variety of applications such as high by-pass switching regulators, high-current regulators, DC-DC converters, power supplies, battery-charging systems, and audio/video equipment.

Working Principle of the LM27342QMY/NOPB

The LM27342QMY/NOPB works on the principle of switched mode power supply (SMPS). This type of power converter employs a switching regulator that pulses the output voltage at a rate determined by the control loop. This enables the LM27342QMY/NOPB to take raw DC input and generate a clean, regulated DC output voltage. The LM27342QMY/NOPB also features an internal soft-start circuit to prevent inrush current and as well as built-in protections against input undervoltage and over current.

The LM27342QMY/NOPB is a synchronous buck regulator that operates by switching the input source between two power components; the power switch (transistor) and the diode. When the power switch is on, energy is transferred from the input side to the output side of the power supply. When the switch is off, barrier free flow of current is only possible through the diode. This process is reversed during each cycle, which serves to step down the voltage from the input side to the desired output voltage. The synchronous buck converter is a type of PWM (pulse width modulation) converter, regulating the output voltage by varying the on-time of the power switch.

The LM27342QMY/NOPB features advanced voltage and current mode control, enabling it to accurately regulate the output voltage. The device also offers integrated bootstrap functionality, allowing it to power the internal high-side switch directly and reducing the external component count. In addition, the LM27342QMY/NOPB offers many other features such as spread spectrum, temperature compensation and temperature soft-start.

Conclusion

The LM27342QMY/NOPB is a highly efficient and reliable DC-DC switching regulator, ideal for a wide range of applications that require high power density and small solution size. Operating over a wide range of input voltages and delivering up to 2A of regulated output current, the LM27342QMY/NOPB features advanced voltage and current mode control, integrated bootstrap functionality, spread spectrum, temperature compensation and temperature soft-start. These features enable the device to provide a high level of output electrical performance while reducing the external component count and throughput time.

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