LM27402MHX/NOPB

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LM27402MHX/NOPB is a monolithic step-down power supply intensively ranging from 0.6V to 24V with a programming ratio up to 200:1, making it the ideal choice for power-restricted voltage applications. It reduces noise and ripple, thereby optimizing system performance and increasing end-products’ switching efficiency. This DC DC switching controller is the perfect choice for automotive, telecom and networking, tablets, laptops, printers, monitors and more.

As being a large-ratio power supply, LM27402MHX/NOPB efficiently offers a wide range of operating temperature levels, from -40 °C to +125 °C. Its operation supports up to 4-MHz switching frequency and allows for a higher load current of 2.5A. This controller adapts its compensator synchronously to any output voltage range. The input voltage is rated from 4V to 36V maximum.

LM27402MHX/NOPB is also a step-down converter that works by reducing the output voltage and increasing the current of the power supply. This is done by a switch that moves the current in the necessary direction, allowing the voltage to drop. When the input voltage falls below the set output level, the switch is opened, allowing the current to the output to be drawn from the input voltage. When the input voltage increases, the switch is closed once again, ensuring that the output voltage remains constant.

The IC features a wide range of features geared towards minimizing component clutter and size. The IC includes clock synchronization and hysteretic controller, which eliminates the need for external clock component, thereby significantly reducing component count and space required. Furthermore, the IC includes undervoltage lockout, which helps to protect the IC from transients and ensures the output voltage is not greater than the input voltage. The PGOOD signal monitors the output voltage, while the FAULT and PGOOD signals report the status of each stage on the IC, allowing the user to easily monitor and adjust.

The LM27402MHX/NOPB also has an adjustable soft-start feature which allows the current to slowly ramp up, reducing in-rush current. This helps to reduce stress on the power system and device, preventing the risk of thermal damage and extending the life span of the system. Furthermore, the IC includes an adjustable current limit, helps to protect the system from overload and overcurrent.

Further, it provides support for EXT pin with wide operating range and HicCup protection up to 40ms, which enables current limiting, thermal protection as well as undervoltage/overvoltage protection, so as to improve the safety of the system.

All in all, the LM27402MHX/NOPB is a great DC DC switching controller solution that offers superior performance, low power consumption and high efficiency. Its wide operating temperature range and undervoltage/overvoltage protection make it ideal for powering a range of consumer and industrial applications. With its integrated feature, the IC reduces external component count, helping to reduce space and cost. Additionally, the wide frequency range and adjustable current limit make this IC the perfect choice for any voltage regulation job.

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