MAX15515GWP+T

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MAX15515GWP+T Application Field and Working Principle

The MAX15515GWP+T is a 3A synchronous step-down DC-DC converter from Maxim Integrated. It is a member of the MAX15515 family of 5mm x 5mm, 3A, low-noise, high-efficiency switching regulators to meet today’s needs for low-noise and high efficiency when size is a priority. The MAX15515GWP+T is suitable for voltage regulation in a wide range of applications including mobile, consumer, industrial, and networking use.

Features

The MAX15515GWP+T features a wide input voltage range of 4.5V to 18V, allowing the regulator to be used in direct-input powered systems. This device also features a programmable switching frequency of up to 2MHz, allowing the design of a high-efficiency power-conversion system, and an adjustable current limit of up to 3A. Other features include a power-saving, no-load quiescent current of 70μA, a shutdown current of 170μA, 1.1% typical load regulation, and a 0.5V adjust range.

Working Principle

MAX15515GWP+T works by applying the current pulse width modulation technique (PWM) to control the transfer of energy stored in the inductor. When the load current is small, MAX15515GWP+T is in the discontinuous conduction mode (DCM), which enables higher efficiency and improved output voltage noise. When the load current is large, it switches to continuous conduction mode to ensure stable output voltage.

The ripple-filtering capacitor of MAX15515GWP+T is connected in parallel with the external load to filter out the remaining spikes caused by switching. The appropriate value of the ripple-filtering capacitor must be selected according to the size of the load current and the expected ripple voltage.

Conclusion

In conclusion, MAX15515GWP+T is a highly-efficient, low-noise, low-cost synchronous buck-switching regulator. With its wide input voltage range and adjustable current limits, it is well-suited for use in a wide range of applications, including mobile, consumer, industrial and networking applications. In addition to its efficiency and noise-reduction capabilities, the device’s ripple filter cap helps to filter out the remaining spikes caused by switching, making it the perfect choice for your power-conversion needs.

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