MAX16903SAUE33+

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The MAX16903SAUE33+ is a DC-DC switching regulator, which is a type of voltage regulator that uses a switching transistor in its output stage to regulate voltage instead of using a linear regulator. Configurable for either step-up or step-down operation, the MAX16903SAUE33+ provides up to 2.5A of continuous output current. Along with its stable voltage output, it also provides excellent current accuracy, line and load regulation, and fast transient response.

This DC to DC switching regulator is designed to provide variable output voltage from sources such as batteries, AC adapters, and other sources. The output can be set in one of two ways: voltage mode, where the output voltage is set directly; or current mode, where the output is designed to maintain a constant output current. It is efficient, as it operates using Pulse Width Modulation switching technology that puts power only when it is needed, helping to reduce power consumption and heat dissipation. The MAX16903SAUE33+ also includes built-in features such as tracking, changing the output voltage in order to follow the change in input voltage; soft start, which ramps up the output voltage slowly to avoid large inrush currents at start up; and input current limiting, limiting the current while in the CCM or combined conduction mode.

The MAX16903SAUE33+ can be used in a wide variety of applications. It can be used for powering small portable devices such as cell phones and PDAs, as well as to power embedded systems, such as industrial control systems and embedded automation equipment. The MAX16903SAUE33+ is also well suited for use in automotive applications for in-vehicle passenger entertainment systems, instrument clusters, and lighting control systems.

The MAX16903SAUE33+ operates on the principle of pulse-width modulation. A high-frequency oscillator generates a clock signal which controls the switching transistors which modulate the output voltage. The width of the output pulses is adjusted in order to provide the desired output voltage. The switching frequency can be adjusted in order to optimize performance and minimize EMI, while the output voltage is likewise adjustable by an external control voltages. The operating frequency is typically set in the range of 500kHz or lower.

The MAX16903SAUE33+ is available in a small DFN package, which makes it ideal for portable applications where space is limited. The low quiescent current draw and low voltage drop across the power MOSFETs, combined with the high efficiency of switching regulators make the MAX16903SAUE33+ a great choice for powering low voltage portable and embedded systems.

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