MAX17245ETESA+T

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MAX17245ETESA+T Application Field and Working Principle

The MAX17245ETESA is a simple, high-efficiency, synchronous step-down MAX17245ETESA+T DC-DC converter. It is suitable for mobile devices, tablets, and other ultra-low-power devices with typical input voltage range of 0.9V to 4.5V.

The MAX17245ETESA+T has a constant output voltage, efficient operation in the low-power range, low input quiescent current, and fast transient response. The MAX17245ETESA+T features a unique frequency hopping control technique that maximizes light-load efficiency. This control technique also prevents frequencyfolding over Shoot-Through current protection, making it very suitable for high-side operation or for using low-cost bypass capacitors.

Input Capability

The input of the MAX17245ETESA+T can support a wide range of input voltages from 0.9V to 4.5V. Its input voltage is maximum when the input stage is enabled. The MAX17245ETESA+T also has wide input transient protection.

Output Capability

The output voltage of the MAX17245ETESA+T can be adjusted between 0.8 V and 5.5 V. It can also provide up to 10A of output current. It has high source and sink current capability and high output voltage accuracy. The MAX17245ETESA+T also has a fast transient response time, allowing fast load and line transients to be handled without causing large output voltage overshoots.

Efficiency

The MAX17245ETESA+T uses synchronous rectification which can achieve up to 95% efficiency. It also features low input quiescent current of typically 6.5uA. The MAX17245ETESA+T is suitable for use in ultra-low-power applications, where high efficiency and low current consumption are necessary.

Protection Features

The MAX17245ETESA+T features a number of protection features. These include over-current protection, over-voltage protection, short-circuit protection, and thermal shutdown protection. The MAX17245ETESA+T can also be used with external components to provide inrush current limiting, overvoltage protection, and soft-start functionality.

Working Principle of MAX17245ETESA+T

The MAX17245ETESA+T is a DC-DC switching regulator that works by converting a DC input voltage to an output voltage. The input voltage is fed to the input stage, where it is converted to a high-frequency AC voltage. This AC voltage is then applied to an inductor, which stores energy in the form of a magnetic field. When the high-frequency AC voltage is applied to the inductor, current flows through the inductor and the magnetic field generated by the inductor stores energy. When the AC voltage is stopped, the magnetic field collapses and this energy is then transferred to the output stage, where it is converted back to the desired DC output voltage.

The MAX17245ETESA+T features frequency hopping which increases the efficiency of the DC-DC switching regulator. This is achieved by changing the frequency of the AC voltage applied to the inductor in a random fashion. By reducing the duty cycle of the switching frequency and increasing the duty cycle of the non-switching periods, the light-load efficiency of the regulator is improved.

In summary, the MAX17245ETESA+T is a high-efficiency, synchronous step-down DC-DC switching regulator. Its input voltage can range from 0.9V to 4.5V, and it can provide up to 10A of output current. It has high source and sink current capability and high output voltage accuracy. It also has a number of protection features, such as over-current, over-voltage, and thermal protection. Lastly, it features a frequency hopping control technique which increases light-load efficiency.

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