MAX1705EEE+

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The MAX1705EEE+ by Maxim Integrated is a high-performance, high-efficiency synchronous step-down DC-DC converter. The device consists of an integrated high-side and low-side power MOSFET, current-mode PWM control, and a wide-bandwidth amplifier in a small 4mm x 4mm SOT-23-8 package. The device is ideal for applications requiring a high-efficiency, low noise power converter such as cellular handsets, PDAs and other space-limited portable applications.

The MAX1705EEE+ is a very efficient device when used in a step-down DC-DC converter configuration due to its integrated high-side and low-side MOSFETs. The device offers a wide range of enable and shutdown functions, current-mode PWM control with internal compensation, and wide bandwidth amplifier stages. The device is capable of supplying up to 2A of continuous output current from an input voltage of up to 6V.

The main principle of power conversion with the MAX1705EEE+ is based on a synchronous step-down converter configuration. In this configuration, an external high-side switch (PMOS) is connected between the input voltage source and the inductor. The signal to control the switch is generated by the internal current-mode PWM control. The signal is generated when the voltage at the internal error amplifier output (FB pin) reaches a certain level. When the voltage is below the set threshold, the signal is generated and the high-side switch (internal PMOS) is forced on. When the voltage exceeds the set threshold, the high-side switch is forced off and the output voltage is regulated to the desired value.

The MAX1705EEE+ features a low output quiescent current, low operational noise and high output voltage accuracy when operating in step-down mode. The device also features a wide range of protection features such as over-temperature shutdown, under-voltage lockout and output current protection. The device\'s output voltage accuracy is also very high, typically <1%.

In summary, the MAX1705EEE+ is an ideal solution for applications requiring high efficiency, low noise power conversion. The device integrates a high-side and low-side power MOSFET, current-mode PWM control and a wide-bandwidth amplifier in a small package. Moreover, the device is capable of supplying up to 2A of continuous output current from an input voltage of up to 6V.

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