The MAX640 step-down switching regulators provide high efficiency over a wide range of load currents, delivering up to 225mA. A current-limiting pulse-frequency-modulated (PFM) control scheme gives the devices the benefits of pulse-width-modulated (PWM) converters (high efficiency at heavy loads), while using only 10µA of supply current (vs. 2mA to 10mA for PWM converters). The result is high efficiency over a wide range of loads.
The MAX640 input range is 4V to 11.5V, and the devices provide lower preset output voltages of 3.3V or, the output can be user-adjusted to any voltage from 1.3V to the input voltage.
The MAX640 have an internal 1A power MOSFET switch, making them ideal for minimum-component, low- and medium-power applications.
The MAX640 input range is 4V to 11.5V, and the devices provide lower preset output voltages of 3.3V or, the output can be user-adjusted to any voltage from 1.3V to the input voltage.
The MAX640 have an internal 1A power MOSFET switch, making them ideal for minimum-component, low- and medium-power applications.
SO8 Package
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