Buck power conversion by the MAX639 + 5V fixed output

As shown in FIG constituted by MAX639 + 5V fixed output buck power conversion. MAX639 is a high-efficiency, step-down DC/DC converter. Input voltage range of 5.5V to 11.5V, the

output voltage of + 5V fixed or adjustable voltage, output current of 100mA, the conversion efficiency as high as 90%, with low-battery detection and work/shutdown mode control.

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