The low-noise and high-efficiency PWM step-down converting power supply circuit

Published:2011/7/24 3:29:00 Author:Seven | Keyword: low-noise, high-efficiency, power supply | From:SeekIC

In the figure is the adjustable step-down power supply which is based on the low-noise and high-efficiency PWM converter MAX887(8-SO package), and the external elements are few. The characters of it are: (1) the input voltage is from 3.5V to 11.5V, the output voltage is 1.25V to 10.25V; (2) the output current is 600mA, and the static current is 200μA, the standby mode is only 2.5μA; (3) the converting efficiency is 95%; (4) the fixed working frequency of MAX887 is 300KHZ, which effectively reduces the size and cost of the external element.



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