MAX668/MAX669
General Description
The MAX668/MAX669 constant-frequency, pulse-widthmodulating (PWM), current-mode DC-DC controllers are designed for a wide range of DC-DC conversion applications including step-up, SEPIC, flyback, and isolated-output configurations.
Power levels of 20W or more can be controlled with conversion efficiencies of over 90%.
The 1.
8V to 28V input
voltage range supports a wide range of battery and AC-powered inputs.
An advanced Bi
CMOS design features low operating current (220μA), adjustable operating frequency (100kHz to 500kHz), soft-start, and a SYNC input allowing the MAX668/MAX669 oscillator to be locked to an external clock.
DC-DC conversion efficiency is opt...