MAX668 Datasheet (Maxim) - 1.8V to 28V Input / PWM Step-Up Controllers

MAX668, 1.8V to 28V Input / PWM Step-Up Controllers

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 effici

MAX668 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 optimized with a low 100mV current-sense voltage as well as with Maxim’s proprietary