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MAX669

Part Number	MAX669
Manufacturer	Maxim
Description	1.8V to 28V Input / PWM Step-Up Controllers
Published	May 2, 2005
Detailed Description	MAX668/MAX669 General Description The MAX668/MAX669 constant-frequency, pulse-widthmodulating (PWM), current-mode DC-DC...
Datasheet	MAX669 PDF File

Overview

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 BiCMOS 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...

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