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2022-09-24 20:26:29
MAX668EUB+TMaximIntegrated switch controller
Maxim's MAX668/MAX669 PWM Boost Controllers are constant-frequency, pulse-width-modulated (PWM) current-mode DC-DC controllers. These devices are designed for use in a variety of DC-DC conversion applications, including boost, SEPIC, flyback, and isolated output configurations. Power levels of 20W or more can be controlled with conversion efficiencies exceeding 90%. The 1.8V to 28V input voltage range supports a variety of battery and AC powered inputs. The advanced BiCMOS design features low operating current (220µA), adjustable operating frequency (100kHz to 500kHz), soft-start and a sync input, allowing the MAX668/MAX669 oscillators to be locked to an external clock. The MAX669 is optimized for low input voltages with a 1.8V start-up voltage, requiring bootstrap operation. It supports output voltages up to 28V. The MAX 668 operates from inputs as low as 3V and can be connected in either a bootstrap or non-bootstrap configuration (powering the IC from the input voltage or another voltage)