300 kHz buck controller with synchronous rectification
The MAX1954AEUB+ is a current-mode PWM buck controller from Analog Devices, designed for step-down (buck) conversion in a 10-uMAX/uSOP package. It integrates a transistor driver output and synchronous rectifier, targeting point-of-load and intermediate bus regulation where board space is tight. Switching at a fixed 300 kHz, the controller delivers up to 91% duty cycle from a single positive output, operating from a 3 V to 13.2 V supply rail. The 300 kHz frequency balances external inductor and capacitor size against switching losses — a common sweet spot for 12 V intermediate bus conversion.
Housed in a 10-TFSOP / 10-MSOP (0.118", 3.00 mm Width) package, the MAX1954AEUB+ is supplied in Tube format. The 10-uMAX/uSOP footprint is a common small-outline package for controller ICs — the 0.50 mm pitch requires standard SMT assembly processes with no special via-in-pad demands. The 85°C ceiling suits most indoor power supplies, telecom line cards, and base-station intermediate rails where the controller itself is not directly exposed to the hot air stream.
Active production, RoHS3 compliant
Fully RoHS3 compliant (2011/65/EU + 2015/863), the part is lead-free and meets the latest restriction standards for electronic equipment placed on the EU market.