RT7272BGSP

RT7272BGSP is the SOP-8 exposed-pad ordering code for the Richtek RT7272B synchronous step-down converter, written word-for-word in the marking information of the Richtek DS7272B datasheet: the SP is the SOP-8 (exposed pad) option and the G is the Richtek Green finish, while the B version is the light-load PSM variant - the A version is forced-PWM, a different operating mode and not an interchangeable code. Its reference voltage is 0.788 V minimum, 0.800 V typical and 0.812 V maximum, oscillator frequency is 450 kHz minimum, 500 kHz typical and 550 kHz maximum, quiescent current is 0.9 mA typical and 1.2 mA maximum, shutdown current is 0.5 µA typical and 3 µA maximum, switch on-resistance is 150 mΩ typical high-side and 80 mΩ typical low-side, and the UVLO rising threshold is 3.9 V minimum, 4.1 V typical and 4.3 V maximum, over a 4.5 V to 36 V input range with output adjustable from 0.8 V to 30 V at up to 3 A. Richtek publishes no lifecycle field for the part; it is listed in the maker’s 2024-01 selection guide and the datasheet was revised to DS-11 in April 2025. The selection point is a wide-input 3 A rail for industrial controls, networking and point-of-load conversion where light-load efficiency matters. Parameters verified against the Richtek RT7272B datasheet DS7272B (ordering information, marking information and electrical characteristics).