12V rail, dual-output buck controller
The ADM1051AJRZ-REEL7 is a step-down (buck) switching regulator controller from Analog Devices, designed to drive external N-channel MOSFETs from a fixed 12V supply rail (Vcc/Vdd). It provides two transistor-driver outputs in a positive output configuration, making it suitable for applications requiring a regulated lower voltage from a 12V bus without an integrated synchronous rectifier. The controller includes Enable, Frequency Control, and Power-on Reset control features, but does not support clock synchronization — the switching frequency is set by external components and runs free.
Supply and temperature envelope
Operating from a single 12V supply, the ADM1051AJRZ-REEL7 is a single-phase (1 output phase) controller. The 12V rail powers both the control logic and the gate drive for the external MOSFETs — the same rail that the buck converter steps down. Rated for a 0°C to 70°C ambient operating range, this part is specified for commercial-temperature environments — indoor equipment, bench supplies, and telecom line cards where the enclosure stays climate-controlled.
Active lifecycle and compliance
It is ROHS3 compliant, meeting the latest EU restriction-of-hazardous-substances directive for lead-free soldering processes. Supplied in Bulk packaging (not tape-and-reel), this variant is suited for prototype builds, small-batch production, or rework where individual tube or tray quantities are preferred over reeled inventory.