17-channel sequencing with flexible output drive
The ADM1266ACPZ-R7 is a 17-channel voltage sequencer from Analog Devices, designed for managing power-up and power-down sequences in multi-rail systems. Its 17 monitored channels track each rail's threshold, with outputs configurable as open drain or push-pull to interface directly with enable pins on downstream converters or LDOs. The open-drain option allows wired-OR connections for fault sharing across multiple supervisors, while push-pull provides a clean logic-level drive without an external pull-up resistor — useful when driving the enable input of a buck converter that expects a rail-to-rail signal.
Package and thermal interface
Housed in a 64-WFQFN with exposed pad (64-LFCSP, 9x9 mm), the part relies on the central thermal pad soldered to a PCB copper plane for heat dissipation. The 0.5 mm pitch on the QFN perimeter demands careful solder-paste stencil design — a 4-mil step stencil with a 75-80% aperture reduction on the thermal pad area prevents solder bridging during reflow.