3A, 1.5V fixed rail — dropout and thermal budget
The ADP1763WACPZ-1.5-R7 is a single-output positive LDO regulator from Analog Devices, fixed at 1.5V output and rated for 3A continuous. Maximum dropout is 145mV at full load — that 1.98V max input rail needs only 1.645V headroom to stay in regulation, so it runs cleanly off a 1.8V or 1.9V intermediate bus without a boost stage.
Control, protection, and quiescent draw
Integrated control features include Enable, Power Good, and Soft Start — Power Good asserts when the output reaches regulation, useful for sequencing downstream rails. Protection covers Over Current, Over Temperature, and Short Circuit; the part folds back or shuts down rather than letting the die exceed 125°C. Quiescent current is 8mA typical, with a maximum supply current of 16mA. The 8mA Iq is non-trivial for battery-powered always-on rails — budget it into the system standby current, not the load current.