Package and board-fit — TSOT-23-5 footprint
The MIC5238-1.2YD5 TR comes in a SOT-23-5 Thin / TSOT-23-5 package, a 5-lead surface-mount footprint with a 0.95 mm pitch typical of small linear regulators. The supplier device package is TSOT-23-5, which shares the same land pattern as standard SOT-23-5 but with a thinner body profile — useful when the board stack-up has a tight clearance above the component. Supplied in Bulk packaging, not tape-and-reel — the MOQ and handling differ from reel-fed pick-and-place. For a reflow line, verify the feeder compatibility or plan a tube-to-reel transfer.
150 mA fixed 1.2 V — dropout and quiescent budget
This LDO delivers a fixed 1.2 V output at up to 150 mA, with a maximum dropout voltage of 0.5 V at full load. Quiescent current is 20 µA typical, with a maximum supply current of 2.5 mA. The 20 µA Iq suits battery-powered always-on blocks — a sensor node that sleeps and wakes on a threshold can leave this regulator enabled without draining the cell during idle periods.
The 125°C ceiling is the junction limit — derate the output current above 85°C ambient per the thermal resistance of the TSOT-23-5 package on the specific board copper area. Built-in protection includes over-current and over-temperature shutdown. The enable pin (active high) allows the system to gate the output — pulling it low drops the regulator into shutdown, reducing quiescent current further than the 20 µA operating figure.
The Bulk packaging means the lot may come as a tube or loose tray — confirm the exact format with the quote.