3.0 V fixed LDO — 150 mA ceiling, SOT-23-5 footprint
The LP2985IM5X-3.0: Input voltage range extends to 16 V, and the maximum dropout is 0.58 V at full load — budget at least 600 mV headroom between the input rail and 3.0 V across temperature to stay in regulation.
Dropout, quiescent current, and ripple rejection — the load-bearing specs
Quiescent current is 95 µA typical — low enough for battery-powered gear that spends most of its time in a light-load state, but not the ultra-low-Iq class for always-on micro-power nodes. The 2.5 mA maximum supply current covers the internal bias and protection circuits. PSRR is 45 dB at 1 kHz — this attenuates 100 mV of 1 kHz ripple on the input to roughly 560 µV at the output. For upstream switching noise above 100 kHz, expect less rejection; the LDO alone won't clean a noisy buck converter's output without a post-filter. An enable pin lets the system pull the output to zero and drop the quiescent draw to near-zero in standby.
Active production — RoHS non-compliant, legacy BOMs only
RoHS compliance is listed as non-compliant. This part is intended for legacy BOMs that do not require RoHS conformance, or for applications with an explicit exemption. For new designs requiring RoHS compliance, a tin-lead-free equivalent in the same family should be selected.
The SOT-23-5 package is widely stocked across the supply chain, but the RoHS non-compliant status narrows the pool of ready inventory. Lead time and lot traceability are provided with each RFQ response.