Low-IQ PMIC for handheld gear — what the 225 µA means
The MAX1586AETM is a low-quiescent-current power-management IC from Maxim, built for handheld and mobile devices where every microamp on the battery rail matters. Its 225 µA supply current is the number a portable-system designer checks first: it tells you the PMIC itself won't eat the standby budget. The 2.6 V to 5.5 V input range covers a single-cell Li-ion through USB 5 V, so it fits right into a phone, tablet, or portable instrument without a separate pre-regulator.
Temperature range and environment
Rated for -40°C to 85°C ambient, this part handles outdoor handhelds, dash-mount gear, and factory-floor portable terminals. No AEC-Q100 sticker here, so it's not aimed at under-hood automotive, but the industrial temp range covers most mobile equipment that lives outside a climate-controlled office.
Package and layout — the 48-TQFN exposed pad
Houses in a 48-WFQFN with exposed pad, supplier device package 48-TQFN (7x7 mm). That exposed paddle is the main thermal path — your PCB layout needs a via stitch under it to pull heat into the ground plane. Without it, the part derates hard above 400 mA continuous, though the datasheet thermal curves tell the full story. Surface-mount only; no socket option, so plan for reflow or hot-air rework if you need to swap it in the field.
Lifecycle and compliance
The part is RoHS non-compliant, so if your BOM requires lead-free assembly, you'll need to qualify the MAX1586AETM+ (the lead-free variant) or work the exemption.