300 mA adjustable LDO — headroom and quiescent trade-offs
The LP3982IMM-ADJ delivers 300 mA continuous output from an adjustable 1.25 V to 6 V range, with a maximum dropout voltage of 220 mV at full load — meaning the input rail must stay at least 220 mV above the set output voltage across load and temperature to maintain regulation. Quiescent current is 270 µA typical, which sets the baseline power draw on the input rail even when the output is unloaded — relevant for battery-powered circuits where the regulator's own consumption competes with the load's sleep current. The single regulator output is positive and adjustable via external feedback resistors; the enable pin lets a logic signal shut down the output for power sequencing or low-power standby modes.
Industrial temperature range and protection features
Built-in over-current and over-temperature protection allow the regulator to survive output shorts or thermal overload without external foldback circuitry — the part self-limits and recovers when the fault clears. Maximum input voltage is 6 V, which limits the upstream supply to 5 V regulated rails or lower — not suitable for direct connection to unregulated 12 V or 24 V buses without a pre-regulator.
Package and board integration
Cut Tape works for prototype or low-volume builds.
ROHS3 compliant per the manufacturer's declaration, with no exemptions that would restrict EU or California market use.