500 mA LDO, 1.5 V fixed rail with 58 dB PSRR
The LT3021EDH-1.5#PBF is a 500 mA low-dropout linear regulator from Analog Devices, delivering a fixed 1.5 V output from a maximum 10 V input rail. Dropout is 285 mV max at full load — the input-to-output headroom must stay above that across the current range to keep the rail in regulation. PSRR is 58 dB at 120 Hz, meaning it rejects line-frequency ripple well enough to power sensitive analog front-ends without a post-filter.
Quiescent current and protection set
Quiescent current is 250 µA typical, rising to 10 mA max under supply — the low idle draw suits always-on or battery-backed rails where every microamp counts. Built-in protection covers over-current, over-temperature, and reverse polarity — the regulator survives a reversed input without external Schottky clamping. The enable pin lets the system designer gate the output for sequenced power-up or shutdown, pulling the regulator into shutdown mode.
Package, temperature grade, and compliance
Housed in a 16-lead WFDFN with exposed pad (5x5 mm), the LT3021EDH-1.5#PBF is surface-mount and requires a thermal land on the PCB to dissipate the 500 mA load heat. Active lifecycle status and ROHS3 compliant per manufacturer records.