5A fixed-output LDO for post-regulation and point-of-load
The Texas Instruments LMS1585AIS-1.5/NOPB is a 5A positive fixed-output LDO regulator in the DDPAK/TO-263-3 surface-mount package. It delivers a regulated 1.5V rail from an input up to 13V, with a maximum dropout voltage of 1.4V at full load.
Thermal and protection features for industrial duty
Operating from -40°C to 125°C, this LDO suits industrial control, telecom, and automotive environments where ambient temperatures push beyond commercial range. Built-in over-current and over-temperature protection let the regulator survive output shorts and sustained overloads without external crowbar circuitry. The 7 mA quiescent current is typical for a 5A LDO — not a micropower part, but acceptable for always-on rails in equipment with a modest standby budget.
PSRR and ripple rejection at line frequency
PSRR is specified at 60 to 72 dB at 120 Hz — the fundamental ripple frequency from a full-wave rectified 60 Hz mains input. 60 dB rejection means the output ripple is 1/1000th of the input ripple; a 100 mVpp input hum drops to 100 µVpp at the output, which is clean enough for most analog and digital loads.
Active lifecycle and compliance status
Because it is an active TI catalog item, the LMS1585AIS-1.5/NOPB is sourced through authorized distribution channels with full factory traceability and warranty.