LDO for industrial and automotive supply rails
The Analog Devices LT1121AHVIS8#PBF is a single-output positive adjustable LDO regulator delivering 150 mA. It accepts an input up to 30 V.
Temperature grade and protection in harsh environments
The protection set includes over-temperature shutdown and reverse-polarity protection — the latter is a practical safeguard in field-wired equipment where a miswired supply can otherwise kill an unprotected LDO. An Enable pin (active-high) provides a means to sequence the rail or shut down the regulator in low-power sleep modes.
The SOIC-8 footprint is a standard low-profile package for linear regulators; thermal performance depends on PCB copper area — this 150 mA part typically does not require a dedicated heatsink in normal ambient conditions, but the 125°C junction rating should be checked against the application's power dissipation.
It remains a current-production line item suitable for new designs.