5V fixed LDO for automotive power rails
The STMicroelectronics L4995AKTR is a single-output, positive fixed 5V linear regulator rated for 500mA continuous output, with a maximum input voltage of 31V. It is qualified to AEC-Q100, making it suitable for under-hood and cabin automotive modules that must survive -40°C to 150°C ambient. The 160µA quiescent current keeps the load on the battery small during key-off or standby modes. Control features include Enable and Reset outputs — the reset output signals when the regulated rail is within tolerance, useful for sequencing an MCU or sensor supply.
Protection and control features
Built-in over-temperature and short-circuit protection are standard for this class. The Enable pin lets you shut down the output for power sequencing or low-power sleep modes. The Reset output is an open-drain flag that goes low when the output drops below regulation — tie it to an MCU reset input or a supervisor. No external capacitors are required for basic operation, but a 1µF ceramic on the input and a 1µF on the output close to the pins is good practice for transient response and stability.
Sourcing and lifecycle
No last-time-buy or end-of-life notice is on record. The LDFPVR is an adjustable 1A part with a 16V input max.