Quiescent current can be as low as 2.1µA and, depending on variant, the output is fixed at 2.5V, 3.3V or 5V.
“The device provides a very fast response against line voltage transient and load current transient, and ensures no overshoot voltage occurs during start-up and short-circuit recovery,” according to the company.
The part is AEC-Q100 Grade 1 complaint for automotive use, operates across -40 to +125°C ambient and supports PPAP documentation.
One possible “application is [in] an ultra-wideband sensor in a digital key
system which operates even when the vehicle is turned off”, said Diodes.
Typical dropout voltage is 35mV with a 10mA load and 350mV at 100mA.
Power supply rejection ratio is up to 85dB at 1kHz.
The stability of LDO regulators is sensitive to the output capacitor value. With this device, an X7R or X5R ceramic capacitor between 2.2 and 100µF is recommended, but it can be as low as 1μF. The input requires a 1μF ceramic capacitor, but this one can be arbitrarily high.
Packaging is 2.8 x 3mm five pin SOT25 or 6.5 x 7mm three pin SOT223. Junction-to-board thermal resistance is ~90 or 52°C/W respectively.
Over-temperature protection is provided, as is short-circuit protection.
Line and load transient graphs are in AP7369Q data sheet on this Diodes web page
Recently, Ablic claimed to have the lowest quiescent current automotive LDO, but only by 100nA compared to the one above.
I remember when cars had this amazing thing called ‘the key’ which turned everything off so the battery didn’t go flat if you left the car unused whilst you went abroad for two weeks on holiday.