The TPS745 is an adjustable 500-mA low-dropout (LDO) regulator with power-good functionality. This device is available in a small, 6-pin,
2-mm × 2-mm WSON package and consumes very
low quiescent current and provides fast line and load transient performance. The
TPS745 features an ultra-low dropout of 130 mV at 500 mA that can help
improve the power efficiency of the system.
The TPS745 is optimized for a wide variety of applications by
supporting an input voltage range from 1.5 V to 6.0 V and an externally adjustable output range of
0.55 V to 5.5 V. The low output voltage enables this LDO to power the modern microcontrollers with
lower core voltages.
The TPS745 has a power-good (PG) output that
monitors the voltage at the feedback pin to indicate the status of the output voltage. The EN input
and PG output can be used for the sequencing multiple power sources in the system.
The TPS745 is stable with small ceramic output capacitors, allowing
for a small overall solution size. A precision band-gap and error amplifier provides high accuracy
of 0.7% (max) at 25°C and 1% (max) over temperature (85ºC). This device includes integrated thermal
shutdown, current limit, and undervoltage lockout (UVLO) features. The TPS745
has an internal foldback current limit that helps reduce the thermal dissipation during