Low-dropout voltage regulator withstands and maintains regulation during voltage transients

The Texas Instruments’ TPS7A19 is a low-dropout linear regulator (LDO) with a wide input voltage (VIN) range up to 40V, capable of sourcing high output current (IOUT) up to 450mA. This voltage regulator is ideal for generating a low-voltage supply from wide input-voltage rails. Not only does the device supply a well-regulated voltage rail, but the device also withstands and maintains regulation during voltage transients by acting as a simple surge protection circuit. The device consumes only 15µA of quiescent current (IQ) at light loads, thereby lowering the power consumption for always-on or battery-powered applications. It features integrated thermal shutdown and overcurrent protection. It also offers a power good output (PG) with a programmable delay that indicates when the output voltage is in regulation. This feature is useful for power-rail sequencing functions. This LDO is available in a small, 3mm × 3mm, thermally-enhanced, 8-pin SON package.