The Si9182 is a 250-mA CMOS LDO (low dropout) voltage regulator. The device features ultra low ground current and dropout voltage to prolong battery life in portable electronics. The Si9182 offers line/load transient response and ripple rejection superior to that of bipolar or BiCMOS LDO regulators. The device is designed to maintain regulation while delivering 500-mA peak current. This is useful for systems that have high surge current upon turn-on. The Si9182 is designed to drive the lower cost ceramic, as well as tantalum, output capacitors. The device is guaranteed stable from maximum load current down to 0-mA load. In addition, an external noise bypass capacitor connected to the device’s CNOISE pin will lower the LDO’s output noise for low noise applications. The Si9182 also includes an out-of-regulation error flag. When the output voltage is 5% below its nominal output voltage, the error flag output goes low. If a capacitor is connected to the device’s delay pin, the error flag output pin will generate a delayed power-on-reset signal.