DATASHEET ISL9021A 250mA Single LDO with Low IQ, Low Noise and High PSRR LDO FN7845 Rev 3.00 December 20, 2012 The ISL9021A is a single LDO, which provides high performance, low input voltage and high PSRR. It delivers guaranteed continuous 250mA load current and is stable with 1µF to 4.7µF of output capacitance (±30%) with an ESR range of 5m to 400m. The input voltage range for the ISL9021A is between 1.5V to 5.5V and the output voltage comes in many fixed voltage options with ±1.8% accura.