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 5mΩ to 400mΩ.

Features
• High Performance LDO with 250mA Guaranteed Continuous Output Current
• Input Voltage Range: 1.5V to 5.5V
• Output Voltage Range: 1.2V to 3.3V
• High PSRR: 75dB @ 10kHz, 50dB @ 1MHz
• Low Quiescent Current: 35µA
• Dropout Voltage: <150mV @ 250mA
• Stable with 1µF to 4.7µF Output Capacitance (±30%) with an ESR range of 5mΩ to 400mΩ
• ±1.8% Output Accuracy Over-Temperature/Load/Line
• Soft-start Limits Input Current Surge During Enable
• Current Limit and Overheat Protection
• -40°C to +85°C Operating Temperature Range
• Available in 2mmx2mm 4-bump WLCSP Package and 1.6mmx1.6mm 6 Ld µTDFN
• Pb-free (RoHS compliant)

Applications
• PDAs, Cell Phones and Smart Phones
• Portable Instruments, MP3 Players
• Handheld Devices including Medical Handhelds