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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.

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 accuracy over-temperature, line and load

ranges. The ISL9021A has typical PSRR of 75dB @ 10kHz and

50dB @ 1MHz.

The reverse current protection feature prevents current from

flowing back to the power source when the output voltage is

pulled higher than the input.

The ISL9021A is offered in tiny 4-bump 0.975mmx1.155mm

WLCSP and 1.6mmx1.6mm 6 Ld μTDFN packages.

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 0.975mmx1.155mm 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 handheld