LDO with Low ISUPPLY, High PSRR

ISL9001 is a high performance Low Dropout linear regulator capable of sourcing 300mA current. It has a low standby current and high-PSRR and is stable with an output capacitance of 1μF to 10μF with an ESR of up to 200mΩ.

The ISL9001 has a very high PSRR of 90dB and outputs noise less than 30μVRMS. A reference bypass pin allows connection of a noise-filtering capacitor for low-noise and high-PSRR applications. When coupled with a no load quiescent current of 25μA (typical), and 0.1μA shutdown current, the ISL9001 is an ideal choice for portable wireless equipment.

The ISL9001 provides a power-good signal with delay time programmable with an external capacitor.

Features

? 300mA high performance LDO

? Excellent transient response to large current steps

? Excellent load regulation: <0.1 voltage change across full range of load current

? High PSRR: 90dB @ 1kHz

? Wide input voltage capability: 2.3V to 6.5V

? Extremely low quiescent current: 25μA

? Low dropout voltage: typically 200mV @ 300mA

? Low output noise: typically 30μVRMS @ 100μA (1.5V)

? Stable with 1μF to 10μF ceramic capacitors

? Soft-start to limit input current surge during enable

? Current limit and overheat protection

? Delayed POR, programmable with external capacitor

? ±1.8 accuracy over all operating conditions

? Tiny 2mmx3mm 8 Ld DFN package

? -40°C to +85°C operating temperature range

? Pb-free (RoHS compliant)

Applications

? PDAs, cell phones and smart phones

? Portable instruments, MP3 players

? Handheld devices, including medical handhelds