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