Dual LDO with Low Noise, Low IQ, and High PSRR

ISL9011A is a high performance dual LDO capable of sourcing 150mA current from Channel 1 and 300mA from Channel 2. The device has a low standby current and highPSRR and is stable with output capacitance of 1μF to 10μF with ESR of up to 200mΩ.

A reference bypass pin allows an external capacitor for adjusting a noise filter for low noise and high PSRR applications.

Features

• Integrates two high performance LDOs

- VO1 - 150mA output

- VO2 - 300mA output

• Excellent transient response to large current steps

• Excellent load regulation: <1 voltage change across full range of load current

• High PSRR: 70dB @ 1kHz

• Wide input voltage capability: 2.3V to 6.5V

• Extremely low quiescent current: 45µA (both LDOs active)

• Low dropout voltage: typically 120mV @ 150mA

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

• Stable with 1µF to 10µF ceramic capacitors

• Separate enable pins for each LDO

• Soft-start to limit input current surge during enable

• Current limit and overheat protection

• ±1.8 accuracy over all operating conditions

• Tiny 10 Ld 3mmx3mm DFN package

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

• Pin compatible with Micrel MIC2211

• Pb-free plus anneal available (RoHS compliant)

Applications

• PDAs, Cell Phones and Smart Phones

• Portable Instruments, MP3 Players

• Handheld Devices including Medical Handhelds