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ISL9000A is a high performance dual LDO capable of sourcing

300mA current from each output. It has a low standby current

and very high PSRR and is stable with output capacitance of

1?F to 10?F with ESR of up to 200m¦¸.

The device integrates an individual Power-On-Reset (POR)

function for each output. The POR delay for VO2 can be

externally programmed by connecting a timing capacitor to the

CPOR pin. The POR delay for VO1 is internally fixed at

approximately 2ms. A reference bypass pin is also provided for

connecting a noise filtering capacitor for low noise and highPSRR applications.

The quiescent current is typically only 42?A with both LDO¡¯s

enabled and active. Separate enable pins control each

individual LDO output. When both enable pins are low, the

device is in shutdown, typically drawing less than 0.1?A.

Several combinations of voltage outputs are standard. Output

voltage options for each LDO range from 1.5V to 3.3V. Other

output voltage options may be available upon request.

Features

? Integrates two 300mA high performance LDOs

? Excellent transient response to large current steps

? ¡À1.8 accuracy over all operating conditions

? Excellent load regulation: < 0.1 voltage change across full

range of load current

? Low output noise: typically 30?VRMS @ 100?A (1.5V)

? Very high PSRR: 90dB @ 1kHz

? Extremely low quiescent current: 42?A (both LDOs active)

? Wide input voltage capability: 2.3V to 6.5V

? Low dropout voltage: typically 200mV @ 300mA

? Stable with 1?F to 10?F ceramic capacitors

? Separate enable and POR pins for each LDO

? Soft-start and staged turn-on to limit input current surge

during enable

? Current limit and overheat protection

? Tiny 10 Ld 3mmx3mm DFN package

? -40¡ãC to +85¡ãC operating temperature range

? Pb-free (RoHS compliant)

Applications

? PDAs, Cell Phones and Smart Phones

? Portable Instruments, MP3 Players

? Handheld Devices including Medical Handheld