ISL9001A Datasheet, PDF (1/11 Pages) Intersil Corporation – LDO with Low ISUPPLY, High PSRR

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Data Sheet
March 27, 2008
ISL9001A
FN6433.2
LDO with Low I_SUPPLY, High PSRR
ISL9001A 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 output
capacitance of 1µF to 10µF with ESR of up to 200mΩ.
The ISL9001A has a very high PSRR of 90dB and output
noise less than 30µV_RMS. 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 ISL9001A is an ideal choice for portable wireless
equipment.
The ISL9001A provides a P_GOOD signal with delay time
programmable through an external capacitor.
Several different fixed 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.
Pinout
ISL9001A
(8 LD DFN)
TOP VIEW
VIN 1
EN 2
CBYP 3
CPOR 4
8 VO
7 POR
6 NC
5 GND
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 30µV_RMS @ 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
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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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