ISL9003A Datasheet, PDF (1/12 Pages) Intersil Corporation – Low Noise LDO with Low IQ and High PSRR

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Data Sheet
October 1, 2009
ISL9003A
FN6299.4
Low Noise LDO with Low I_Q and High
PSRR
ISL9003A is a high performance single low noise, high
PSRR LDO that delivers a continuous 150mA of load
current. It has a low standby current and is stable with 1µF of
MLCC output capacitance with an ESR of up to 200mΩ.
The ISL9003A has a very high PSRR of 90dB and output
noise is 20µV_RMS (typical). When coupled with a no load
quiescent current of 31µA (typical), and 0.5µA shutdown
current, the ISL9003A is an ideal choice for portable wireless
equipment.
The ISL9003A comes in many fixed voltage options with
±1.8% output voltage accuracy over temperature, line and
load. Other output voltage options are available on request.
Pinouts
ISL9003A
(5 LD SC-70)
TOP VIEW
VIN
15
VO
GND
2
EN
34
CBYP
ISL9003A
(6 LD 1.6x1.6 µTDFN)
TOP VIEW
VO 1
GND 2
CBYP 3
6 VIN
5 NC
4 EN
Features
• High Performance LDO with 150mA Continuous Output
• Excellent Transient Response to Large Current Steps
• Excellent Load Regulation:
<0.1% voltage change across full range of load current
• Very High PSRR: >90dB @ 1kHz
• Wide Input Voltage Capability: 2.3V to 6.5V
• Extremely Low Quiescent Current: 31µA
• Low Dropout Voltage: Typically 200mV @ 150mA
• Low Output Noise: Typically 20µV_RMS @ 100µA (1.5V)
• Stable with 1µF to 4.7µF Ceramic Capacitors
• Shutdown Pin Turns Off LDO with 1µA (max) Standby
Current
• Soft-start Limits Input Current Surge During Enable
• Current Limit and Overheat Protection
• ±1.8% Accuracy Over all Operating Conditions
• 5 Ld SC-70 Package or 6 Ld µTDFN 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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