ISL9021A Datasheet, PDF (1/10 Pages) Intersil Corporation – 250mA Single LDO with Low IQ, Low Noise and High PSRR LDO

250mA Single LDO with Low I_Q, Low Noise and High
PSRR LDO
ISL9021A
The ISL9021A is a single LDO, which provides high
performance, low input voltage and high PSRR. It delivers
guaranteed continuous 250mA load current and is stable with
1µF to 4.7µF of output capacitance (±30%) with an ESR range
of 5mΩ to 400mΩ.
The input voltage range for the ISL9021A is between 1.5V to
5.5V and the output voltage comes in many fixed voltage
options with ±1.8% accuracy over-temperature, line and load
ranges. The ISL9021A has typical PSRR of 75dB @ 10kHz and
50dB @ 1MHz.
The reverse current protection feature prevents current from
flowing back to the power source when the output voltage is
pulled higher than the input.
The ISL9021A is offered in tiny 4-bump 2mmx2mm WLCSP
and 1.6mmx1.6mm 6 Ld µTDFN packages.
Related Literature
• See FN6867, ISL9021 “250mA Single LDO with Low IQ, Low
Noise and High PSRR LDO”
Features
• High Performance LDO with 250mA Guaranteed Continuous
Output Current
• Input Voltage Range: 1.5V to 5.5V
• Output Voltage Range: 1.2V to 3.3V
• High PSRR: 75dB @ 10kHz, 50dB @ 1MHz
• Low Quiescent Current: 35µA
• Dropout Voltage: <150mV @ 250mA
• Stable with 1µF to 4.7µF Output Capacitance (±30%) with
an ESR range of 5mΩ to 400mΩ
• ±1.8% Output Accuracy Over-Temperature/Load/Line
• Soft-start Limits Input Current Surge During Enable
• Current Limit and Overheat Protection
• -40°C to +85°C Operating Temperature Range
• Available in 2mmx2mm 4-bump WLCSP Package and
1.6mmx1.6mm 6 Ld µTDFN
• Pb-free (RoHS compliant)
Applications
• PDAs, Cell Phones and Smart Phones
• Portable Instruments, MP3 Players
• Handheld Devices including Medical Handhelds
VIN (1.5V TO 5.5V)
ON
ENABLE
OFF
C1
ISL9021A
VIN
VO
EN
GND
C2
VOUT
FIGURE 1. TYPICAL APPLICATION
C1, C2: 1µF X5R CERAMIC CAPACITOR
May 27, 2011
1
FN7845.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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