ISL9021

250mA Single LDO with Low I<sub>Q</sub>, Low Noise and High PSRR LDO

Product Status: Mass Production

OVERVIEW

The ISL9021 is a single LDO providing high performance low input voltage, 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 ISL9021 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. Other output voltage within the range of 0.9V to 3.3V may be available upon request. The ISL9021 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 ISL9021 is offered in tiny 4-bump 1.155mmx0.975mm WLCSP and 1.6mmx1.6mm 6 Ld µTDFN packages.

KEY FEATURES

  • High Performance LDO with 250mA guaranteed continuous output current
  • Input Voltage Range: 1.5V to 5.5V
  • Output Voltage Range: 0.9V 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 1.155mmx0.975mm 4-bump WLCSP Package and 1.6mmx1.6mm 6 Ld µTDFN
  • Pb-free (RoHS compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL9021
Basic Information
Production Status
Mass Production
Input Voltage Min (V)
1.5
Input Voltage Max (V)
5.5
External Bias
No
Output Voltage Min (V)
0.9
Output Voltage Max (V)
3.3
Fixed Output Voltage Option
Yes
O/P Voltage Accuracy (%)
±1.8
Output Current 1 Max (A)
0.25
PSRR (dB)
60
Qualification Level
Standard
Noise (μVRMS 10Hz to 100kHz)
13
IQ
35 µA
Drop Out Voltage Typ (mV)
150 @ 250mA
Enable/Shutdown
Yes
# of PORs
N/A
PGOOD Output
No
Input Voltage Range (V)
1.5 to 5.5
Output Voltage Range (V)
0.9 to 3.3
Can Sample
YES
Temperature Range
-40 to +85

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