ISL9003A

Low Noise LDO with Low I<sub>Q</sub>, High PSRR

Product Status: Mass Production

OVERVIEW

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 20µVRMS (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.

KEY 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 at 1kHz
  • Wide Input Voltage Capability: 2.3V to 6.5V
  • Extremely Low Quiescent Current: 31µA
  • Low Dropout Voltage: Typically 200mV at 150mA
  • Low Output Noise: Typically 20µVRMS at 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)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL9003A
Basic Information
Production Status
Mass Production
Input Voltage Min (V)
2.3
Input Voltage Max (V)
6.5
External Bias
No
Output Voltage Min (V)
1.5
Output Voltage Max (V)
3.3
Fixed Output Voltage Option
Yes
O/P Voltage Accuracy (%)
±1.8
Output Current 1 Max (A)
0.15
PSRR (dB)
90
Qualification Level
Standard
Noise (μVRMS 10Hz to 100kHz)
20
IQ
29 µA
Drop Out Voltage Typ (mV)
200 @150mA
Enable/Shutdown
Yes
# of PORs
N/A
PGOOD Output
No
Input Voltage Range (V)
2.3 to 6.5
Output Voltage Range (V)
1.5 to 3.3
Can Sample
YES
Temperature Range
-40 to +85

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