Ultra-Low Quiescent Current LDO


  • Ultra-low Quiescent Current: 250 nA (typical)
  • Ultra-low Shutdown Supply Current
  • Small Package Size to Help Reduce Bill of Material (BOM) Cost
  • Stable With Cost-effective Ceramic Capacitor that Provides Lower Output Noise

The MCP1811/12 devices are 150 mA (MCP1811) and 300 mA (MCP1812) Low Dropout (LDO) linear regulators that provide high-current and low-output voltages while maintaining an ultra-low 250 nA of quiescent current during device operation. In addition, the MCP1811B/12B can be shut down for 5 nA (typical) supply current draw. The 150/300 mA output current capability, combined with the low output-voltage capability, make the MCP1811/12 family a good choice for new ultra-long-life LDO applications that have high-current demands but require ultra-low power consumption during sleep periods.


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  • Extend battery life by consuming less current during standby or with light load
  • Output current capability:
    • 150 mA for MCP1811A/B
    • 300 mA for MCP1812A/B
  • Input voltage range: 1.8V to 5.5V
  • Standard output voltages (VR): 1.0V to 4.0V
  • Constant low dropout voltage: 550 mV
  • Stable with ceramic output capacitor: 
    • 1.0 μF for MCP1811
    • 2.2 μF for MCP1812
  • Overcurrent protection
  • Output discharge (Shutdown mode, SHDN = GND)


  • Portable and IoT devices
  • Emergency kits
  • Home equipment
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