MCP1812A Ultra-Low Quiescent Current LDO Regulator

By Microchip Technology 134

MCP1812A Ultra-Low Quiescent Current LDO Regulator

The MCP1812 low drop-out regulators from Microchip Technology are 300 mA 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 MCP1812 can be shut down for 5 nA (typical) supply current draw. The MCP1812 family comes in nine standard fixed output-voltage versions: 1 V, 1.2 V, 1.8 V, 2.0 V, 2.5 V, 2.8 V, 3.0 V, 3.3 V, and 4.0 V. The 150/300 mA output current capability, combined with the low output-voltage capability, make the MCP1812 device 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.

The MCP1812 is stable with ceramic output capacitors that inherently provide lower output noise and reduce the size and cost of the entire regulator solution. Only 2.2 μF for MCP1812 of output capacitance is needed to assure the stability of the system with a low noise output.

The MCP1812 can be paired with other ultra-low current devices, such as Microchip's nanoWatt eXtreme Low Power (XLP) technology devices, for a complete ultra-low-power solution. These devices are ideal for any low-powered, long-life applications, including smart cards, energy harvesting, wearables, and hearing aids.

  • Ultra-low quiescent current: 250 nA (typical)
  • Ultra-low shutdown supply current:
    • 10 nA typical for MCP1811A/12A
    • 5 nA typical for MCP1811B/12B
  • Output current capability:
    • 300 mA for MCP1812X
  • Input voltage range: 1.8 V to 5.5 V
  • Standard output voltages (VR): 1 V, 1.2 V, 1.8 V, 2.0 V, 2.5 V, 2.8 V, 3.0 V, 3.3 V, and 4.0 V; for any other voltage options (between 1 V and 4 V)
  • Stable with ceramic output capacitor: 2.2 μF (MCP1812X)
  • Overcurrent protection
  • Output discharge (shutdown mode, SHDN = GND)
  • Available for the following packages:
    • 3-lead SOT-23
    • 3-lead SC70
    • 4-lead 1 mm x 1 mm UDFN
    • 5-lead SOT-23
    • 5-lead SC70
  • Energy harvesting
  • Long-life, battery-powered applications
  • Smart cards
  • Ultra-low consumption "green" products
  • Wearable electronics (smart watches, bracelets, headsets)
  • Medical devices (hearing aids)