MCP1811A/11B/12A/12B
Ultra-Low Quiescent Current LDO Regulator
for Long-Life Battery-Powered Applications
Features
• 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:
- 150 mA for MCP1811X (Note 1)
- 300 mA for MCP1812X
• Input Voltage Range: 1.8V to 5.5V
• Standard Output Voltages (VR): 1V, 1.2V, 1.8V, 2.0V,
2.5V, 2.8V, 3.0V, 3.3V and 4.0V; for any other voltage
options (between 1V to 4V), please contact your local
sales office
• Stable with Ceramic Output Capacitor:
1.0 μF (MCP1811X) and 2.2 μF (MCP1812X)
• Overcurrent Protection
• Output Discharge (Shutdown mode,
SHDN = GND) MCP1811A/12A
• Available for the Following Packages:
- 3-Lead SOT-23
- 3-Lead SC70
- 4-Lead 1 x 1 mm UDFN
- 5-Lead SOT-23
- 5-Lead SC70
Applications
• Energy Harvesting
• Long-Life, Battery-Powered Applications
• Smart Cards
• Ultra-Low Consumption “Green” Products
• Wearable Electronics (smart watches, bracelets,
headsets)
• Medical Devices (hearing aids)
Description
The MCP1811X/12X devices are 150 mA (MCP1811X)
and 300 mA (MCP1812X) 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 MCP1811X/12X family comes in nine standard
fixed output voltage versions: 1V, 1.2V, 1.8V, 2.0V,
2.5V, 2.8V, 3.0V, 3.3V and 4.0V.
The 150/300 mA output current capability, combined
with the low output voltage capability, make the
MCP1811X/12X 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 MCP1811X/12X devices are stable with ceramic
output capacitors that inherently provide lower output
noise, and reduce the size and cost of the entire
regulator solution. Only 1 μF (2.2 μF for MCP1812X) of
output capacitance is needed to assure the stability of
the system with a low noise output.
The MCP1811X/12X family can be paired with other
ultra-low current devices, such as Microchip’s eXtreme
Low-Power (XLP) technology devices, for a complete
ultra-low power solution.
Note 1: The MCP1811X and MCP1812X desig-
nations refer to MCP1811A/11B and
MCP1812A/12B, respectively.
2018-2019 Microchip Technology Inc.
DS20006088B-page 1
