MCP1811BT-025/LB

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The MCP1811BT-025/LB is a fixed-output Low Dropout (LDO) linear regulator from the Microchip MCP1811A/11B/12A/12B family. It provides a nominal output voltage of 2.5 V with a maximum continuous output current capability of 150 mA. The device operates within an input voltage range of 1.8 V to 5.5 V and maintains an ultra-low quiescent current of 250 nA during operation. In shutdown mode, it draws a typical supply current of 5 nA. The component is housed in a 3-Lead SOT-23 package and is designed for stable performance with ceramic output capacitors.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Ultra-low quiescent current consumption of 250 nA during active operation
• Ultra-low shutdown supply current of 5 nA typical when SHDN is low
• Stable with small ceramic output capacitors requiring only 1.0 µF
• Integrated overcurrent protection for load safety

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Energy harvesting systems
• Long-life battery-powered applications
• Smart cards
• Wearable electronics such as smart watches and headsets
• Medical devices including hearing aids

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix 'LB' against official documentation to confirm the 3-Lead SOT-23 package configuration. Confirm that the 'B' designation indicates the absence of an internal output discharge feature, which differs from the 'A' variant. Ensure compatibility with the required 1.0 µF minimum ceramic output capacitance for stability.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component for designs requiring high-current delivery at low voltages while maintaining minimal power drain during sleep periods. The 150 mA output current capability supports moderate load demands. Verify that the application does not require an automatic output discharge function upon shutdown, as this variant lacks that feature compared to the 'A' series.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the MCP1811X/12X family of ultra-low quiescent current LDO regulators. The family includes variants with different output currents (150 mA vs 300 mA) and shutdown features. The MCP1811X designation specifically refers to the 150 mA output current class within the broader product line.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

MCP1811AT-025/LB: Includes output discharge feature.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

Does the MCP1811BT-025/LB include an output discharge switch?

No, the 'B' designation indicates that this device does not have an internal output discharge switch. This feature is available in the 'A' variant.

What is the minimum output capacitance required for stability?

The device requires a minimum output capacitance of 1.0 µF. It is stable with ceramic capacitors of this value.