MCP1801T-3302I/OT

Product Overview

The MCP1801T-3302I/OT from Microchip Technology is a single-output positive fixed linear voltage regulator in a surface-mount SOT-23-5 package. It provides a 3.3 V output from an input voltage up to 10 V and can deliver up to 150 mA. The device includes an enable control feature, over-current protection, and a specified dropout of 0.25 V at 100 mA. Its 50 µA quiescent current and 70 dB power-supply rejection at 10 kHz support compact regulated-rail designs where board area and steady-state current draw are important. The specified operating temperature range is -40°C to 85°C.

Key Features

• Positive fixed 3.3 V output with a maximum input voltage of 10 V.
• Single regulator delivering up to 150 mA output current.
• Voltage dropout specified at 0.25 V at 100 mA.
• Quiescent current of 50 µA.
• Power-supply rejection ratio of 70 dB at 10 kHz.
• Enable control feature and over-current protection.
• Surface-mount SOT-23-5 package; package/case designation SC-74A, SOT-753.
• Operating temperature range of -40°C to 85°C.

Applications

• 3.3 V supply rail for low-current digital logic or sensor subsystems.
• Enable-controlled standby or power-sequenced 3.3 V rail.
• Regulated rail in mixed-signal or analog subsystems where input-supply rejection is useful.

Design & Procurement Notes

Designers should confirm that the load requires a fixed 3.3 V output and that the input voltage remains at or below 10 V. The 0.25 V dropout at 100 mA should be evaluated against worst-case load current, input-supply tolerance, and transient headroom. The enable control can be used for output sequencing or standby control, while over-current protection should be considered together with load fault behavior. Because the regulator is limited to 150 mA, output power dissipation from the input-to-output voltage difference should be reviewed with surface-mount thermal constraints. The -40°C to 85°C operating range should be checked against the final assembly environment.