RT9166-12GVL Linear Voltage Regulator

Part Overview

The RT9166-12GVL is an active linear voltage regulator IC manufactured by Richtek USA Inc., designed for positive fixed output applications. This Surface Mount device delivers 1.2V at 300mA output current in a compact SOT-23-3L package. The part is currently in active production status with 20,299 units in stock inventory. Alternative components may be required due to supply constraints, design optimization, or application-specific performance requirements.

Substiute Parts

RT9166-12GVL

Richtek USA Inc.In Stock: 20333RT9166-12GVL Datasheet

Current PartRFQ

MCP1700T-1202E/TT

Microchip TechnologyIn Stock: 6376MCP1700T-1202E/TT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RT9166-12GVL is determined by the following critical parameters:

• Output Voltage: Must be fixed at 1.2V
• Package Type: Must be SOT-23-3 (Surface Mount)
• Output Configuration: Must be Positive Fixed output
• Regulatory Compliance: Must maintain ROHS3 compliance

The MCP1700T-1202E/TT qualifies as a substitute based on matching output voltage (1.2V fixed), identical package type (SOT-23-3), and equivalent regulatory compliance (ROHS3). Differences in output current rating, dropout voltage, and quiescent current specifications must be evaluated against application requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the RT9166-12GVL and MCP1700T-1202E/TT maintain active production status and ROHS3 compliance. The MCP1700T-1202E/TT provides extended operating temperature range (-40°C ~ 125°C versus -40°C ~ 85°C) and includes Short Circuit protection in addition to Over Current and Over Temperature protection. The MCP1700T-1202E/TT features significantly lower quiescent current (4 µA versus 300 µA), beneficial for battery-powered or low-power standby applications. Selection between these parts depends on application current requirements, as the MCP1700T-1202E/TT is rated for 200mA maximum output current compared to the RT9166-12GVL's 300mA rating.

Frequently Asked Questions (FAQ)

Q: Can the MCP1700T-1202E/TT directly replace the RT9166-12GVL in all applications?

A: Direct replacement is possible only when application output current requirements do not exceed 200mA. The MCP1700T-1202E/TT is rated for 200mA maximum output current, while the RT9166-12GVL supports 300mA. Both devices provide identical 1.2V fixed output voltage and use the same SOT-23-3 package.

Q: What are the key differences in electrical performance?

A: The MCP1700T-1202E/TT offers lower quiescent current (4 µA versus 300 µA), higher maximum input voltage (6V versus 5.5V), and extended operating temperature range (-40°C ~ 125°C versus -40°C ~ 85°C). The RT9166-12GVL provides lower dropout voltage (0.23V @ 300mA versus 0.35V @ 200mA) and higher PSRR (55dB at 1kHz versus 44dB at 100Hz).

Q: Are both parts suitable for high-temperature applications?

A: The MCP1700T-1202E/TT supports operation up to 125°C, making it suitable for extended temperature range applications. The RT9166-12GVL is rated to 85°C maximum operating temperature.

Q: Do package dimensions differ between these parts?

A: Both parts use the SOT-23-3 package type. Physical dimensions and pin configurations are equivalent, allowing direct PCB layout compatibility.

Q: Which part is better for low-power applications?

A: The MCP1700T-1202E/TT is preferable for low-power or battery-powered designs due to its significantly lower quiescent current consumption (4 µA versus 300 µA).