RT9163-33GG Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The RT9163-33GG is an active linear voltage regulator IC manufactured by Richtek USA Inc., designed to deliver a fixed 3.3V output at 500mA in a surface-mount SOT-223 package. This component is classified as a Power Management PMIC and is currently in active product status with 22,600 units in stock. The RT9163-33GG serves applications requiring stable 3.3V regulation from input sources up to 15V with integrated over-current and over-temperature protection. Equivalent and substitute parts are identified based on matching output voltage, package type, mounting configuration, and regulatory compliance standards.

Substiute Parts

RT9163-33GG

Richtek USA Inc.In Stock: 22678RT9163-33GG Datasheet

Current PartRFQ

MCP1754ST-3302E/DB

Microchip TechnologyIn Stock: 21662MCP1754ST-3302E/DB Datasheet

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MIC5209-3.3YS-TR

Microchip TechnologyIn Stock: 18443MIC5209-3.3YS-TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RT9163-33GG are identified based on the following critical parameters:

• Fixed output voltage of 3.3V
• Surface-mount SOT-223 package configuration
• Positive output configuration with single regulator
• Operating temperature range of -40°C to 125°C
• Over-current and over-temperature protection features
• ROHS3 compliance and REACH unaffected status

The identified substitutes are MCP1754ST-3302E/DB and MIC5209-3.3YS-TR. Both parts maintain the 3.3V fixed output and SOT-223 package standard. Differences in output current capability, input voltage maximum ratings, and quiescent current specifications are documented in the parameter comparison table below.

Parameter Comparison

Engineering Selection Recommendations

MIC5209-3.3YS-TR provides the closest functional equivalence to the RT9163-33GG. Both parts deliver 500mA output current at 3.3V with identical operating temperature ranges and matching ROHS3 compliance. The MIC5209-3.3YS-TR includes additional reverse polarity protection and demonstrates superior power supply rejection ratio (PSRR) performance at 75dB. Moisture sensitivity level is equivalent at MSL 3. This part is suitable for direct substitution in applications where the RT9163-33GG is specified.

MCP1754ST-3302E/DB is a lower-current alternative rated for 150mA output. This part is appropriate only for applications with reduced current requirements below 150mA. The MCP1754ST-3302E/DB offers superior moisture handling with MSL 1 rating and lower quiescent current at 90 µA. Input voltage tolerance is marginally higher at 16V maximum. This part is not suitable for applications requiring the full 500mA output capability of the RT9163-33GG.

All substitute parts maintain active product status, ROHS3 compliance, and REACH unaffected regulatory standing.

Frequently Asked Questions (FAQ)

Q: Can MCP1754ST-3302E/DB replace RT9163-33GG in all applications?

A: No. The MCP1754ST-3302E/DB is rated for 150mA maximum output current, while the RT9163-33GG delivers 500mA. Substitution is limited to applications with output current requirements not exceeding 150mA.

Q: What is the primary advantage of MIC5209-3.3YS-TR over RT9163-33GG?

A: The MIC5209-3.3YS-TR provides identical 500mA output current and 3.3V regulation with additional reverse polarity protection and higher PSRR performance (75dB vs. unspecified). Both parts share equivalent moisture sensitivity and operating temperature specifications.

Q: Are all substitute parts available in the same SOT-223 package?

A: Yes. All parts use SOT-223 surface-mount packaging (TO-261-4, TO-261AA configuration), ensuring mechanical and electrical compatibility on PCB layouts designed for the RT9163-33GG.

Q: Do substitute parts meet the same regulatory requirements as RT9163-33GG?

A: Yes. Both MCP1754ST-3302E/DB and MIC5209-3.3YS-TR are ROHS3 compliant and REACH unaffected, matching the regulatory status of the RT9163-33GG.

Q: What is the difference in quiescent current between these parts?

A: The RT9163-33GG draws 8 mA quiescent current. The MCP1754ST-3302E/DB draws 90 µA, and the MIC5209-3.3YS-TR draws 170 µA. Lower quiescent current in substitute parts may reduce standby power consumption in battery-powered applications.

Q: Which substitute part has the best moisture handling characteristics?

A: The MCP1754ST-3302E/DB has MSL 1 (unlimited moisture exposure), compared to MSL 3 (168 hours) for both the RT9163-33GG and MIC5209-3.3YS-TR. MSL 1 rating provides extended shelf life and reduced moisture-related reflow failures.