RT9161-15GV Equivalent & Substitute Parts

Part Overview

The RT9161-15GV is a linear voltage regulator IC manufactured by Richtek USA Inc., designed to deliver a fixed 1.5V output at 300mA in a compact SOT-23-3 surface mount package. This device is classified as an active product and is widely used in power management applications requiring low-voltage regulation with integrated over-current and over-temperature protection. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Substiute Parts

RT9161-15GV

Richtek USA Inc.In Stock: 791RT9161-15GV Datasheet

Current PartRFQ

AP7333-15SAG-7

Diodes IncorporatedIn Stock: 1676AP7333-15SAG-7 Datasheet

SimilarRFQ

MCP1703T-1502E/CB

Microchip TechnologyIn Stock: 2155MCP1703T-1502E/CB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RT9161-15GV are qualified based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

• Fixed output voltage of 1.5V
• Output current capability of 200mA or greater
• Surface mount package compatibility (SOT-23-3 or equivalent TO-236-3)
• Positive output configuration
• Over-current and over-temperature protection features
• Active product status
• ROHS3 compliance

Secondary Compatibility Factors:

• Maximum input voltage rating (minimum 12V required)
• Operating temperature range (-40°C to 125°C or equivalent)
• Moisture sensitivity level and storage conditions

The identified substitute parts meet these criteria while maintaining electrical and mechanical compatibility with the RT9161-15GV in typical application circuits.

Parameter Comparison

Engineering Selection Recommendations

RT9161-15GV (Primary Part): All three parts are active products with ROHS3 compliance and REACH unaffected status. The RT9161-15GV supports a maximum input voltage of 12V and delivers 300mA output current with a specified dropout voltage of 0.6V at full load.

AP7333-15SAG-7 (Diodes Incorporated): This substitute provides 300mA output current matching the primary part. However, the maximum input voltage is limited to 6V, which is lower than the RT9161-15GV specification of 12V. This part is suitable for applications with input voltages not exceeding 6V. The MSL rating of 1 (Unlimited) provides superior moisture protection compared to the primary part's MSL 3 rating.

MCP1703T-1502E/CB (Microchip Technology): This substitute supports a maximum input voltage of 16V, exceeding the primary part's 12V specification. However, the output current is limited to 200mA, which is lower than the RT9161-15GV's 300mA rating. This part is suitable for applications requiring higher input voltage tolerance but with output current requirements of 200mA or less. The MSL rating of 1 (Unlimited) provides superior moisture protection.

Frequently Asked Questions (FAQ)

Q: Can the AP7333-15SAG-7 be used as a direct replacement for the RT9161-15GV?

A: The AP7333-15SAG-7 is mechanically and electrically compatible for applications where the input voltage does not exceed 6V. If your circuit requires input voltages between 6V and 12V, this substitute is not suitable. Both parts deliver 300mA output current and share the same SOT-23-3 package footprint.

Q: What are the limitations of the MCP1703T-1502E/CB as a substitute?

A: The MCP1703T-1502E/CB is limited to 200mA output current compared to the RT9161-15GV's 300mA capability. This part is suitable only for applications requiring 200mA or less. The higher maximum input voltage rating of 16V makes it suitable for circuits with higher input voltage requirements.

Q: Are all three parts pin-compatible?

A: All three parts use the SOT-23-3 package (TO-236-3, SC-59), which provides mechanical compatibility. Pin configuration compatibility must be verified against the specific application circuit design, as linear regulators in this package typically follow standard pinout conventions (Input, Ground, Output).

Q: What is the significance of the Moisture Sensitivity Level (MSL) difference?

A: The RT9161-15GV has an MSL rating of 3 with a 168-hour limit, requiring controlled storage and handling conditions. The AP7333-15SAG-7 and MCP1703T-1502E/CB both have MSL 1 (Unlimited) ratings, allowing indefinite storage without moisture absorption concerns. This affects supply chain handling and shelf-life management.

Q: Which substitute should I select if my application requires 300mA output current?

A: Only the AP7333-15SAG-7 matches the 300mA output current specification. Selection between the primary part and this substitute depends on your maximum input voltage requirement. If your input voltage exceeds 6V, the RT9161-15GV or alternative sources must be used.

Q: Are there any temperature range considerations for substitution?

A: The RT9161-15GV and MCP1703T-1502E/CB both support the full -40°C to 125°C operating temperature range. The AP7333-15SAG-7 is limited to -40°C to 85°C. For applications requiring operation above 85°C, this substitute is not suitable.