RT9166A-33GGL Equivalent & Substitute Parts

Part Overview

The RT9166A-33GGL is a linear voltage regulator IC from Richtek USA Inc. designed for positive fixed 3.3V output applications with 600mA current capacity in a SOT-223 surface mount package. This active product is widely used in power management circuits requiring stable 3.3V regulation from input sources up to 5.5V. Substitute parts are identified when equivalent electrical performance, output specifications, and package compatibility are maintained across the same functional category.

Substiute Parts

RT9166A-33GGL

Richtek USA Inc.In Stock: 2213RT9166A-33GGL Datasheet

Current PartRFQ

AP7365-33ERG-13

Diodes IncorporatedIn Stock: 8142AP7365-33ERG-13 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RT9166A-33GGL are identified based on the following critical parameters that must remain equivalent:

• Fixed output voltage of 3.3V
• Output current capacity of 600mA minimum
• Surface mount SOT-223 package compatibility
• Input voltage rating of 5.5V or higher
• Operating temperature range of -40°C to 85°C or wider
• Over current and over temperature protection features
• Active product status with ROHS3 compliance

The AP7365-33ERG-13 from Diodes Incorporated meets these substitution criteria while maintaining functional equivalence in linear voltage regulation applications.

Parameter Comparison

Engineering Selection Recommendations

Both the RT9166A-33GGL and AP7365-33ERG-13 are active products with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement. The AP7365-33ERG-13 demonstrates improved performance characteristics including lower dropout voltage and reduced quiescent current, while maintaining identical output voltage and current specifications. Both devices support the same operating temperature range and protection feature set required for 3.3V power management applications. Package compatibility is maintained between SOT-223 and SOT-223R variants for surface mount assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the AP7365-33ERG-13 directly replace the RT9166A-33GGL in existing designs?

A: Yes, the AP7365-33ERG-13 is functionally equivalent for 3.3V 600mA linear regulation applications. Both devices share identical output voltage, output current, operating temperature range, and protection features. The SOT-223 and SOT-223R package variants are compatible with standard surface mount assembly equipment.

Q: What are the key differences between these two regulators?

A: The AP7365-33ERG-13 offers superior performance with lower dropout voltage (0.4V vs 0.58V), reduced quiescent current (80 µA vs 300 µA), higher PSRR (65dB vs 55dB), and improved moisture sensitivity rating (MSL 1 vs MSL 3). Input voltage rating is also higher at 6V versus 5.5V.

Q: Are there any package considerations when substituting these parts?

A: Both parts use SOT-223 surface mount packages. The RT9166A-33GGL uses standard SOT-223, while the AP7365-33ERG-13 uses SOT-223R variant. These packages are mechanically and electrically compatible for PCB assembly and soldering processes.

Q: Do both parts meet current compliance requirements?

A: Yes, both the RT9166A-33GGL and AP7365-33ERG-13 are ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic component use in regulated markets.

Q: Which regulator should be selected for new designs?

A: Selection should be based on specific application requirements. The AP7365-33ERG-13 is preferred when lower power consumption, reduced thermal dissipation, or higher input voltage tolerance are design priorities. The RT9166A-33GGL remains suitable for applications where the specified performance characteristics are sufficient.