RT9165GX Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The RT9165GX is an active linear voltage regulator IC manufactured by Richtek USA Inc., designed for positive fixed 5V output applications with 150mA current capacity. This Surface Mount device in SOT-89-3 package is classified as Power Management (PMIC) and maintains Active product status. Alternative equivalent parts may be required due to inventory constraints, supply chain considerations, or specific application requirements where substitute devices meet identical electrical and mechanical specifications.

Substiute Parts

RT9165GX

Richtek USA Inc.In Stock: 2905RT9165GX Datasheet

Current PartRFQ

MCP1754ST-5002E/MB

Microchip TechnologyIn Stock: 4566MCP1754ST-5002E/MB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RT9165GX are identified based on strict parametric equivalence across the following critical specifications:

• Output voltage configuration: Positive fixed 5V output
• Output current capacity: 150mA minimum
• Maximum input voltage: 16V or greater
• Package form factor: SOT-89-3 (TO-243AA case)
• Surface Mount technology compatibility
• Protection features: Over Current and Over Temperature protection
• Operating temperature range: -40°C to 125°C minimum
• RoHS3 compliance and REACH unaffected status

The MCP1754ST-5002E/MB meets all mandatory substitution criteria and is classified as a parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the RT9165GX and MCP1754ST-5002E/MB are Active product status devices with full ROHS3 compliance and REACH unaffected certification. Selection between these parts should be based on:

• Inventory availability and lead time requirements
• Packaging format preference (Cut Tape vs. standard packaging)
• Supplier qualification and procurement procedures
• Cost considerations within approved component lists

The MCP1754ST-5002E/MB offers enhanced quiescent current performance (90 µA vs. 8 mA) and lower dropout voltage (0.5V @ 150mA), which may provide advantages in power-sensitive or low-input-voltage applications, though both devices meet the core functional requirements for 5V 150mA linear regulation.

Frequently Asked Questions (FAQ)

Q: Can MCP1754ST-5002E/MB be used as a direct replacement for RT9165GX?

A: Yes. Both devices share identical output voltage (5V fixed), output current (150mA), input voltage rating (16V max), package form factor (SOT-89-3), and protection features. Pin-to-pin compatibility and electrical performance meet substitution requirements.

Q: Are there differences in quiescent current between these parts?

A: The MCP1754ST-5002E/MB operates at 90 µA quiescent current compared to the RT9165GX at 8 mA. This difference is provided for reference but does not affect substitution eligibility for standard 5V 150mA regulator applications.

Q: What is the significance of the dropout voltage specification?

A: The MCP1754ST-5002E/MB specifies 0.5V dropout at 150mA output. The RT9165GX dropout voltage is not specified in the provided data. Both devices operate within the 16V maximum input specification and are suitable for the same input voltage range applications.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both RT9165GX and MCP1754ST-5002E/MB are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Does packaging format affect substitution?

A: Both parts use identical SOT-89-3 package form factor (TO-243AA case). The MCP1754ST-5002E/MB is available in Cut Tape and Digi-Reel packaging formats. Packaging format does not affect electrical compatibility but may influence procurement and handling procedures.