RT9741CGV Equivalent & Substitute Parts

Part Overview

The RT9741CGV is a Power Switch/Driver IC designed for 1:1 N-Channel high-side switching applications with a maximum output current of 700mA. This component operates across a load voltage range of 2.7V to 5.5V and features integrated fault protection including current limiting, over-temperature protection, reverse current blocking, and UVLO (Under-Voltage Lock-Out). The RT9741CGV is classified as Obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

RT9741CGV

Richtek USA Inc.In Stock: 1770RT9741CGV Datasheet

Current PartRFQ

RT9742LNGV

Richtek USA Inc.In Stock: 860333RT9742LNGV Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RT9741CGV is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Criteria:

• Switch Type: USB Switch
• Output Configuration: High Side, N-Channel
• Number of Outputs: 1
• Ratio - Input:Output: 1:1
• Interface: On/Off
• Input Type: Non-Inverting
• Package / Case: TO-236-3, SC-59, SOT-23-3
• Mounting Type: Surface Mount
• Fault Protection: Current Limiting (Fixed), Over Temperature, Reverse Current, UVLO
• Operating Temperature Range: -40°C ~ 85°C (TA)

Allowable Parameter Variations:

• Voltage - Load: Equal to or greater than the original specification (2.7V ~ 5.5V minimum)
• Current - Output (Max): Equal to or greater than 700mA
• Rds On (Typ): Equal to or lower than 120mOhm (lower resistance is acceptable)

The RT9742LNGV meets all critical substitution criteria and exceeds performance specifications in current capacity and on-resistance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The RT9742LNGV is the direct substitute for the obsolete RT9741CGV. Selection is based on the following engineering factors:

Product Status: The RT9741CGV is classified as Obsolete, while the RT9742LNGV maintains Active status with substantial inventory availability (860,300 pcs), ensuring long-term supply chain reliability and design continuity.

Compliance & Certifications: Both components maintain ROHS3 compliance and identical MSL ratings (3, 168 Hours), ensuring equivalent environmental and handling requirements. The RT9742LNGV carries EAR99 classification with standard HTSUS coding, confirming regulatory alignment.

Performance Enhancement: The RT9742LNGV provides superior electrical performance through increased maximum output current (1A versus 700mA) and reduced on-resistance (70mOhm versus 120mOhm), delivering improved efficiency and thermal characteristics without requiring circuit redesign.

Electrical Compatibility: Extended load voltage range (2.7V ~ 6V) and identical fault protection architecture ensure drop-in compatibility within existing PCB layouts and thermal management designs.

Frequently Asked Questions (FAQ)

Q: Can the RT9742LNGV directly replace the RT9741CGV without PCB modifications?

A: Yes. Both components share identical package specifications (SOT-23-3), pinout configuration, and fault protection features. No PCB layout changes are required for substitution.

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

A: The RT9742LNGV provides higher current capacity (1A versus 700mA), lower on-resistance (70mOhm versus 120mOhm), and extended load voltage range (2.7V ~ 6V versus 2.7V ~ 5.5V). The RT9742LNGV maintains Active product status, ensuring ongoing availability.

Q: Are there any thermal or power dissipation considerations when substituting?

A: The lower on-resistance of the RT9742LNGV (70mOhm) results in reduced power dissipation compared to the RT9741CGV (120mOhm) at equivalent current levels, providing improved thermal performance.

Q: Does the RT9742LNGV support the same operating temperature range?

A: Yes. Both components operate across -40°C to 85°C (TA), maintaining identical thermal specifications.

Q: Are both components RoHS compliant?

A: Yes. Both the RT9741CGV and RT9742LNGV are ROHS3 compliant with identical MSL ratings (3, 168 Hours).

Q: What is the primary reason for substitution?

A: The RT9741CGV is Obsolete. The RT9742LNGV is the active equivalent offering superior performance specifications and guaranteed long-term supply availability.