RT7736LGE Equivalent & Substitute Parts

Part Overview

The RT7736LGE is an offline switching flyback converter IC manufactured by Richtek USA Inc., designed for isolated power management applications. This PMIC operates at 65kHz switching frequency with integrated current limiting, overload, overvoltage, and short circuit protection. The device is actively produced and widely stocked, with 20,030 units available in inventory. Alternative part numbers exist within the same product family to accommodate different packaging and distribution requirements while maintaining identical electrical and mechanical specifications.

Substiute Parts

RT7736LGE

Richtek USA Inc.In Stock: 20045RT7736LGE Datasheet

Current PartRFQ

RT7736GGE

Richtek USA Inc.In Stock: 4206RT7736GGE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RT7736LGE is determined by strict equivalence across the following critical parameters:

• Topology: Flyback converter architecture
• Output Isolation: Isolated configuration
• Voltage Supply Range: 12V ~ 25V input
• Startup Voltage: 14.5V threshold
• Switching Frequency: 65kHz operation
• Duty Cycle: 75% maximum
• Fault Protection: Current limiting, overload, overvoltage, and short circuit protection
• Package: SOT-23-6 surface mount
• Operating Temperature: -40°C ~ 85°C
• Compliance: ROHS3 and REACH standards

The RT7736GGE meets all these criteria and is therefore a direct parametric equivalent. The primary difference between these parts is packaging format and distribution channel, not electrical or mechanical performance.

Parameter Comparison

Engineering Selection Recommendations

Both RT7736LGE and RT7736GGE are active production parts from Richtek USA Inc. with identical electrical specifications and compliance certifications. Selection between these parts should be based on:

Packaging Format: RT7736LGE is supplied in standard packaging, while RT7736GGE is available in Cut Tape (CT) and Digi-Reel® formats. Choose based on procurement volume and assembly line requirements.

Inventory Availability: RT7736LGE has 20,030 units in stock; RT7736GGE has 4,150 units available. For high-volume production, verify lead times and allocation with your distributor.

Regulatory Compliance: Both parts meet ROHS3 and REACH requirements, suitable for applications requiring environmental compliance certification.

Moisture Sensitivity: Both parts carry MSL-3 rating (168 hours), requiring standard moisture control during storage and handling per IPC standards.

Frequently Asked Questions (FAQ)

Q: Can RT7736GGE directly replace RT7736LGE in production? A: Yes. Both parts are parametrically identical across all electrical and mechanical specifications. The difference is packaging format and distribution channel only. No circuit redesign or PCB layout modification is required.

Q: What is the difference between the packaging designations? A: RT7736LGE uses standard packaging, while RT7736GGE is supplied in Cut Tape (CT) and Digi-Reel® formats. These are distribution and handling formats; the IC itself is identical.

Q: Are there any thermal or performance differences? A: No. Both parts operate at identical switching frequency (65kHz), duty cycle (75%), voltage supply range (12V ~ 25V), and temperature range (-40°C ~ 85°C). Thermal performance is equivalent.

Q: Do both parts require the same PCB footprint? A: Yes. Both use SOT-23-6 surface mount package with identical pin configuration and spacing. PCB layouts are interchangeable.

Q: What is the MSL-3 rating and how does it affect handling? A: MSL-3 indicates the part can be exposed to moisture for up to 168 hours at specified humidity levels before soldering. Store in dry conditions and follow standard moisture control procedures per IPC-A-610 guidelines.

Q: Are both parts suitable for isolated power supply applications? A: Yes. Both feature isolated output configuration with integrated flyback topology, designed for offline switching power supply applications requiring galvanic isolation.

Q: What protection features are included in both parts? A: Both RT7736LGE and RT7736GGE include current limiting, overload protection, overvoltage protection, and short circuit protection integrated into the IC.