LNK305G-TL Equivalent & Substitute Parts

Part Overview

The LNK305G-TL is an offline switch IC manufactured by Power Integrations, part of the LinkSwitch®-TN series. This device functions as a converter for offline buck, buck-boost, and flyback topologies operating at 66kHz with an 8-SMD package configuration. The LNK305G-TL is classified as obsolete product status. Due to its obsolescence, identifying equivalent and substitute parts from the active LinkSwitch®-TN product line is necessary to maintain design continuity and ensure component availability for new production runs and legacy system support.

Substiute Parts

LNK305G-TL

Power IntegrationsIn Stock: 884LNK305G-TL Datasheet

Current PartRFQ

LNK305GN-TL

Power IntegrationsIn Stock: 30857LNK305GN-TL Datasheet

DirectRFQ

LNK302GN-TL

Power IntegrationsIn Stock: 17316LNK302GN-TL Datasheet

Parametric EquivalentRFQ

LNK304GN-TL

Power IntegrationsIn Stock: 55189LNK304GN-TL Datasheet

Parametric EquivalentRFQ

LNK306GN-TL

Power IntegrationsIn Stock: 18298LNK306GN-TL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LNK305G-TL are selected based on strict electrical and mechanical parameter equivalence within the LinkSwitch®-TN series. The substitution criteria are:

Critical Matching Parameters:

• Topology: Buck, Buck-Boost, Flyback
• Voltage - Breakdown: 700V
• Frequency - Switching: 66kHz
• Duty Cycle: 69%
• Operating Temperature Range: -40°C ~ 150°C (TJ)
• Package / Case: 8-SMD (7 Leads), Gull Wing
• Supplier Device Package: SMD-8B
• Mounting Type: Surface Mount
• Fault Protection: Current Limiting, Open Loop, Over Temperature, Short Circuit
• Output Isolation: Non-Isolated
• Internal Switch(s): Yes

All substitute parts listed maintain identical electrical specifications and mechanical packaging. The primary distinction between the main part (LNK305G-TL) and substitute parts is product status and compliance certification. Substitute parts are selected from active product status devices within the LinkSwitch®-TN family that share the complete parameter set.

Parameter Comparison

Engineering Selection Recommendations

Direct Manufacturer Substitute - LNK305GN-TL: The LNK305GN-TL is the direct active-status equivalent of the obsolete LNK305G-TL. This part maintains identical electrical and mechanical specifications while offering active product status and RoHS compliance. The LNK305GN-TL is the primary recommended substitute for direct replacement applications. Inventory availability is 30,786 pieces.

Parametric Equivalents - LNK302GN-TL, LNK304GN-TL, LNK306GN-TL: These three parts are parametric equivalents within the LinkSwitch®-TN series, sharing all critical electrical parameters and mechanical packaging with the LNK305G-TL. All three devices are active product status with RoHS compliance. Selection among these parametric equivalents depends on application-specific requirements not defined by the provided parameters. Inventory availability: LNK302GN-TL (17,300 pieces), LNK304GN-TL (55,100 pieces), LNK306GN-TL (18,198 pieces).

Compliance Considerations: All substitute parts are RoHS compliant, whereas the original LNK305G-TL is RoHS non-compliant. Substitute parts carry MSL rating of 4 (72 Hours) compared to the original MSL rating of 1 (Unlimited). These compliance differences reflect the transition from obsolete to active product status within the manufacturer's current product line.

Frequently Asked Questions (FAQ)

Q: Can LNK305GN-TL directly replace LNK305G-TL in existing designs? A: Yes. The LNK305GN-TL maintains identical electrical specifications (700V breakdown, 66kHz switching frequency, 69% duty cycle) and mechanical packaging (8-SMD, Gull Wing). Both devices support buck, buck-boost, and flyback topologies with identical fault protection features and operating temperature range (-40°C to 150°C).

Q: What is the difference between LNK305GN-TL and the parametric equivalents (LNK302GN-TL, LNK304GN-TL, LNK306GN-TL)? A: All four parts share identical electrical and mechanical parameters as specified in this reference. The base product numbers differ (305, 302, 304, 306), but this distinction is not defined by the provided parameter set. Selection among these parts requires application-specific criteria beyond the scope of this electrical and mechanical equivalence analysis.

Q: Are there packaging differences between substitute parts? A: All substitute parts use identical packaging: 8-SMD (7 Leads), Gull Wing configuration with SMD-8B supplier device package. All are surface mount devices with no packaging variations.

Q: What is the impact of MSL rating differences? A: The original LNK305G-TL carries MSL 1 (Unlimited moisture sensitivity), while all substitute parts carry MSL 4 (72 Hours). MSL 4 requires storage in controlled humidity conditions (not exceeding 60% relative humidity) and limits shelf life to 72 hours after opening the moisture barrier bag. This affects component handling and storage procedures.

Q: Are all substitute parts RoHS compliant? A: Yes. All four substitute parts (LNK305GN-TL, LNK302GN-TL, LNK304GN-TL, LNK306GN-TL) are RoHS compliant. The original LNK305G-TL is RoHS non-compliant, reflecting its obsolete status.

Q: Which substitute part has the highest inventory availability? A: LNK304GN-TL has the highest inventory with 55,100 pieces in stock, followed by LNK305GN-TL (30,786 pieces), LNK306GN-TL (18,198 pieces), and LNK302GN-TL (17,300 pieces).