MSL3085BT-R LED Driver IC Equivalent & Substitute Parts

Part Overview

The MSL3085BT-R is an 8-output linear PWM LED driver IC manufactured by Microchip Technology, designed for backlight applications in automotive-grade environments. This device operates within a 10.8V to 13.2V supply voltage range and features PWM dimming control in a 40-TQFN (6x6) surface mount package. The MSL3085BT-R is currently classified as obsolete, making identification of functionally compatible substitute parts essential for ongoing design support and production continuity.

Substiute Parts

MSL3085BT-R

Microchip TechnologyIn Stock: 824MSL3085BT-R Datasheet

Current PartRFQ

ATMSL3085BT

Microchip TechnologyIn Stock: 989ATMSL3085BT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MSL3085BT-R must satisfy the following critical parameters to ensure functional compatibility:

• Package Compatibility: 40-TQFN (6x6) surface mount package with exposed pad
• Supply Voltage Range: 10.8V to 13.2V operation
• Output Configuration: 8-output architecture
• Dimming Method: PWM control capability
• Temperature Rating: -40°C to 105°C operating range
• Compliance Standards: ROHS3 compliance and automotive-grade qualification
• Moisture Sensitivity: MSL 3 (168 Hours) classification

The ATMSL3085BT substitute part meets all these criteria while offering an active product status and enhanced topology flexibility through its DC DC controller architecture with Step-Up (Boost) capability.

Parameter Comparison

Engineering Selection Recommendations

The ATMSL3085BT is the primary substitute for the obsolete MSL3085BT-R. Both devices are manufactured by Microchip Technology and share identical electrical specifications across supply voltage, output configuration, dimming control, operating temperature range, and package format. Both parts maintain ROHS3 compliance and MSL 3 moisture sensitivity classification, ensuring compatibility with existing supply chain and assembly processes.

The key distinction is product status: the MSL3085BT-R is obsolete, while the ATMSL3085BT maintains active production status. The ATMSL3085BT employs a DC DC controller topology with Step-Up (Boost) capability, compared to the linear topology of the original part. This architectural difference does not affect pin compatibility or package requirements but may provide enhanced efficiency characteristics in specific application configurations.

Selection of the ATMSL3085BT is supported by equivalent compliance certifications, identical thermal ratings, and maintained automotive-grade qualification across the full operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the ATMSL3085BT directly replace the MSL3085BT-R in existing designs?

A: Yes. Both parts share identical package format (40-TQFN 6x6), supply voltage range (10.8V–13.2V), output count (8), dimming method (PWM), and operating temperature specifications (-40°C to 105°C). Pin compatibility and electrical interface requirements are equivalent.

Q: What is the primary reason for substitution?

A: The MSL3085BT-R is classified as obsolete. The ATMSL3085BT provides functional equivalence with active product status, ensuring long-term availability and supply chain continuity.

Q: Are there compliance or certification differences between these parts?

A: No. Both parts maintain ROHS3 compliance, MSL 3 (168 Hours) moisture sensitivity classification, and automotive-grade qualification. REACH and ECCN classifications are identical.

Q: How do the linear and DC DC controller topologies affect application performance?

A: Topology differences relate to internal circuit architecture. Both parts deliver 8-channel PWM dimming control within the specified 10.8V–13.2V supply range. Application-specific performance depends on circuit design and load characteristics, not topology classification alone.

Q: Is the 40-TQFN (6x6) package format standard across both parts?

A: Yes. Both the MSL3085BT-R and ATMSL3085BT use the 40-WFQFN Exposed Pad package with identical 6x6mm footprint, ensuring PCB layout compatibility without redesign.

Q: What is the inventory status for these parts?

A: The MSL3085BT-R has 742 pieces in stock (new original). The ATMSL3085BT has 914 pieces in stock (new original), providing robust availability for production requirements.