MSL1064-TC LED Driver IC Equivalent & Substitute Parts

Part Overview

The MSL1064-TC is a 6-output LED driver IC with integrated DC-DC step-up (boost) regulator topology, designed for backlight applications. Manufactured by Microchip Technology, this device operates from a 4.75V to 36V supply and delivers 48V output at 30mA per channel with analog and PWM dimming capabilities. The MSL1064-TC is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity.

Substiute Parts

MSL1064-TC

Microchip TechnologyIn Stock: 1012MSL1064-TC Datasheet

Current PartRFQ

MP3366GC-P

Monolithic Power Systems Inc.In Stock: 1081MP3366GC-P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MSL1064-TC is determined by the following critical parameters:

• Topology: Step-up (boost) DC-DC regulator with 6 independent outputs
• Output Voltage: 48V nominal
• Dimming Control: Analog and PWM dimming capability
• Application: LED backlight driver
• Internal Switch: Integrated power switch required
• Package Compatibility: Surface mount technology

The MP3366GC-P qualifies as a functional substitute based on matching topology, output count, dimming control methods, and application category. While electrical specifications differ (supply voltage range, output current, and switching frequency), the core architecture and control interface remain compatible for backlight LED driver applications.

Parameter Comparison

Engineering Selection Recommendations

The MP3366GC-P is an active product from Monolithic Power Systems Inc. and serves as the primary substitute for the obsolete MSL1064-TC. Both devices are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Key considerations for selection:

• Supply Voltage Range: The MP3366GC-P operates from 3V minimum (lower than MSL1064-TC at 4.75V) and 25V maximum (lower than MSL1064-TC at 36V). Design input voltage must fall within 3V to 25V for MP3366GC-P compatibility.
• Output Current: The MP3366GC-P delivers 45mA per channel, exceeding the MSL1064-TC specification of 30mA, providing additional current margin.
• Output Voltage: The MP3366GC-P produces 45V nominal output versus 48V for the MSL1064-TC. Applications requiring exactly 48V output may require circuit adjustment.
• Package Footprint: The MP3366GC-P uses 18-WLCSP (1.35x2.55mm) versus the MSL1064-TC 24-TQFN (5x5mm). PCB layout redesign is required.
• Moisture Sensitivity: The MP3366GC-P has MSL rating of 1 (unlimited shelf life) compared to MSL1064-TC rating of 3 (168 hours), providing superior handling flexibility.
• Operating Temperature: The MP3366GC-P supports -40°C to 125°C junction temperature, exceeding the MSL1064-TC ambient range of -40°C to 85°C.

Frequently Asked Questions (FAQ)

Q: Can the MP3366GC-P directly replace the MSL1064-TC without circuit modification?

A: Direct pin-for-pin replacement is not possible due to different package types (24-TQFN versus 18-WLCSP) and pin counts. PCB layout redesign is required. However, the functional architecture and control interface are compatible for backlight LED driver applications.

Q: What is the impact of the 3V output voltage difference (45V vs 48V)?

A: The 3V difference represents a 6.25% reduction in output voltage. LED string designs must accommodate this lower voltage, or external voltage adjustment circuitry may be required depending on application tolerance.

Q: Is the MP3366GC-P suitable for the full input voltage range of the MSL1064-TC?

A: No. The MP3366GC-P maximum supply voltage is 25V, while the MSL1064-TC supports up to 36V. Applications requiring input voltages above 25V cannot use the MP3366GC-P as a substitute.

Q: What are the package size implications?

A: The MP3366GC-P 18-WLCSP package (1.35x2.55mm) is significantly smaller than the MSL1064-TC 24-TQFN package (5x5mm). This reduces PCB area but requires advanced assembly capabilities for ball grid array (BGA) soldering.

Q: Are both devices compliant with current regulatory standards?

A: Yes. Both the MSL1064-TC and MP3366GC-P are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the significance of the MSL rating difference?

A: The MP3366GC-P MSL rating of 1 (unlimited) provides superior moisture tolerance compared to the MSL1064-TC rating of 3 (168 hours). This reduces risk of moisture-induced failures during storage and handling.