MP3373GY-Z LED Driver Controller Equivalent & Substitute Parts

Part Overview

The MP3373GY-Z is an active LED driver controller IC manufactured by Monolithic Power Systems Inc., classified as a Power Management PMIC. This 28-SOIC surface mount device functions as an 8-output DC-DC step-up (boost) controller with PWM dimming capability, designed for backlight applications. The part operates across a 9V to 40V supply voltage range at a switching frequency of 785kHz and maintains active product status with full RoHS3 compliance.

Substitute parts are identified when equivalent functional performance can be achieved through alternative manufacturers while maintaining core electrical and mechanical compatibility within the allowed parameter tolerances for LED driver controller applications.

Substiute Parts

MP3373GY-Z

Monolithic Power Systems Inc.In Stock: 784MP3373GY-Z Datasheet

Current PartRFQ

LT3760EFE#PBF

Analog Devices Inc.In Stock: 2195LT3760EFE#PBF Datasheet

MFR RecommendedRFQ

LT3760IFE#PBF

Analog Devices Inc.In Stock: 2525LT3760IFE#PBF Datasheet

MFR RecommendedRFQ

TPS61199PWP

Texas InstrumentsIn Stock: 68162TPS61199PWP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MP3373GY-Z are qualified based on the following core parameters that determine functional equivalence:

• Topology: Step-Up (Boost) DC-DC controller architecture
• Output Count: 8 outputs for LED driver applications
• Dimming Capability: PWM dimming support
• Supply Voltage Range: Overlap within 9V to 40V operating window
• Application: Backlight LED driver functionality
• Mounting: Surface mount configuration
• Compliance: RoHS3 and REACH compliance status

The three identified substitutes (LT3760EFE#PBF, LT3760IFE#PBF, and TPS61199PWP) meet these core functional requirements. Variations in package type, frequency range, current output per channel, and MSL rating represent acceptable parameter differences within the LED driver controller category.

Parameter Comparison

Engineering Selection Recommendations

All four parts maintain active product status and full RoHS3 compliance, qualifying them for current design implementations. The LT3760EFE#PBF and LT3760IFE#PBF substitutes provide the closest electrical alignment with the MP3373GY-Z, including identical 8-output configuration, matching supply voltage range (6V to 40V), and extended operating temperature to 125°C. Both Analog Devices variants support dual dimming modes (Analog and PWM), offering additional flexibility beyond the MP3373GY-Z PWM-only capability.

The TPS61199PWP from Texas Instruments functions as a viable substitute for applications where the maximum supply voltage requirement does not exceed 30V and operating temperature remains within -40°C to 85°C. This device operates in the 500kHz to 800kHz frequency range, overlapping with the MP3373GY-Z 785kHz specification. The TPS61199PWP uses a 20-pin package versus the 28-pin configuration of the primary part, requiring PCB layout modification.

Package type differences (28-SOIC versus 28-TSSOP-EP versus 20-HTSSOP) necessitate board redesign for physical substitution. Moisture sensitivity levels vary across the group, with LT3760 variants rated MSL 1 (Unlimited) versus MP3373GY-Z MSL 3 (168 Hours) and TPS61199PWP MSL 2 (1 Year), affecting storage and handling requirements.

Frequently Asked Questions (FAQ)

Q: Can the LT3760EFE#PBF directly replace the MP3373GY-Z without PCB modification?

A: No. While both devices are 28-pin packages, the MP3373GY-Z uses 28-SOIC (0.295" width) and the LT3760EFE#PBF uses 28-TSSOP-EP (0.173" width). Different pin pitch and pad geometry require PCB layout redesign. Electrical functionality is compatible.

Q: What is the primary difference between LT3760EFE#PBF and LT3760IFE#PBF?

A: Both parts are functionally identical with matching electrical specifications. The designation difference reflects internal grading or manufacturing lot tracking by Analog Devices. Selection between them does not affect circuit performance.

Q: Is the TPS61199PWP suitable for applications requiring 40V maximum supply voltage?

A: No. The TPS61199PWP maximum supply voltage is 30V. Applications requiring operation up to 40V must use the MP3373GY-Z, LT3760EFE#PBF, or LT3760IFE#PBF.

Q: How does the frequency difference between MP3373GY-Z (785kHz) and substitute parts affect circuit design?

A: The LT3760 variants operate across 100kHz to 1MHz, encompassing the MP3373GY-Z 785kHz specification. The TPS61199PWP operates 500kHz to 800kHz, overlapping at 785kHz. Frequency differences affect inductor and capacitor selection; component values must be recalculated for each substitute based on the actual switching frequency used.

Q: What are the storage and handling implications of different MSL ratings?

A: MP3373GY-Z (MSL 3) requires use within 168 hours of moisture exposure. LT3760 variants (MSL 1) have unlimited shelf life. TPS61199PWP (MSL 2) requires use within 1 year. Lower MSL ratings provide longer storage windows and reduced bake-out requirements before assembly.

Q: Can the MP3373GY-Z be used in applications designed for the TPS61199PWP?

A: Yes, provided the application supply voltage does not exceed 30V and operating temperature remains within -40°C to 85°C. The MP3373GY-Z offers extended temperature capability (to 125°C) and higher maximum supply voltage (40V), making it suitable for broader operating conditions. PCB redesign is required due to package differences.