MP3388EY-LF Equivalent & Substitute Parts

Part Overview

The MP3388EY-LF is an active LED driver IC manufactured by Monolithic Power Systems Inc., classified as a Power Management PMIC. This device functions as an 8-output DC-DC regulator with step-up (boost) topology, PWM dimming capability, and a maximum output current of 20mA per channel. The part is in active production status with ROHS3 compliance and is commonly used in backlight applications requiring regulated voltage conversion from 4.5V to 25V input range to a 50V output.

Substitute parts are identified when equivalent functional performance can be achieved through alternative manufacturers while maintaining compatibility with the same application requirements, operating parameters, and form factor constraints.

Substiute Parts

MP3388EY-LF

Monolithic Power Systems Inc.In Stock: 961MP3388EY-LF Datasheet

Current PartRFQ

TPS61185RGET

Texas InstrumentsIn Stock: 3281TPS61185RGET Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MP3388EY-LF are qualified based on the following critical parameters that define functional equivalence:

• Topology: Step-Up (Boost) DC-DC regulator with internal switching capability
• Output Configuration: 8-channel LED driver output
• PWM Dimming: Pulse-width modulation dimming control
• Supply Voltage Range: Minimum 4.2V to 4.5V input; maximum 24V to 25V input
• Output Voltage Capability: Minimum 38V to 50V output range
• Output Current: Minimum 20mA to 25mA per channel
• Switching Frequency: Operating range 600kHz to 2MHz
• Application Class: Backlight LED driver
• Regulatory Compliance: ROHS3 compliant
• Mounting Type: Surface mount technology

The TPS61185RGET from Texas Instruments meets these substitution criteria with compatible electrical performance within the specified parameter ranges, though package form factor differs (24-VQFN vs. 28-SOIC).

Parameter Comparison

Engineering Selection Recommendations

Selection between MP3388EY-LF and TPS61185RGET is determined by application-specific requirements and design constraints:

MP3388EY-LF is the primary choice when:

• Output voltage requirement exceeds 38V (up to 50V capability)
• Input supply voltage exceeds 24V (up to 25V capability)
• 28-SOIC package footprint is required for PCB layout compatibility
• Operating temperature range of -20°C to 85°C is sufficient
• Moisture sensitivity level 3 (168 hours) meets storage and handling requirements

TPS61185RGET is suitable as a substitute when:

• Output voltage requirement is 38V or lower
• Input supply voltage is 24V or lower
• 24-VQFN (4x4) package footprint is compatible with PCB design
• Higher output current per channel (25mA vs. 20mA) provides design margin
• Extended operating temperature range (-40°C to 85°C) is beneficial
• Lower moisture sensitivity level (MSL 2, 1 year) is advantageous for storage

Both parts maintain ROHS3 compliance and are suitable for backlight LED driver applications. PCB layout redesign is required when substituting due to different package geometries.

Frequently Asked Questions (FAQ)

Q: Can TPS61185RGET directly replace MP3388EY-LF without PCB modification?

A: No. While both devices provide equivalent LED driver functionality, the package form factors differ (28-SOIC vs. 24-VQFN). PCB layout redesign is required, including pad pattern modification and trace routing adjustments. Pin-to-pin compatibility does not exist between these packages.

Q: What is the maximum output voltage difference between these parts?

A: MP3388EY-LF supports 50V output, while TPS61185RGET supports 38V output. Applications requiring output voltages between 38V and 50V cannot use TPS61185RGET as a substitute.

Q: Does TPS61185RGET provide higher current capability?

A: Yes. TPS61185RGET provides 25mA per channel compared to MP3388EY-LF at 20mA per channel. This 5mA additional capacity per channel may provide design margin in current-limited applications.

Q: Are there temperature range differences?

A: Yes. TPS61185RGET operates from -40°C to 85°C, while MP3388EY-LF operates from -20°C to 85°C. TPS61185RGET is suitable for applications requiring extended low-temperature operation below -20°C.

Q: What is the moisture sensitivity difference?

A: MP3388EY-LF has MSL 3 (168 hours), while TPS61185RGET has MSL 2 (1 year). Lower MSL ratings indicate longer shelf life and reduced moisture absorption risk during storage and handling.

Q: Can I use TPS61185RGET if my design requires 45V output?

A: No. TPS61185RGET maximum output voltage is 38V. Applications requiring output voltages above 38V must use MP3388EY-LF or identify alternative parts with higher output voltage capability.

Q: Are both parts RoHS compliant?

A: Yes. Both MP3388EY-LF and TPS61185RGET are ROHS3 compliant and meet regulatory requirements for restricted substance elimination.