MP3386DR-LF-Z LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP3386DR-LF-Z is a 6-output LED driver IC manufactured by Monolithic Power Systems Inc., designed for backlight applications with step-up (boost) topology and PWM dimming capability. This device operates from 4.5V to 25V input and delivers 50V output with 30mA per channel. The part is classified as "Not For New Designs," making equivalent and substitute parts necessary for ongoing production and new design implementations.

Key Parameters

Parameter	Value
Manufacturer Part Number	MP3386DR-LF-Z
Manufacturer	Monolithic Power Systems Inc.
Category	Power Management (PMIC)
Type	DC DC Regulator
Topology	Step-Up (Boost)
Number of Outputs	6
Voltage - Supply (Min)	4.5V
Voltage - Supply (Max)	25V
Voltage - Output	50V
Current - Output / Channel	30mA
Frequency	1.25MHz
Dimming	PWM
Package / Case	24-VFQFN Exposed Pad
Operating Temperature	-40°C ~ 85°C (TA)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the MP3386DR-LF-Z is determined by the following critical parameters:

Primary Compatibility Criteria:

Topology: Step-Up (Boost) DC DC Regulator
Number of Outputs: 6 outputs
Voltage - Supply Range: Minimum 4.5V, Maximum 25V
Voltage - Output: 50V or compatible range
Current - Output / Channel: 30mA or higher
Dimming: PWM capability
Applications: Backlight
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Substitute parts are grouped into two categories based on output current capability and package compatibility:

Category A - Direct Current Rating (30mA): Parts with 30mA per channel output current matching the original specification.

Category B - Higher Current Rating (50mA+): Parts with higher output current capability, suitable for applications requiring greater per-channel current delivery while maintaining core functionality.

Parameter Comparison

Parameter	MP3386DR-LF-Z	MP3388SGR-Z	ISL97671AIRZ-TK	ISL97672BIRZ-T	LP8545SQ/NOPB	TPS61187RTJR	LT3598EFE#TRPBF
Manufacturer	MPS	MPS	Renesas	Renesas	TI	TI	ADI
Number of Outputs	6	8	6	6	6	6	6
Voltage - Supply (Min)	4.5V	4.3V	4.5V	4.5V	2.7V	4.5V	3V
Voltage - Supply (Max)	25V	25V	26.5V	26.5V	22V	24V	30V
Voltage - Output	50V	50V	45V	45V	40V	38V	44V
Current - Output / Channel	30mA	20mA	50mA	50mA	50mA	30mA	30mA
Frequency	1.25MHz	1.25MHz	600kHz, 1.14MHz	200kHz ~ 1.5MHz	156kHz, 312kHz, 625kHz, 1250kHz	1MHz	200kHz ~ 2.5MHz
Dimming	PWM	PWM	PWM	PWM	PWM	PWM	Analog, PWM
Package / Case	24-VFQFN Exposed Pad	24-VFQFN Exposed Pad	20-VFQFN Exposed Pad	20-VFQFN Exposed Pad	24-WFQFN Exposed Pad	20-WFQFN Exposed Pad	24-TSSOP Exposed Pad
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 125°C (TJ)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-30°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 125°C (TJ)
Product Status	Not For New Designs	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)	2 (1 Year)	1 (Unlimited)

Engineering Selection Recommendations

MP3388SGR-Z (MPS): Active product status with identical 24-VFQFN package and 1.25MHz frequency. Supports 8 outputs with 20mA per channel and extended operating temperature to 125°C. Suitable for designs requiring additional output channels with lower per-channel current requirements.

TPS61187RTJR (Texas Instruments): Active product with matching 30mA per channel current rating and 6 outputs. 20-WFQFN package differs from original. 1MHz frequency and 38V output voltage are within acceptable range for backlight applications. MSL rating of 2 requires standard moisture control during assembly.

LT3598EFE#TRPBF (Analog Devices): Active product offering dual dimming capability (Analog and PWM). 24-TSSOP package provides alternative form factor. Extended supply voltage range to 30V and operating temperature to 125°C. MSL rating of 1 provides unlimited moisture sensitivity tolerance.

ISL97671AIRZ-TK and ISL97672BIRZ-T (Renesas): Active products with 50mA per channel output current and 6 outputs. 20-VFQFN package differs from original. Both support PWM dimming with frequency ranges suitable for backlight applications. MSL rating of 3 requires controlled moisture environment during assembly and storage.

LP8545SQ/NOPB (Texas Instruments): Active product with 50mA per channel and 6 outputs. 24-WFQFN package maintains similar footprint. Extended supply voltage range to 22V and multiple frequency options. MSL rating of 1 provides unlimited moisture sensitivity tolerance.

All substitute parts maintain ROHS3 compliance and step-up boost topology required for backlight LED driver applications.

Frequently Asked Questions (FAQ)

Q: Can MP3388SGR-Z replace MP3386DR-LF-Z in existing designs?

A: MP3388SGR-Z is compatible for designs where 8 outputs and 20mA per channel meet application requirements. The identical 24-VFQFN package and 1.25MHz frequency enable direct substitution if output current and channel count are acceptable. Extended operating temperature to 125°C provides additional thermal margin.

Q: What is the primary difference between 30mA and 50mA output current ratings?

A: Output current rating determines maximum LED current per channel. The MP3386DR-LF-Z supports 30mA per channel. Substitute parts with 50mA rating provide higher per-channel current capability, allowing brighter LED operation or support for additional LEDs per channel. Lower current ratings (20mA) reduce per-channel capability.

Q: Are package differences between QFN and TSSOP significant?

A: Yes. QFN packages (24-VFQFN, 20-VFQFN, 24-WFQFN, 20-WFQFN) and TSSOP packages (24-TSSOP) have different footprints, pin layouts, and thermal characteristics. PCB layout redesign is required when switching package types. Thermal performance may differ due to exposed pad configuration variations.

Q: What does MSL rating mean for component selection?

A: Moisture Sensitivity Level (MSL) indicates moisture absorption limits and required storage conditions. MSL 1 (Unlimited) requires no special moisture control. MSL 2 (1 Year) requires controlled storage for up to one year. MSL 3 (168 Hours) requires controlled environment for maximum 168 hours before reflow soldering. Higher MSL ratings require more stringent handling procedures.

Q: Can I use a substitute with lower output voltage (38V vs 50V)?

A: Output voltage capability must meet or exceed application requirements. TPS61187RTJR provides 38V maximum output, which is lower than the original 50V. This is acceptable only if your LED string voltage requirement is 38V or less. Verify LED forward voltage specifications before substitution.

Q: What is the significance of operating temperature range differences?

A: MP3386DR-LF-Z operates -40°C to 85°C (TA). Substitutes with -40°C to 125°C (TJ) provide extended thermal operating range. Extended range is beneficial for high-temperature environments but does not affect performance in standard operating conditions. Verify your application's thermal requirements before selecting based on temperature range alone.

Q: Are all substitute parts suitable for new designs?

A: All listed substitute parts have Active product status, making them suitable for new designs. The original MP3386DR-LF-Z is marked "Not For New Designs," which is the primary reason substitution is necessary for ongoing product development.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message