MIC2289-15BML-TR Equivalent & Substitute Parts

Part Overview

The MIC2289-15BML-TR is a LED Driver IC with integrated DC-DC Step-Up (Boost) regulator manufactured by Microchip Technology. This device delivers 750mA switch current with a 15V output, operating from a 2.5V to 10V supply range. It features analog and PWM dimming capabilities and is housed in an 8-MLF package. The part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	MIC2289-15BML-TR
Manufacturer	Microchip Technology
Product Category	Power Management (PMIC) - LED Driver IC
Topology	Step-Up (Boost) DC-DC Regulator
Number of Outputs	1
Voltage Supply Range	2.5V to 10V
Output Voltage	15V
Switch Current	750mA
Switching Frequency	1.2MHz
Dimming Control	Analog, PWM
Package Type	8-MLF (2x2)
Operating Temperature	-40°C to 125°C (TJ)
Product Status	Discontinued at DiGi Electronics
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution for the MIC2289-15BML-TR is determined by the following critical parameters:

Primary Substitution Criteria:

Topology: Step-Up (Boost) DC-DC Regulator with internal switch
Output voltage capability: Minimum 15V or higher
Switch current rating: 750mA or higher
Supply voltage range: Must overlap or exceed 2.5V to 10V input range
Dimming control: Analog and/or PWM capability
Package type: Surface mount with compatible pinout
Operating temperature range: -40°C minimum preferred for industrial applications

Secondary Considerations:

Switching frequency: 1.2MHz nominal (tolerance range acceptable)
RoHS compliance status
Product status: Active parts preferred over obsolete or discontinued

Substitute parts are grouped into two categories based on functional compatibility:

Category A - Direct Functional Equivalents (Boost topology, 750mA+ current, 15V+ output):

IS31BL3508B-STLS2-TR (1.2A, 38V output, Analog/PWM dimming)
LT3465ES6#TRPBF (225mA, 30V output, PWM dimming)
LT3491EDC#TRMPBF (260mA, 27V output, PWM dimming)
MP1518DJ-LF-Z (350mA, 25V output, Analog/PWM dimming)

Category B - Alternative Topologies or Reduced Current Ratings (Boost topology, lower current or output voltage):

AP5725WG-7 (750mA, 26V output, PWM dimming only)
LM3530UMX-40B/NOPB (30mA, 40V output, PWM dimming only)
LM3555TLE/NOPB (500mA Flash, 9.96V output, I2C dimming)

Category C - Different Topology (Buck or Buck-Boost, not direct substitutes):

LM3414MR/NOPB (Buck topology, 1A, automotive grade)
MP2483DS-LF-Z (Buck-Boost topology, 2.5A, automotive grade)

Category D - Reduced Performance (Lower current or voltage output):

BD6069GUT-E2 (270mA, 18V output, no dimming control, obsolete)

Parameter Comparison

Part Number	Manufacturer	Topology	Output Voltage	Switch Current	Supply Range (Min-Max)	Dimming	Frequency	Package	Temp Range	Status	RoHS
MIC2289-15BML-TR	Microchip	Boost	15V	750mA	2.5V-10V	Analog, PWM	1.2MHz	8-MLF	-40 to 125°C	Discontinued	Non-compliant
IS31BL3508B-STLS2-TR	Lumissil	Boost	38V	1.2A	2.7V-5.5V	Analog, PWM	1MHz	SOT-23-6	-40 to 85°C	Active	ROHS3
AP5725WG-7	Diodes Inc.	Boost	26V	750mA	2.7V-5.5V	PWM	1.2MHz	SOT-23-6	-40 to 85°C	Active	ROHS3
LT3465ES6#TRPBF	Analog Devices	Boost	30V	225mA	2.7V-16V	PWM	1.2MHz	TSOT-23-6	-40 to 85°C	Active	ROHS3
LT3491EDC#TRMPBF	Analog Devices	Boost	27V	260mA	2.5V-12V	PWM	2.3MHz	6-DFN	-40 to 85°C	Active	ROHS3
MP1518DJ-LF-Z	MPS	Boost	25V	350mA	2.5V-6V	Analog, PWM	1.3MHz	TSOT-23-6	-40 to 125°C	Active	ROHS3
LM3530UMX-40B/NOPB	Texas Instruments	Boost	40V	30mA	2.7V-5.5V	PWM	500kHz	12-DSBGA	-40 to 85°C	Active	ROHS3
LM3414MR/NOPB	Texas Instruments	Buck	Variable	1A	4.5V-42V	Analog, PWM	500kHz	8-PowerSOIC	-40 to 125°C	Active	ROHS3
MP2483DS-LF-Z	MPS	Buck-Boost	Variable	2.5A	4.5V-55V	Analog, PWM	500kHz	14-SOIC	-40 to 85°C	Active	ROHS3

Engineering Selection Recommendations

For Direct Boost Topology Replacement (Recommended Primary Options):

IS31BL3508B-STLS2-TR is the strongest functional equivalent. It maintains Boost topology, exceeds the 750mA current requirement at 1.2A, supports both Analog and PWM dimming, and is RoHS3 compliant with Active product status. The 38V output capability exceeds the 15V requirement. Supply range is narrower (2.7V-5.5V vs. 2.5V-10V), which may require input circuit redesign. Operating temperature maximum is 85°C versus 125°C on the original part.

AP5725WG-7 provides exact 750mA current matching and maintains 1.2MHz switching frequency. It is RoHS3 compliant and Active. Output voltage of 26V exceeds 15V requirement. Supply range is 2.7V-5.5V (narrower than original). Dimming is PWM only, lacking Analog control. Package is SOT-23-6 versus 8-MLF, requiring PCB layout modification.

MP1518DJ-LF-Z offers Analog and PWM dimming matching the original part and maintains -40°C to 125°C operating temperature range. It is RoHS3 compliant and Active. Current rating of 350mA is lower than 750mA requirement. Supply range is 2.5V-6V. Output voltage of 25V exceeds 15V. Package is TSOT-23-6.

For Applications Requiring Higher Current Capability:

LT3491EDC#TRMPBF and LT3465ES6#TRPBF are suitable when output voltage can be higher than 15V. Both are RoHS3 compliant and Active. Current ratings (260mA and 225mA respectively) are lower than the original 750mA specification.

For Alternative Topology Applications (Not Direct Substitutes):

LM3414MR/NOPB uses Buck topology instead of Boost, suitable only for applications where output voltage is lower than input voltage. It provides 1A current, Analog/PWM dimming, and automotive-grade qualification. RoHS3 compliant and Active.

MP2483DS-LF-Z provides Buck-Boost topology with 2.5A current capability and automotive-grade qualification. Suitable for applications requiring flexible input-to-output voltage relationships. RoHS3 compliant and Active.

Parts Not Recommended:

BD6069GUT-E2 is Obsolete and lacks dimming control capability. Current rating of 270mA is insufficient for 750mA requirement.

LM3530UMX-40B/NOPB has insufficient current rating (30mA) for backlight applications requiring 750mA.

LM3555TLE/NOPB is designed for camera flash applications with I2C dimming control, not suitable for general LED backlight replacement.

Frequently Asked Questions (FAQ)

Q: Can I directly replace MIC2289-15BML-TR with IS31BL3508B-STLS2-TR without circuit modifications?

A: The IS31BL3508B-STLS2-TR maintains Boost topology and dimming capability but requires PCB layout changes due to different package (SOT-23-6 vs. 8-MLF). Supply voltage range is narrower (2.7V-5.5V vs. 2.5V-10V), which may require input circuit redesign depending on your application's minimum supply voltage. Verify that your input supply meets the 2.7V minimum requirement.

Q: Why do some substitute parts have lower current ratings than the original 750mA?

A: LED driver ICs are application-specific. Lower current ratings (225mA, 260mA, 350mA) are suitable for lower-power backlight applications. Selection depends on your LED load current requirement. If your design requires 750mA, choose AP5725WG-7 or IS31BL3508B-STLS2-TR.

Q: What is the difference between Analog and PWM dimming?

A: Analog dimming adjusts LED brightness by varying the output voltage. PWM dimming switches the output on and off at high frequency to control average brightness. The original MIC2289-15BML-TR supports both methods. Some substitutes (AP5725WG-7, LT3465ES6#TRPBF, LT3491EDC#TRMPBF) support PWM only. Verify your application's dimming interface requirement before selection.

Q: Can I use LM3414MR/NOPB or MP2483DS-LF-Z as replacements?

A: These parts use different topologies (Buck and Buck-Boost respectively) and are not direct substitutes for the Boost topology MIC2289-15BML-TR. They are suitable only if your application can accept a different voltage conversion topology. LM3414MR/NOPB is a Buck converter (output lower than input), while MP2483DS-LF-Z can operate as either Buck or Boost depending on configuration.

Q: Why is RoHS compliance important for this selection?

A: The original MIC2289-15BML-TR is RoHS non-compliant. Most substitute parts are ROHS3 compliant, which may be required for new designs or specific markets. Verify your application's regulatory requirements before selecting a part.

Q: What package considerations should I account for?

A: The original part uses 8-MLF (2x2) package. Most substitutes use SOT-23-6 or smaller packages (6-DFN, 12-DSBGA). Package changes require PCB redesign, including trace routing, thermal management, and component placement. Verify pinout compatibility and thermal requirements for your application.

Q: Is operating temperature range critical for my selection?

A: The original part operates to 125°C (TJ). Most substitutes operate to 85°C (TA). If your application requires operation above 85°C, MP1518DJ-LF-Z maintains the -40°C to 125°C range. Verify your application's thermal environment and component placement location.

Q: Can I use LM3530UMX-40B/NOPB or LM3555TLE/NOPB?

A: LM3530UMX-40B/NOPB has insufficient current rating (30mA) for typical LED backlight applications. LM3555TLE/NOPB is designed for camera flash applications with I2C control interface. Neither is suitable as a general replacement for the MIC2289-15BML-TR in backlight applications.

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