MP1528DQ-LF-P Equivalent & Substitute Parts

Part Overview

The MP1528DQ-LF-P is an LED Driver IC manufactured by Monolithic Power Systems Inc., classified as a Power Management PMIC. This single-output DC-DC regulator features Step-Up (Boost) topology with internal switching capability, designed for backlight applications requiring PWM and analog dimming control. The device operates across a 2.7V to 36V supply range with 950mA switch current capability and is housed in a 6-QFN (3x3) package. The part maintains Active product status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified when design requirements necessitate alternative packaging formats, different supply voltage ranges, modified output current specifications, or when primary part availability is constrained. Substitutes must maintain functional equivalence in LED driver topology and dimming capability while accommodating application-specific constraints.

Key Parameters

Parameter	MP1528DQ-LF-P
Manufacturer	Monolithic Power Systems Inc.
Type	DC DC Regulator
Topology	Step-Up (Boost)
Number of Outputs	1
Voltage - Supply (Min)	2.7V
Voltage - Supply (Max)	36V
Voltage - Output	36V
Current - Output / Channel	950mA (Switch)
Dimming	Analog, PWM
Applications	Backlight
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	6-VDFN Exposed Pad
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the MP1528DQ-LF-P is determined by the following critical parameters:

Primary Substitution Criteria:

Topology: Step-Up (Boost) configuration with internal switching
Dimming Capability: Analog and/or PWM dimming support
Supply Voltage Range: Minimum 2.7V input compatibility
Output Current: Rated for LED driver applications (typically 350mA to 2.8A switch current)
Application Class: LED driver or backlight-specific design
Product Status: Active manufacturing status
Compliance: ROHS3 and REACH compliance maintained

Secondary Compatibility Factors:

Package format (QFN, SOT-23, TSOT-23, HVSSOP, DSBGA, MLF, TSSOP)
Operating temperature range (-40°C minimum)
Moisture sensitivity level (MSL 1 or MSL 3 acceptable for most applications)

Substitute parts are grouped by functional equivalence within these parameters. Parts with differing topologies (Step-Down/Buck, SEPIC), reduced dimming capability (PWM-only or no dimming), or incompatible supply voltage ranges are included only when application flexibility permits topology or control method substitution.

Parameter Comparison

Part Number	Manufacturer	Topology	Supply Min	Supply Max	Output Current	Dimming	Package	Temp Range	Product Status
MP1528DQ-LF-P	Monolithic Power Systems	Step-Up (Boost)	2.7V	36V	950mA	Analog, PWM	6-VDFN	-40°C ~ 85°C	Active
AP3031KTR-G1	Diodes Incorporated	Step-Up (Boost)	2.7V	16V	1.4A	PWM	TSOT-23-6	-40°C ~ 85°C	Active
IS31BL3508A-STLS2-TR	Lumissil Microsystems	Step-Up (Boost)	2.7V	5.5V	1.6A	Analog, PWM	SOT-23-6	-40°C ~ 85°C	Active
LM3407MYX/NOPB	Texas Instruments	Step-Down (Buck)	4.5V	30V	350mA	PWM	8-HVSSOP	-40°C ~ 125°C	Active
LM3410XMFX/NOPB	Texas Instruments	SEPIC, Step-Up (Boost)	2.7V	5.5V	2.8A	PWM	SOT-23-5	-40°C ~ 125°C	Active
LM3530UME-25A/NOPB	Texas Instruments	Step-Up (Boost)	2.7V	5.5V	30mA	PWM	12-DSBGA	-40°C ~ 85°C	Active
LM36010YKBR	Texas Instruments	Step-Up (Boost)	2.5V	5.5V	1.5A	No	8-DSBGA	-40°C ~ 85°C	Active
LM3642TLE/NOPB	Texas Instruments	Step-Up (Boost)	2.5V	5.5V	1.5A (Flash)	I2C	9-DSBGA	-40°C ~ 85°C	Active
LT3491ESC8#TRPBF	Analog Devices Inc.	Step-Up (Boost)	2.5V	12V	350mA	PWM	SC-70-8	-40°C ~ 85°C	Active
MIC2293-34YML-TR	Microchip Technology	Step-Up (Boost)	2.5V	10V	750mA	Analog, PWM	8-MLF	-40°C ~ 125°C	Active
MIC3223YTSE-TR	Microchip Technology	Step-Up (Boost)	4.5V	20V	4.6A	PWM	16-TSSOP-EP	-40°C ~ 125°C	Active

Engineering Selection Recommendations

Direct Substitutes (Highest Compatibility):

AP3031KTR-G1 and IS31BL3508A-STLS2-TR maintain Step-Up (Boost) topology with 2.7V minimum supply voltage and PWM dimming capability. Both devices are Active status with ROHS3 compliance. AP3031KTR-G1 extends to 16V maximum supply and delivers 1.4A output current in TSOT-23-6 packaging. IS31BL3508A-STLS2-TR supports analog and PWM dimming with 1.6A output in SOT-23-6 format but is limited to 5.5V maximum supply. Both are suitable for backlight applications where supply voltage constraints permit.

MIC2293-34YML-TR provides the closest current-handling match at 750mA with dual dimming support (Analog, PWM) and Step-Up topology. Operating temperature extends to 125°C (TJ) with ROHS3 compliance. Supply range limitation to 10V maximum requires application verification.

Conditional Substitutes (Topology or Control Variation):

LM3410XMFX/NOPB combines SEPIC and Step-Up topology with 2.8A switch current and PWM dimming in SOT-23-5 packaging. Extended operating temperature to 125°C (TJ) and ROHS3 compliance are maintained. Supply voltage limited to 5.5V maximum.

LT3491ESC8#TRPBF maintains Step-Up topology with PWM dimming and 350mA output current in SC-70-8 package. Supply range extends to 12V maximum with ROHS3 compliance and -40°C to 85°C operating temperature.

Limited Compatibility Substitutes:

LM3407MYX/NOPB employs Step-Down (Buck) topology, fundamentally different from the MP1528DQ-LF-P boost configuration. Suitable only when application topology requirements permit buck regulation. 350mA output current and PWM dimming with extended temperature range to 125°C (TJ).

LM3530UME-25A/NOPB and LM36010YKBR feature reduced output current (30mA and 1.5A respectively) and limited supply voltage range to 5.5V maximum. LM36010YKBR lacks dimming capability entirely. These are suitable only for low-power backlight or mobile communication applications.

LM3642TLE/NOPB implements I2C dimming control rather than analog/PWM, designed for camera flash applications. Substitution requires application-level firmware modification.

MIC3223YTSE-TR supports higher output current (4.6A) and extended supply range to 20V but requires minimum 4.5V input. Suitable for higher-power lighting and signage applications.

All substitute parts maintain Active product status and ROHS3 compliance. Moisture sensitivity levels (MSL 1 or MSL 3) are acceptable for standard PCB assembly processes.

Frequently Asked Questions (FAQ)

Q: Can AP3031KTR-G1 replace MP1528DQ-LF-P in all applications?

A: AP3031KTR-G1 is functionally compatible for backlight applications operating within 2.7V to 16V supply range. The MP1528DQ-LF-P supports supply voltages up to 36V; applications requiring higher input voltages cannot use AP3031KTR-G1. Both devices support PWM dimming and maintain ROHS3 compliance. Package format differs (TSOT-23-6 vs. 6-VDFN), requiring PCB layout modification.

Q: What is the key difference between IS31BL3508A-STLS2-TR and MP1528DQ-LF-P?

A: IS31BL3508A-STLS2-TR supports both analog and PWM dimming like the MP1528DQ-LF-P but is restricted to 5.5V maximum supply voltage compared to 36V for the main part. Output current is 1.6A versus 950mA. Both employ Step-Up topology and maintain -40°C to 85°C operating temperature. MSL rating differs (MSL 3 vs. MSL 1).

Q: Why is LM3407MYX/NOPB listed as a substitute if it uses Buck topology?

A: LM3407MYX/NOPB is included as a conditional substitute for applications where Step-Down (Buck) regulation is acceptable. It provides PWM dimming control and operates across 4.5V to 30V supply range. Topology substitution is valid only when application power architecture permits buck conversion instead of boost conversion.

Q: Can MIC2293-34YML-TR handle the same output current as MP1528DQ-LF-P?

A: MIC2293-34YML-TR delivers 750mA switch current compared to 950mA for MP1528DQ-LF-P. For applications requiring full 950mA output, MIC2293-34YML-TR is undersized. For backlight applications operating below 750mA, it provides suitable substitution with analog and PWM dimming support and extended operating temperature to 125°C (TJ).

Q: What packaging considerations apply when substituting MP1528DQ-LF-P?

A: MP1528DQ-LF-P uses 6-VDFN (3x3) format. Substitutes employ various packages: TSOT-23-6, SOT-23-6, 8-HVSSOP, SOT-23-5, 12-DSBGA, 8-DSBGA, 9-DSBGA, SC-70-8, 8-MLF, and 16-TSSOP-EP. Each package has different footprint, thermal characteristics, and PCB routing requirements. Verify PCB layout compatibility and thermal performance before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts maintain ROHS3 compliance. Moisture sensitivity levels vary between MSL 1 (unlimited) and MSL 3 (168 hours). Standard PCB assembly processes accommodate both ratings. Verify storage and handling procedures for MSL 3 components in your manufacturing environment.

Q: Which substitute provides the highest output current capability?

A: MIC3223YTSE-TR delivers 4.6A switch current, the highest among listed substitutes. This device operates across 4.5V to 20V supply range with PWM dimming and 16-TSSOP-EP packaging. It is designed for higher-power lighting and signage applications rather than standard backlight use.

Q: Can LM3410XMFX/NOPB replace MP1528DQ-LF-P in boost applications?

A: LM3410XMFX/NOPB combines SEPIC and Step-Up topology with 2.8A switch current and PWM dimming. Supply voltage is limited to 5.5V maximum compared to 36V for MP1528DQ-LF-P. For applications operating within 2.7V to 5.5V input range, LM3410XMFX/NOPB provides higher output current capability with extended operating temperature to 125°C (TJ).

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