MP3304BDD-LF-P Equivalent & Substitute Parts

Part Overview

The MP3304BDD-LF-P is an LED Driver IC manufactured by Monolithic Power Systems Inc., classified as a Power Management PMIC. This device functions as a DC-DC regulator with Step-Up (Boost) topology, delivering 1.33A switch current at 24V output from a 3V to 6V supply. It features PWM dimming capability optimized for backlight applications and operates across the industrial temperature range of -40°C to 85°C.

The MP3304BDD-LF-P maintains Active product status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Finding equivalent and substitute parts becomes necessary when addressing supply chain constraints, inventory availability, or design flexibility requirements while maintaining functional and electrical compatibility within the specified parameter envelope.

Key Parameters

Parameter	Value
Manufacturer	Monolithic Power Systems Inc.
Part Number	MP3304BDD-LF-P
Product Category	Power Management (PMIC)
Device Type	DC DC Regulator
Topology	Step-Up (Boost)
Package Type	8-QFN (2x3)
Supply Voltage Range	3V to 6V
Output Voltage	24V
Output Current	1.33A (Switch)
Switching Frequency	2.2MHz
Dimming Method	PWM
Operating Temperature	-40°C to 85°C (TA)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MP3304BDD-LF-P is determined by strict alignment across the following critical parameters:

Primary Substitution Criteria:

Device Type: DC DC Regulator with Step-Up (Boost) topology
Supply Voltage Range: 3V to 6V input capability
Output Voltage: 24V nominal output
Output Current: Minimum 1.33A switch current capacity
Dimming Method: PWM dimming support
Operating Temperature: -40°C to 85°C minimum range
RoHS Compliance: ROHS3 Compliant status
Mounting Type: Surface Mount

Parametric Equivalent Parts (MP3304BDD-LF-Z, MP3304CDD-LF-P, MP3304CDD-LF-Z) share identical electrical specifications with the main part but differ in packaging variant (tape reel suffix) or output voltage (18V for C-variant). These maintain full functional compatibility within their respective voltage specifications.

Manufacturer Recommended Alternatives (ADP1650ACBZ-R7, BD60910GU-E2, IS31BL3508B-STLS2-TR, LT1937ES5#TRMPBF, LT1937ESC6#TRMPBF, LT3491ESC8#TRMPBF, LT3518HFE#PBF) satisfy the core functional requirements of Step-Up boost regulation with PWM dimming but may introduce variations in package form factor, current rating, frequency, or supply voltage range. These alternatives remain valid for applications where the specific parameter variance does not conflict with circuit design constraints.

Parameter Comparison

Parameter	MP3304BDD-LF-P	MP3304BDD-LF-Z	MP3304CDD-LF-P	MP3304CDD-LF-Z	ADP1650ACBZ-R7	BD60910GU-E2	IS31BL3508B-STLS2-TR	LT1937ES5#TRMPBF	LT3491ESC8#TRMPBF	LT3518HFE#PBF
Manufacturer	MPS	MPS	MPS	MPS	ADI	ROHM	Lumissil	ADI	ADI	ADI
Topology	Boost	Boost	Boost	Boost	Boost	Boost	Boost	Boost	Boost	Buck/Boost
Supply Voltage (Min)	3V	3V	3V	3V	2.7V	2.7V	2.7V	2.5V	2.5V	3V
Supply Voltage (Max)	6V	6V	6V	6V	5V	5.5V	5.5V	10V	12V	30V
Output Voltage	24V	24V	18V	18V	4.575V-5.425V	Not Specified	38V	36V	Not Specified	Not Specified
Output Current	1.33A	1.33A	1.33A	1.33A	1.5A (Flash)	25.6mA	1.2A	320mA	350mA	2.3A
Switching Frequency	2.2MHz	2.2MHz	2.2MHz	2.2MHz	1.5MHz, 3MHz	1MHz	1MHz	1.2MHz	2.3MHz	250kHz-2.5MHz
Dimming Method	PWM	PWM	PWM	PWM	I2C	PWM	Analog, PWM	Analog, PWM	PWM	Analog, PWM
Package	8-QFN (2x3)	8-QFN (2x3)	8-QFN (2x3)	8-QFN (2x3)	12-WLCSP (1.5x2)	VCSP85H3	SOT-23-6	TSOT-23-5	SC-70-8	16-TSSOP-EP
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 150°C
Product Status	Active	Active	Not For New Designs	Not For New Designs	Active	Not For New Designs	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	6 (Time on Label)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Parametric Equivalents (Recommended for Primary Selection):

MP3304BDD-LF-Z represents the optimal direct substitute, maintaining identical electrical specifications and Active product status. The only distinction is the packaging variant suffix (-Z vs. -P), which reflects tape reel configuration without affecting functional performance. This part carries 4777 units in current inventory.

MP3304CDD-LF-P and MP3304CDD-LF-Z are parametric equivalents with reduced output voltage (18V vs. 24V) and carry "Not For New Designs" status. These parts are suitable only for legacy system maintenance or where 18V output specification aligns with application requirements.

Manufacturer Recommended Alternatives (Secondary Selection):

ADP1650ACBZ-R7 (Analog Devices) qualifies as an Active alternative with identical operating temperature range and RoHS3 compliance. However, this part features I2C dimming control rather than PWM, operates at lower maximum supply voltage (5V vs. 6V), and targets camera flash applications. Circuit redesign for I2C interface control is required.

IS31BL3508B-STLS2-TR (Lumissil Microsystems) provides Active status with higher output voltage capability (38V) and dual dimming modes (Analog/PWM). The SOT-23-6 package represents a significant form factor change from the 8-QFN footprint. MSL rating of 3 requires controlled storage conditions.

LT1937ES5#TRMPBF and LT1937ESC6#TRMPBF (Analog Devices) offer Active status with extended supply voltage range (2.5V to 10V) and higher output voltage (36V). Output current is reduced to 320mA, limiting applicability to lower-power backlight circuits. Both support Analog and PWM dimming modes.

LT3491ESC8#TRMPBF (Analog Devices) maintains Active status with extended supply voltage (2.5V to 12V) and comparable switching frequency (2.3MHz). Output current of 350mA and unspecified output voltage require application-specific validation.

LT3518HFE#PBF (Analog Devices) provides the highest output current capability (2.3A) and widest supply voltage range (3V to 30V) with dual topology support (Buck/Boost). Extended operating temperature to 150°C and programmable frequency (250kHz to 2.5MHz) offer design flexibility. This part is suitable for applications requiring higher current capacity or wider input voltage tolerance.

BD60910GU-E2 (ROHM Semiconductor) carries "Not For New Designs" status and MSL 6 rating, limiting suitability for new production designs. Current output of 25.6mA is insufficient for the 1.33A requirement.

Frequently Asked Questions (FAQ)

Q: Can MP3304BDD-LF-Z be used as a direct replacement for MP3304BDD-LF-P?

A: Yes. MP3304BDD-LF-Z is a parametric equivalent with identical electrical specifications, topology, and Active product status. The suffix difference (-Z vs. -P) indicates packaging variant only and does not affect functional performance or circuit compatibility.

Q: What is the primary difference between MP3304BDD-LF-P and MP3304CDD-LF-P?

A: The output voltage differs: MP3304BDD-LF-P delivers 24V while MP3304CDD-LF-P delivers 18V. Both share identical input voltage range (3V to 6V), current rating (1.33A), and frequency (2.2MHz). The C-variant carries "Not For New Designs" status and should be used only for legacy applications.

Q: Why do some alternatives have lower output current ratings?

A: LT1937ES5#TRMPBF (320mA) and LT3491ESC8#TRMPBF (350mA) are designed for lower-power backlight applications. These parts cannot deliver the full 1.33A required by the MP3304BDD-LF-P specification and are suitable only for applications with reduced current demands.

Q: What does "Not For New Designs" status mean?

A: Parts marked "Not For New Designs" (MP3304CDD-LF-P, MP3304CDD-LF-Z, BD60910GU-E2) are in mature or end-of-life phases. Manufacturers recommend against using these parts in new product development. They remain available for legacy system support and maintenance but should not be selected for new designs.

Q: How does package type affect substitution?

A: Package type determines PCB footprint and assembly compatibility. MP3304BDD-LF-P uses 8-QFN (2x3), while alternatives such as IS31BL3508B-STLS2-TR (SOT-23-6), LT1937ES5#TRMPBF (TSOT-23-5), and LT3518HFE#PBF (16-TSSOP-EP) require different PCB layouts. Package changes necessitate circuit board redesign and are not pin-compatible substitutions.

Q: What is MSL rating and why does it matter?

A: Moisture Sensitivity Level (MSL) indicates how long a component can be exposed to ambient humidity before soldering. MP3304BDD-LF-P has MSL 1 (unlimited storage), while BD60910GU-E2 has MSL 6 (time-limited per label). Higher MSL ratings require controlled storage conditions and shorter shelf life management.

Q: Can LT3518HFE#PBF replace MP3304BDD-LF-P in all applications?

A: LT3518HFE#PBF offers higher current capacity (2.3A vs. 1.33A) and wider supply voltage range (3V to 30V vs. 3V to 6V), making it suitable for applications requiring greater flexibility. However, the dual Buck/Boost topology and 16-TSSOP package require circuit redesign. Output voltage is unspecified and must be validated for your application.

Q: Why does ADP1650ACBZ-R7 use I2C dimming instead of PWM?

A: ADP1650ACBZ-R7 is optimized for camera flash applications where digital I2C control provides precise brightness management. This differs from the PWM dimming in MP3304BDD-LF-P. Substitution requires microcontroller interface redesign and is not a direct functional replacement.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All parts listed in this reference maintain ROHS3 compliance status, ensuring compatibility with environmental and regulatory requirements across all regions.

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