MP3352DQ-LF-P LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP3352DQ-LF-P is a LED Driver IC manufactured by Monolithic Power Systems Inc., classified as a Power Management (PMIC) device. This single-output DC-DC regulator utilizes Flyback topology with an internal switch, designed for camera flash applications. The device operates across a 3V to 6V supply range and delivers 60V output, packaged in a 16-QFN-3-EP surface mount configuration.

The MP3352DQ-LF-P carries a "Not For New Designs" product status, indicating it is obsolete or being phased out. Identifying equivalent and substitute parts is necessary for ongoing production support, design continuity, and component availability assurance.

Key Parameters

Parameter	Value
Manufacturer Part Number	MP3352DQ-LF-P
Manufacturer	Monolithic Power Systems Inc.
Category	Power Management (PMIC)
Type	DC DC Regulator
Topology	Flyback
Number of Outputs	1
Voltage - Supply (Min)	3V
Voltage - Supply (Max)	6V
Voltage - Output	60V
Internal Switch(s)	Yes
Applications	Camera Flash
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	16-VFQFN Exposed Pad
Supplier Device Package	16-QFN-3-EP
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Not For New Designs

Substitute Part Grouping Explanation

Substitution of the MP3352DQ-LF-P is determined by the following critical parameters:

Topology: Flyback, Step-Down (Buck), Step-Up (Boost), or multi-topology support
Number of Outputs: Single output requirement
Voltage Supply Range: Minimum 3V to 6V input capability
Voltage Output: 60V or higher output capability
Internal Switch: Integrated switching element required
Operating Temperature Range: -40°C to 85°C or wider
Package Type: Surface mount configurations
RoHS Compliance: ROHS3 Compliant
Product Status: Active or equivalent lifecycle status

The substitute parts listed below meet these criteria with varying topologies, package configurations, and enhanced specifications suitable for camera flash and LED driver applications.

Parameter Comparison

Parameter	MP3352DQ-LF-P	LT3954IUHE#TRPBF	RT9284B-20GJ6E	A6213KLJTR-T	LT3517EUF#TRPBF	LT3518EFE#PBF	LM3561TMX/NOPB	TPS61165TDBVRQ1
Manufacturer	MPS	Analog Devices	Richtek	Allegro	Analog Devices	Analog Devices	Texas Instruments	Texas Instruments
Type	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator
Topology	Flyback	Flyback, SEPIC, Buck, Boost	PWM	Buck	Buck, Boost	Buck, Boost	Boost	Boost
Number of Outputs	1	1	1	1	1	1	1	1
Voltage - Supply (Min)	3V	4.5V	2.7V	6V	3V	3V	2.5V	3V
Voltage - Supply (Max)	6V	40V	5.5V	48V	30V	30V	5.5V	18V
Voltage - Output	60V	-	20V	-	-	-	-	3V ~ 38V
Internal Switch(s)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 105°C
Package / Case	16-VFQFN Exposed Pad	36-WFQFN, 28 Leads, Exposed Pad	SOT-23-6 Thin, TSOT-23-6	8-SOIC (0.154", 3.90mm Width) Exposed Pad	16-WQFN Exposed Pad	16-TSSOP (0.173", 4.40mm Width) Exposed Pad	12-WFBGA, DSBGA	SOT-23-6
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Not For New Designs	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed are ROHS3 compliant and carry Active product status, ensuring long-term availability and manufacturing support. Selection among these alternatives depends on specific application requirements:

LT3954IUHE#TRPBF (Analog Devices) offers the broadest topology support (Flyback, SEPIC, Buck, Boost) with extended voltage supply range (4.5V to 40V) and highest switch current rating (5A). This part provides maximum design flexibility for camera flash and LED driver applications with enhanced thermal performance across -40°C to 125°C.

LT3517EUF#TRPBF and LT3518EFE#PBF (Analog Devices) both support dual topologies (Buck and Boost) with supply ranges of 3V to 30V, suitable for backlight applications. LT3518EFE#PBF provides higher switch current (2.3A) compared to LT3517EUF#TRPBF (1.5A) in a 16-TSSOP package.

LM3561TMX/NOPB (Texas Instruments) is optimized for camera flash with Step-Up (Boost) topology, 2.5V to 5.5V supply range, and I2C dimming control. This part maintains the same operating temperature range as the original (-40°C to 85°C) and is available in 12-DSBGA packaging.

RT9284B-20GJ6E (Richtek) provides compact SOT-23-6 packaging with 20V output capability, 2.7V to 5.5V supply range, and PWM dimming at 1.2MHz frequency, suitable for space-constrained camera flash designs.

TPS61165TDBVRQ1 (Texas Instruments) offers automotive-grade qualification (AEC-Q100) with Step-Up (Boost) topology, 3V to 18V supply range, and 1.2A switch current in SOT-23-6 packaging.

A6213KLJTR-T (Allegro MicroSystems) provides automotive-grade qualification (AEC-Q100) with Step-Down (Buck) topology, 6V to 48V supply range, and 3A output current in 8-SOIC packaging.

Frequently Asked Questions (FAQ)

Q: Can the LT3954IUHE#TRPBF directly replace the MP3352DQ-LF-P in existing designs?

A: The LT3954IUHE#TRPBF is functionally compatible as a substitute due to shared Flyback topology support, single output configuration, and ROHS3 compliance. However, the package differs (36-QFN vs. 16-QFN), requiring PCB layout modifications. The extended voltage supply range (4.5V to 40V) and higher switch current (5A) provide enhanced capability for camera flash applications.

Q: What is the primary difference between Flyback and Boost topologies for LED driver applications?

A: Flyback topology, used in the MP3352DQ-LF-P, provides galvanic isolation and is optimized for high-voltage step-up conversion from low input voltages. Boost (Step-Up) topology, used in LM3561TMX/NOPB and TPS61165TDBVRQ1, provides non-isolated step-up conversion and is suitable for applications requiring simpler circuit designs with lower component counts.

Q: Are all substitute parts suitable for camera flash applications?

A: LM3561TMX/NOPB and RT9284B-20GJ6E are explicitly rated for camera flash applications. LT3954IUHE#TRPBF, LT3517EUF#TRPBF, and LT3518EFE#PBF support LED driver functionality with flexible topologies suitable for flash circuits. A6213KLJTR-T and TPS61165TDBVRQ1 are rated for backlight applications but may be adapted for flash designs depending on circuit requirements.

Q: What packaging considerations should be evaluated when selecting a substitute?

A: The MP3352DQ-LF-P uses 16-QFN-3-EP packaging. Substitute parts employ various packages: 36-QFN (LT3954IUHE#TRPBF), SOT-23-6 (RT9284B-20GJ6E, TPS61165TDBVRQ1), 8-SOIC (A6213KLJTR-T), 16-QFN (LT3517EUF#TRPBF), 16-TSSOP (LT3518EFE#PBF), and 12-DSBGA (LM3561TMX/NOPB). Package selection impacts PCB footprint, thermal management, and board space availability.

Q: Which substitute offers the best thermal performance?

A: LT3954IUHE#TRPBF and LT3517EUF#TRPBF both support operating temperatures to 125°C (TJ), compared to the MP3352DQ-LF-P at 85°C (TA). These parts provide superior thermal headroom for high-power LED driver and camera flash applications.

Q: Do all substitutes maintain ROHS3 compliance?

A: Yes, all listed substitute parts are ROHS3 compliant, ensuring compatibility with environmental and regulatory requirements equivalent to the original MP3352DQ-LF-P.

Q: What is the significance of Active product status for substitute selection?

A: All substitute parts carry Active product status, indicating ongoing manufacturing support, long-term availability, and continued design validation by manufacturers. This contrasts with the MP3352DQ-LF-P's "Not For New Designs" status, ensuring supply chain continuity for production and future design iterations.

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