MP3304CDD-LF-Z LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP3304CDD-LF-Z is a LED Driver IC manufactured by Monolithic Power Systems Inc., classified as a Power Management PMIC. This device functions as a 1-output DC-DC regulator with Step-Up (Boost) topology, delivering 1.33A switch current at 18V output with PWM dimming capability for backlight applications. The part is marked as "Not For New Designs," indicating obsolescence or end-of-life status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for existing applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	MP3304CDD-LF-Z
Manufacturer	Monolithic Power Systems Inc.
Category	Power Management (PMIC)
Type	DC DC Regulator
Topology	Step-Up (Boost)
Number of Outputs	1
Voltage - Supply (Min)	3V
Voltage - Supply (Max)	6V
Voltage - Output	18V
Current - Output / Channel	1.33A (Switch)
Frequency	2.2MHz
Dimming	PWM
Package / Case	8-TFDFN Exposed Pad
Operating Temperature	-40°C ~ 85°C (TA)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Not For New Designs

Substitute Part Grouping Explanation

Substitution of the MP3304CDD-LF-Z is determined by the following critical parameters:

Primary Substitution Criteria:

DC-DC Regulator topology: Step-Up (Boost) configuration
Output voltage capability: 18V or higher
Switch current rating: 1.33A or higher
Supply voltage range: 3V to 6V input compatibility
Dimming capability: PWM support
Package compatibility: Surface mount with thermal management
Operating temperature range: -40°C to 85°C minimum
RoHS3 compliance and MSL Level 1 rating

Substitute parts are grouped into two categories:

Category 1 - Parametric Equivalents (Same Manufacturer): Parts from Monolithic Power Systems Inc. with identical electrical specifications and package footprint compatibility.

Category 2 - Functional Alternatives (Different Manufacturers): Parts from alternative manufacturers (Diodes Incorporated, Rohm Semiconductor, onsemi, Texas Instruments, Analog Devices Inc.) that meet or exceed the core electrical requirements but may differ in package form factor, current rating, or frequency characteristics.

Parameter Comparison

Part Number	Manufacturer	Topology	Supply Min (V)	Supply Max (V)	Output (V)	Current (A)	Frequency (MHz)	Package	Status
MP3304CDD-LF-Z	MPS	Boost	3	6	18	1.33	2.2	8-TFDFN	Not For New Designs
MP3304CDD-LF-P	MPS	Boost	3	6	18	1.33	2.2	8-TFDFN	Not For New Designs
AP5725WUG-7	Diodes Inc.	Boost	2.7	5.5	26	0.75	1.2	TSOT-23-6	Active
AP5726WUG-7	Diodes Inc.	Boost	2.7	5.5	—	0.75	1.2	TSOT-23-6	Active
BD6071HFN-TR	Rohm Semi.	Boost	2.7	5.5	14	0.035	1	8-HSON	Active
BD60A00NUX-TR	Rohm Semi.	Boost	2.7	5.5	—	0.03	0.6	8-UFDFN	Not For New Designs
FAN5333ASX	onsemi	Boost	1.8	5.5	30	1.5	1.5	SOT-23-5	Active
LM3405AXMY/NOPB	TI	Buck	3	22	—	1	1.6	8-HVSSOP	Active
LT1932ES6#TRPBF	ADI	Boost	1	10	36	0.04	1.2	TSOT-23-6	Active
LT1937ES5#TRPBF	ADI	Boost	2.5	10	36	0.32	1.2	TSOT-23-5	Active
LT3465AES6#TRMPBF	ADI	Boost	2.7	16	30	0.225	2.4	TSOT-23-6	Active

Engineering Selection Recommendations

Direct Parametric Equivalent: MP3304CDD-LF-P is the direct parametric equivalent from Monolithic Power Systems Inc., offering identical electrical specifications and package footprint. This part maintains full design compatibility with existing PCB layouts and schematics. Both parts carry "Not For New Designs" status, indicating similar lifecycle positioning.

Active Status Alternatives for New Designs: For applications requiring active product status and ongoing manufacturer support, the following parts provide functional substitution:

FAN5333ASX (onsemi): Highest current capability (1.5A) among active alternatives, supports 30V output, and offers both analog and PWM dimming. Requires PCB redesign due to SOT-23-5 package format.
LT1937ES5#TRPBF (Analog Devices Inc.): Supports 36V output with 320mA switch current, compatible with 2.5V to 10V input range. TSOT-23-5 package requires layout modification.
LT3465AES6#TRMPBF (Analog Devices Inc.): Delivers 225mA switch current with 30V output capability and 2.4MHz frequency operation. TSOT-23-6 package offers moderate form factor compatibility.
AP5725WUG-7 (Diodes Incorporated): Active product with 750mA current rating and 26V output. TSOT-23-6 package requires PCB redesign.

Compliance Verification: All listed substitute parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage requirements. Operating temperature ranges (-40°C to 85°C) are consistent across all alternatives.

Frequently Asked Questions (FAQ)

Q: Can MP3304CDD-LF-P be used as a direct replacement for MP3304CDD-LF-Z? A: Yes. MP3304CDD-LF-P is a parametric equivalent with identical electrical specifications, output voltage (18V), switch current (1.33A), and package footprint (8-TFDFN). No circuit redesign is required. Both parts share "Not For New Designs" status.

Q: Why do some substitute parts have lower current ratings than the original? A: Parts such as BD6071HFN-TR (35mA) and LT1932ES6#TRPBF (40mA) are designed for lower-power backlight applications. Selection depends on specific LED load requirements. Higher-current alternatives like FAN5333ASX (1.5A) are available for applications requiring the full 1.33A capability.

Q: What is the impact of package differences when substituting parts? A: Package differences (8-TFDFN vs. TSOT-23-6 vs. SOT-23-5) require PCB layout redesign, including trace routing, thermal management pad sizing, and component placement. Electrical functionality remains equivalent if core parameters match. Consult device datasheets for specific thermal and mechanical requirements.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance certification and MSL Level 1 rating, meeting standard environmental and manufacturing requirements.

Q: Which substitute part is recommended for new designs? A: FAN5333ASX (onsemi) is recommended for new designs due to active product status, highest current capability (1.5A), and extended supply voltage range (1.8V to 5.5V). This part exceeds the original MP3304CDD-LF-Z specifications and ensures long-term availability.

Q: Can LM3405AXMY/NOPB replace the MP3304CDD-LF-Z? A: No. LM3405AXMY/NOPB uses Step-Down (Buck) topology, not Step-Up (Boost). This fundamental difference in converter architecture makes it unsuitable for applications requiring voltage step-up from 3-6V input to 18V output.

Q: What is the significance of "Not For New Designs" status? A: This designation indicates the part is in end-of-life phase with limited future availability. Existing inventory may be available, but manufacturer support and long-term supply are not guaranteed. Active-status alternatives should be evaluated for new product development.

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