MP3305DD-LF-Z Equivalent & Substitute Parts

Part Overview

The MP3305DD-LF-Z is an LED Driver IC manufactured by Monolithic Power Systems Inc., classified as a Power Management (PMIC) component. This device functions as a 1-output DC-DC regulator with Step-Up (Boost) topology, delivering 1.33A switch current at 2.2MHz PWM frequency for backlight applications. The part is currently in Active product status with 18,461 units in stock inventory. Alternative parts are necessary when the original component becomes unavailable, when packaging requirements differ, or when design specifications require different electrical parameters such as supply voltage ranges or output current capabilities.

Key Parameters

Parameter	Value
Manufacturer Part Number	MP3305DD-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)	2.5V
Voltage - Supply (Max)	6V
Voltage - Output	36V
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
Product Status	Active

Substitute Part Grouping Explanation

Substitution logic for the MP3305DD-LF-Z is determined by the following critical parameters:

Topology Match: All substitute parts must maintain Step-Up (Boost) topology to preserve circuit functionality.

Output Configuration: Single output requirement must be maintained across all alternatives.

Electrical Compatibility: Supply voltage range (2.5V–6V minimum), output voltage (36V), and switch current (1.33A) define the primary substitution boundary. Parts with different supply ranges or output currents fall outside direct substitution.

Dimming Control: PWM dimming capability is required for backlight applications.

Package Compatibility: 8-QFN (2x3) package with exposed pad is the standard form factor. Packaging variants (Tape & Reel vs. other formats) do not affect electrical substitution but affect procurement and handling.

Compliance & Status: Active product status is preferred; parts marked "Not For New Designs" are acceptable only when supply constraints exist.

Parametric equivalents (MP3304ADD-LF-P, MP3304ADD-LF-Z, MP3305DD-LF-P) share identical topology, output configuration, and package but may differ in supply voltage minimums or product status. Manufacturer-recommended alternatives (A6213KLJTR-T, ADP1650ACBZ-R7, AP5725WG-7, AP5726WG-7, BD60910GU-E2, LM3414MRX/NOPB, LM3530TME-40/NOPB) represent functional alternatives with different topologies, packages, or current ratings suitable for specific design constraints.

Parameter Comparison

Parameter	MP3305DD-LF-Z	MP3304ADD-LF-P	MP3304ADD-LF-Z	MP3305DD-LF-P	LM3530TME-40/NOPB	AP5725WG-7	AP5726WG-7
Topology	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)
Voltage - Supply (Min)	2.5V	3V	3V	2.5V	2.7V	2.7V	2.7V
Voltage - Supply (Max)	6V	6V	6V	6V	5.5V	5.5V	5.5V
Voltage - Output	36V	36V	36V	36V	40V	26V	Not Specified
Current - Output / Channel	1.33A (Switch)	1.33A (Switch)	1.33A (Switch)	1.33A (Switch)	30mA	750mA (Switch)	750mA (Switch)
Frequency	2.2MHz	2.2MHz	2.2MHz	2.2MHz	500kHz	1.2MHz	1.2MHz
Dimming	PWM	PWM	PWM	PWM	PWM	PWM	PWM
Package / Case	8-TFDFN Exposed Pad	8-TFDFN Exposed Pad	8-TFDFN Exposed Pad	8-TFDFN Exposed Pad	12-WFBGA, DSBGA	SOT-23-6	SOT-23-6
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Product Status	Active	Not For New Designs	Not For New Designs	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Parametric Equivalents (Preferred for Pin-Compatible Substitution):

MP3305DD-LF-P is the closest direct equivalent, maintaining identical electrical specifications and package form factor while differing only in packaging format (Tape & Reel vs. standard). This part is Active status and suitable for new designs.

MP3304ADD-LF-Z and MP3304ADD-LF-P are parametric equivalents with identical topology, output voltage, current rating, and frequency. Both are marked "Not For New Designs" but remain electrically compatible. The supply voltage minimum is 3V instead of 2.5V, which may restrict operation in lower-voltage applications.

Functional Alternatives (Different Packages or Current Ratings):

LM3530TME-40/NOPB maintains Step-Up topology and PWM dimming but operates at lower current (30mA) and different package (12-DSBGA). Suitable only for lower-power backlight applications.

AP5725WG-7 and AP5726WG-7 are Step-Up regulators with reduced switch current (750mA) and different packages (SOT-23-6). These are suitable for applications requiring lower output current and compact form factors.

Selection Criteria:

For direct replacement in existing designs, select MP3305DD-LF-P (Active status, identical specifications, Tape & Reel packaging).

For new designs requiring the same electrical performance, MP3305DD-LF-Z remains the primary choice due to Active product status and full specification match.

All substitute parts maintain ROHS3 compliance and operating temperature range (-40°C ~ 85°C).

Frequently Asked Questions (FAQ)

Q: Can MP3304ADD-LF-Z replace MP3305DD-LF-Z directly?

A: MP3304ADD-LF-Z is electrically compatible in most applications. Both share identical topology, output voltage (36V), switch current (1.33A), frequency (2.2MHz), and package (8-QFN 2x3). The key difference is the minimum supply voltage: MP3304ADD-LF-Z requires 3V minimum versus 2.5V for MP3305DD-LF-Z. If your application operates above 3V, substitution is valid. MP3304ADD-LF-Z is marked "Not For New Designs," so use only when supply constraints exist.

Q: What is the difference between MP3305DD-LF-Z and MP3305DD-LF-P?

A: These parts are electrically identical. The difference is packaging format: MP3305DD-LF-Z is supplied in standard packaging, while MP3305DD-LF-P is supplied in Tape & Reel (TR) format. Both maintain the same 8-QFN (2x3) package case and all electrical specifications. Selection depends on procurement and assembly requirements.

Q: Can I use LM3530TME-40/NOPB as a substitute?

A: LM3530TME-40/NOPB maintains Step-Up topology and PWM dimming but is not a direct equivalent. The switch current is significantly lower (30mA vs. 1.33A), the package is different (12-DSBGA vs. 8-QFN), and the frequency is lower (500kHz vs. 2.2MHz). This part is suitable only for low-power backlight applications and requires circuit redesign.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed—MP3305DD-LF-Z, MP3304ADD-LF-P, MP3304ADD-LF-Z, MP3305DD-LF-P, LM3530TME-40/NOPB, AP5725WG-7, and AP5726WG-7—are ROHS3 compliant and REACH unaffected.

Q: What does "Not For New Designs" mean for MP3304ADD-LF-Z?

A: "Not For New Designs" indicates the manufacturer has discontinued active development and recommends against using this part in new product designs. However, it remains functionally available and electrically compatible. Use only when existing inventory is available or when supply of the primary part (MP3305DD-LF-Z) is constrained.

Q: Can I substitute based on package type alone?

A: No. Package compatibility is necessary but not sufficient for substitution. Electrical parameters—topology, supply voltage range, output voltage, switch current, and dimming method—must also match or be compatible with your circuit design. AP5725WG-7 and AP5726WG-7, for example, use different packages (SOT-23-6) and have lower current ratings (750mA), making them unsuitable for applications requiring 1.33A output.

Q: What is the operating temperature range for all listed parts?

A: All parts operate across -40°C to 85°C (TA), meeting industrial and commercial temperature requirements. This specification is consistent across MP3305DD-LF-Z, MP3304ADD-LF-P, MP3304ADD-LF-Z, MP3305DD-LF-P, LM3530TME-40/NOPB, AP5725WG-7, and AP5726WG-7.

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