MP3302DD-LF-Z LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP3302DD-LF-Z is an active 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 single-wire dimming control. The device operates from a 2.5V to 6V supply and delivers up to 1.33A switch current at 36V output, with a switching frequency of 1.3MHz. Currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating, this component is widely stocked (20,100 units available). Equivalent and substitute parts are identified based on matching electrical specifications, topology requirements, and mechanical packaging compatibility to ensure direct functional replacement in backlight LED driver applications.

Substiute Parts

MP3302DD-LF-Z

Monolithic Power Systems Inc.In Stock: 20208MP3302DD-LF-Z Datasheet

Current PartRFQ

MP3302DD-LF-P

Monolithic Power SystemsIn Stock: 2124MP3302DD-LF-P Datasheet

Parametric EquivalentRFQ

ISL97634ART26Z-T

Renesas Electronics CorporationIn Stock: 883ISL97634ART26Z-T Datasheet

MFR RecommendedRFQ

LM3404HVMRX/NOPB

Texas InstrumentsIn Stock: 21600LM3404HVMRX/NOPB Datasheet

MFR RecommendedRFQ

LM3404MAX/NOPB

Texas InstrumentsIn Stock: 30111LM3404MAX/NOPB Datasheet

MFR RecommendedRFQ

LM3555TLE/NOPB

Texas InstrumentsIn Stock: 1701LM3555TLE/NOPB Datasheet

MFR RecommendedRFQ

LT3519EMS-1#PBF

Analog Devices Inc.In Stock: 4129LT3519EMS-1#PBF Datasheet

MFR RecommendedRFQ

LTC3214EDD#PBF

Analog Devices Inc.In Stock: 2012LTC3214EDD#PBF Datasheet

MFR RecommendedRFQ

MIC2289-24YML-TR

Microchip TechnologyIn Stock: 5419MIC2289-24YML-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MP3302DD-LF-Z are classified into two categories based on substitution criteria:

Parametric Equivalent (Direct Replacement): Parts matching all critical electrical and mechanical parameters: step-up (boost) topology, single output, 2.5V–6V input supply range, 36V output voltage, 1.33A switch current, 1.3MHz switching frequency, single-wire dimming control, 8-QFN (2x3) package, and backlight application focus. These parts are functionally interchangeable without circuit modification.

Manufacturer Recommended Alternatives (Functional Substitutes): Parts with compatible topology (step-up boost or multi-topology capable), similar output current capability (500mA–1.33A range), overlapping supply voltage ranges, and equivalent thermal/compliance ratings. These parts may require circuit design review due to differences in output voltage capability, dimming control method, or package form factor, but maintain functional compatibility for backlight LED driver applications.

Key Substitution Parameters:

• Topology: Step-Up (Boost) or multi-topology capable
• Supply Voltage Range: Minimum 2.5V input support
• Output Current: 500mA or greater switch current
• Dimming Control: Single-wire, PWM, or analog dimming
• Package: 8-pin or smaller surface-mount form factor
• Application: Backlight or lighting-focused
• Compliance: ROHS3 compliant, active product status

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalent): MP3302DD-LF-P is the primary parametric equivalent, offering identical electrical specifications and topology. Both parts share the same base product number (MP3302), supply voltage range (2.5V–6V), output voltage (36V), switch current (1.33A), switching frequency (1.3MHz), single-wire dimming control, and 8-QFN (2x3) package. The only difference is packaging format (Cut Tape vs. Digi-Reel). Both maintain ROHS3 compliance and MSL 1 rating. This substitution requires no circuit modification.

Functional Alternatives with Design Review Required:

ISL97634ART26Z-T (Renesas) maintains step-up boost topology and backlight application focus but lacks detailed parametric specifications in the provided data. Renesas classification as manufacturer-recommended alternative indicates functional compatibility, though output voltage and current specifications require verification against application requirements.

LM3404HVMRX/NOPB and LM3404MAX/NOPB (Texas Instruments) employ step-down (buck) topology rather than step-up, fundamentally altering circuit architecture. These are suitable only for applications where input voltage exceeds desired output voltage. Both maintain 1A switch current and automotive-grade thermal performance (-40°C to 125°C). LM3404MAX/NOPB offers superior MSL rating (1 vs. 3) and higher inventory availability (30,100 units).

LM3555TLE/NOPB (Texas Instruments) provides step-up boost topology with 2.5V minimum input support but targets camera flash applications with lower output current (500mA flash mode) and reduced thermal range (-30°C to 85°C ambient). I2C dimming control differs from single-wire requirement.

LT3519EMS-1#PBF (Analog Devices) offers multi-topology capability (SEPIC, buck, boost) with extended supply range (3V–30V) and 750mA switch current. Analog/PWM dimming flexibility supports single-wire implementation. 16-MSOP package requires PCB layout modification. Suitable for designs requiring topology flexibility.

LTC3214EDD#PBF (Analog Devices) employs switched capacitor (charge pump) topology, fundamentally different from inductive boost conversion. Limited to 2.9V–4.5V input range and 500mA output current. Applicable only for low-voltage backlight applications with reduced current requirements.

MIC2289-24YML-TR (Microchip) maintains step-up boost topology with 2.5V–10V input range, 24V output, and 750mA switch current. 1.2MHz switching frequency and analog/PWM dimming control provide close functional alignment. 8-MLF package (2x2) differs from 8-QFN (2x3), requiring PCB footprint verification. Suitable for designs tolerating 24V output instead of 36V.

All substitute parts maintain ROHS3 compliance and active product status. Selection should prioritize MSL rating (1 preferred for unlimited moisture tolerance), thermal range (-40°C to 125°C preferred), and inventory availability for production continuity.

Frequently Asked Questions (FAQ)

Q: Can MP3302DD-LF-P directly replace MP3302DD-LF-Z without circuit modification?

A: Yes. MP3302DD-LF-P is a parametric equivalent with identical electrical specifications, topology, and package. The only difference is packaging format (Cut Tape vs. Digi-Reel). No circuit modification is required.

Q: Why are LM3404 series parts listed as alternatives if they use buck topology instead of boost?

A: LM3404 series parts are manufacturer-recommended alternatives for LED driver applications. Buck topology is suitable for applications where input voltage exceeds desired output voltage. These parts are not direct replacements for boost-topology designs but serve as functional alternatives for different circuit architectures. Circuit redesign is required.

Q: What is the key difference between single-wire dimming and PWM dimming?

A: Single-wire dimming uses a single control signal to modulate LED brightness through frequency or pulse-width variation on one line. PWM dimming uses dedicated pulse-width modulation control. Parts with PWM or analog dimming can often be configured for single-wire operation through external circuitry, but require design verification.

Q: Can LTC3214EDD#PBF replace MP3302DD-LF-Z in a 36V backlight application?

A: No. LTC3214EDD#PBF uses switched capacitor (charge pump) topology with maximum 4.5V input and unspecified output voltage, fundamentally incompatible with 36V output requirement. This part is suitable only for low-voltage backlight applications (typically 5V–12V output range).

Q: What does MSL rating mean for component substitution?

A: Moisture Sensitivity Level (MSL) indicates how long a component can be stored in ambient conditions before requiring baking. MSL 1 (unlimited) allows indefinite storage without special handling. MSL 2–3 require controlled storage and baking before reflow. MP3302DD-LF-Z and most recommended alternatives carry MSL 1, ensuring compatibility with standard manufacturing processes.

Q: Is LM3555TLE/NOPB suitable for backlight applications requiring single-wire dimming?

A: LM3555TLE/NOPB targets camera flash applications with I2C dimming control, not single-wire dimming. While step-up boost topology is compatible, the dimming control method differs fundamentally. This part is not recommended for single-wire dimming backlight designs without significant firmware modification.

Q: How does package form factor affect substitution decisions?

A: Package form factor determines PCB footprint, thermal performance, and manufacturing compatibility. MP3302DD-LF-Z uses 8-QFN (2x3) with exposed pad for thermal dissipation. Alternatives like LM3404 (8-SOIC), LT3519 (16-MSOP), and MIC2289 (8-MLF) require different PCB layouts. Substitution with different packages requires PCB redesign and thermal analysis.

Q: Which substitute part offers the best inventory availability?

A: LM3404MAX/NOPB offers the highest inventory (30,100 units), followed by MP3302DD-LF-Z (20,100 units) and LM3404HVMRX/NOPB (21,570 units). For production continuity, LM3404MAX/NOPB provides supply security, though topology difference requires circuit redesign.

Q: Can MIC2289-24YML-TR replace MP3302DD-LF-Z if the application tolerates 24V instead of 36V output?

A: MIC2289-24YML-TR maintains compatible step-up boost topology, 2.5V minimum input, 750mA switch current, and analog/PWM dimming. However, 24V output differs from 36V specification. Substitution is possible only if the LED string voltage requirement is 24V or lower. Package footprint (8-MLF vs. 8-QFN) requires PCB verification.