MP3398BGF-Z LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP3398BGF-Z is an active LED driver controller IC manufactured by Monolithic Power Systems Inc., classified as a Power Management (PMIC) device. This 16-TSSOP surface mount component functions as a 4-output DC-DC step-up (boost) controller with integrated PWM dimming capability, designed for backlight applications. The device operates across a 5V to 28V supply range and delivers 350mA per output channel at a switching frequency of 540kHz. The part maintains active product status and is ROHS3 compliant with REACH unaffected classification. Substitute parts are identified when equivalent electrical and mechanical parameters align with application requirements, enabling component procurement flexibility while maintaining circuit performance specifications.

Substiute Parts

MP3398BGF-Z

Monolithic Power Systems Inc.In Stock: 5464MP3398BGF-Z Datasheet

Current PartRFQ

MP3398AGF-Z

Monolithic Power SystemsIn Stock: 55394MP3398AGF-Z Datasheet

Parametric EquivalentRFQ

ISL97687IBZ

Renesas Electronics CorporationIn Stock: 3782ISL97687IBZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MP3398BGF-Z are identified based on strict alignment of critical electrical and mechanical parameters. The substitution logic follows these key criteria:

Primary Equivalence (Parametric Equivalent): MP3398AGF-Z maintains identical electrical specifications including 4-output topology, 5V-28V supply range, 350mA per-channel current rating, 540kHz switching frequency, and dual analog/PWM dimming capability. The package configuration remains 16-TSSOP with exposed pad. The only variance is packaging format (Cut Tape & Digi-Reel versus Tape & Reel), which does not affect circuit performance. This part is classified as a parametric equivalent.

Secondary Equivalence (Manufacturer Recommended): ISL97687IBZ from Renesas Electronics Corporation provides functional equivalence as a 4-output DC-DC step-up controller with analog and PWM dimming for backlight applications. However, this part introduces parameter deviations that require engineering evaluation: minimum supply voltage increases to 9V (versus 5V), maximum supply voltage extends to 32V (versus 28V), per-channel current output reduces to 160mA (versus 350mA), switching frequency operates across a wider range of 200kHz to 1.2MHz (versus fixed 540kHz), and package format changes to 28-SOIC. These differences classify ISL97687IBZ as a manufacturer-recommended alternative suitable only when application constraints accommodate the specified parameter variations.

Parameter Comparison

Engineering Selection Recommendations

MP3398AGF-Z Selection: This part is the direct parametric equivalent to MP3398BGF-Z and is suitable for direct substitution in all applications. Both parts maintain identical electrical performance specifications and package configuration. Selection between MP3398BGF-Z and MP3398AGF-Z is determined solely by packaging format availability and procurement logistics, as the Cut Tape & Digi-Reel format of MP3398AGF-Z does not affect circuit functionality. Both parts carry active product status, ROHS3 compliance, and equivalent regulatory classification (REACH unaffected, EAR99 ECCN).

ISL97687IBZ Selection: This part is classified as a manufacturer-recommended alternative and is suitable only when application requirements accommodate the specified parameter deviations. The reduced per-channel current output (160mA versus 350mA) and increased minimum supply voltage (9V versus 5V) represent functional constraints that must be evaluated against circuit design specifications. The wider operating temperature range of the main part (-40°C to 125°C junction temperature versus -40°C to 105°C ambient temperature) may be significant for high-temperature applications. The larger 28-SOIC package requires PCB layout modification and increased board space allocation. ISL97687IBZ maintains active product status and equivalent regulatory compliance (ROHS3, REACH unaffected, EAR99 ECCN), supporting its use as an alternative when parameter constraints are acceptable.

Frequently Asked Questions (FAQ)

Q: Can MP3398AGF-Z be used as a direct replacement for MP3398BGF-Z?

A: Yes. MP3398AGF-Z is a parametric equivalent with identical electrical specifications and package configuration. The only difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel), which does not affect circuit performance or PCB assembly compatibility.

Q: What are the key limitations of ISL97687IBZ as a substitute?

A: ISL97687IBZ introduces three significant parameter deviations: (1) minimum supply voltage requirement increases from 5V to 9V, (2) per-channel current output decreases from 350mA to 160mA, and (3) package format changes from 16-TSSOP to 28-SOIC, requiring PCB layout modification. These constraints must be evaluated against specific application requirements before selection.

Q: Is the 28-SOIC package of ISL97687IBZ compatible with existing PCB designs for MP3398BGF-Z?

A: No. The 28-SOIC package (0.295" width, 28 pins) is physically and electrically incompatible with the 16-TSSOP package (0.173" width, 16 pins) of MP3398BGF-Z. PCB redesign is required for ISL97687IBZ implementation, including footprint modification, trace routing, and pin assignment verification.

Q: Are all three parts ROHS3 compliant?

A: Yes. MP3398BGF-Z, MP3398AGF-Z, and ISL97687IBZ are all ROHS3 compliant and REACH unaffected, meeting equivalent environmental and regulatory standards.

Q: What is the impact of ISL97687IBZ's variable switching frequency on circuit design?

A: ISL97687IBZ operates across a frequency range of 200kHz to 1.2MHz, compared to the fixed 540kHz of MP3398BGF-Z. This variable frequency range may affect filter design, EMI characteristics, and power supply stability. Circuit analysis is required to confirm compatibility with existing inductor and capacitor specifications.

Q: Which substitute part should be selected for new designs?

A: MP3398AGF-Z is recommended for new designs requiring direct equivalence to MP3398BGF-Z, as it maintains identical electrical performance and regulatory compliance. ISL97687IBZ should be selected only when application constraints specifically require its parameter characteristics and PCB layout modifications are acceptable.