MP3397ES-LF-Z LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP3397ES-LF-Z is a 4-output LED driver IC with integrated DC-DC step-up (boost) controller, designed for backlight applications. This device operates at 540kHz with PWM dimming capability and supports 350mA per channel output current across a 5V to 28V supply range. The part is classified as "Not For New Designs," making identification of active equivalent alternatives essential for ongoing production and new project development.

Substiute Parts

MP3397ES-LF-Z

Monolithic Power Systems Inc.In Stock: 1005MP3397ES-LF-Z Datasheet

Current PartRFQ

MP3398AGS-Z

Monolithic Power Systems Inc.In Stock: 55506MP3398AGS-Z Datasheet

DirectRFQ

ISL97687IBZ

Renesas Electronics CorporationIn Stock: 3782ISL97687IBZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP3397ES-LF-Z is determined by the following critical parameters:

• Topology: Step-Up (Boost) DC-DC controller architecture
• Output Configuration: 4-output LED driver
• Current Capability: Minimum 350mA per channel
• Supply Voltage Range: Compatibility with 5V to 28V input
• Dimming Method: PWM control support
• Package Compatibility: 16-SOIC form factor preferred; 28-SOIC acceptable with board redesign
• Compliance: ROHS3 compliance required

Two substitute parts meet these criteria with varying degrees of direct compatibility:

Direct Substitute (Same Package): MP3398AGS-Z maintains identical package, topology, output count, and current rating while offering active product status and extended dimming capability (Analog + PWM).

Functional Equivalent (Different Package): ISL97687IBZ provides equivalent topology and 4-output configuration but operates at reduced current per channel (160mA vs. 350mA) and requires 28-SOIC package accommodation.

Parameter Comparison

Engineering Selection Recommendations

MP3398AGS-Z is the primary substitute for MP3397ES-LF-Z. Both parts are manufactured by Monolithic Power Systems Inc. and share identical electrical specifications (350mA per channel, 540kHz operation, 5V to 28V supply range) and package form factor (16-SOIC). The MP3398AGS-Z holds active product status and adds analog dimming capability alongside PWM control. No board redesign is required for this substitution. ROHS3 compliance is maintained.

ISL97687IBZ (Renesas Electronics Corporation) serves as a functional equivalent for applications where current per channel requirements can be reduced to 160mA. This part requires 28-SOIC package accommodation and board layout modification. The operating temperature range is reduced to -40°C to 105°C (TA). The ISL97687IBZ supports variable switching frequency (200kHz to 1.2MHz) and dual dimming modes (Analog + PWM). ROHS3 compliance is maintained. This option is suitable only when current per channel reduction is acceptable.

Frequently Asked Questions (FAQ)

Q: Can MP3398AGS-Z directly replace MP3397ES-LF-Z without board modifications?

A: Yes. Both parts use identical 16-SOIC packaging and share the same pinout, electrical specifications, and supply voltage range. No board redesign is necessary.

Q: What is the primary difference between MP3397ES-LF-Z and MP3398AGS-Z?

A: The MP3398AGS-Z is the active production equivalent. It adds analog dimming capability in addition to PWM dimming. All other electrical and mechanical parameters are identical.

Q: Can ISL97687IBZ replace MP3397ES-LF-Z in existing designs?

A: ISL97687IBZ is a functional equivalent only for applications where output current per channel can be reduced from 350mA to 160mA. The 28-SOIC package requires board redesign. Minimum supply voltage increases from 5V to 9V. This substitution is not suitable for designs requiring full 350mA per channel capability.

Q: Are all three parts ROHS3 compliant?

A: Yes. MP3397ES-LF-Z, MP3398AGS-Z, and ISL97687IBZ are all ROHS3 compliant.

Q: What is the operating temperature difference between these parts?

A: MP3397ES-LF-Z and MP3398AGS-Z operate to 125°C (junction temperature). ISL97687IBZ operates to 105°C (ambient temperature), representing a reduced thermal specification.

Q: Does ISL97687IBZ support the same dimming methods?

A: ISL97687IBZ supports both analog and PWM dimming, providing more flexibility than MP3397ES-LF-Z (PWM only). However, this advantage does not offset the reduced current capability and package change requirements.