MP3398AGS LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP3398AGS is an active LED driver IC manufactured by Monolithic Power Systems Inc., classified as a Power Management (PMIC) component. This device functions as a 4-output DC-DC controller with step-up (boost) topology, designed for backlight applications requiring analog and PWM dimming control. The part is currently in active production status with 1547 units available in new original inventory. Substitute parts are identified when equivalent electrical and mechanical parameters allow direct functional replacement in the same application circuit.

Substiute Parts

MP3398AGS

Monolithic Power Systems Inc.In Stock: 1585MP3398AGS Datasheet

Current PartRFQ

MP3398LGS

Monolithic Power SystemsIn Stock: 1149MP3398LGS Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MP3398AGS are identified based on strict parametric equivalence across the following critical criteria:

Electrical Parameters (Must Match):

• DC-DC controller topology: Step-Up (Boost)
• Number of outputs: 4
• Output current per channel: 350mA
• Switching frequency: 540kHz
• Dimming capability: Analog and PWM support
• Operating temperature range: -40°C ~ 125°C (TJ)

Mechanical Parameters (Must Match):

• Package type: 16-SOIC
• Physical dimensions: 0.154" width (3.90mm)
• Mounting type: Surface Mount

Supply Voltage Tolerance: The MP3398AGS accepts input supply voltage from 5V to 28V. Substitute parts must support this range or a compatible subset that does not restrict the original application envelope.

Compliance & Certification (Must Match):

• RoHS3 compliance
• MSL rating: 2 (1 Year)

Parameter Comparison

Engineering Selection Recommendations

The MP3398LGS qualifies as a parametric equivalent substitute for the MP3398AGS based on matching electrical topology, output configuration, switching frequency, dimming capability, and thermal operating range. Both parts maintain identical RoHS3 compliance and MSL ratings, ensuring equivalent environmental and regulatory qualification.

The MP3398LGS accepts a minimum supply voltage of 4.5V compared to the MP3398AGS minimum of 5V. This represents an extended lower operating range that does not restrict the original 5V to 28V specification of the MP3398AGS. Designs operating at or above 5V input will function identically with either part.

Both parts are in active production status with current inventory availability, supporting uninterrupted supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the MP3398LGS directly replace the MP3398AGS in existing designs?

A: Yes. The MP3398LGS meets all parametric requirements for direct substitution. Both parts share identical output count (4), current rating (350mA per channel), switching frequency (540kHz), dimming modes (analog and PWM), thermal range (-40°C to 125°C), and package format (16-SOIC). The extended minimum supply voltage specification of the MP3398LGS (4.5V vs. 5V) does not restrict designs already operating at 5V or higher.

Q: Are there any package or pinout differences between these parts?

A: No. Both the MP3398AGS and MP3398LGS use identical 16-SOIC packaging with 0.154" width (3.90mm). No PCB layout modifications are required for substitution.

Q: What is the significance of the supply voltage difference (5V minimum vs. 4.5V minimum)?

A: The MP3398LGS supports operation at lower input voltages (down to 4.5V) while maintaining the same upper limit (28V). This extended range is compatible with all applications designed for the MP3398AGS. If your design operates at 5V or higher, both parts are functionally equivalent.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the MP3398AGS and MP3398LGS are ROHS3 compliant with identical MSL rating of 2 (1 Year), ensuring equivalent environmental qualification and handling requirements.

Q: What applications are these parts suitable for?

A: Both parts are specified for backlight applications requiring multi-channel LED driver control with analog and PWM dimming capability. The 4-output configuration and 350mA per-channel current rating support typical LCD backlight and LED array driving requirements.