MP3318GC-Z Equivalent & Substitute Parts

Part Overview

The MP3318GC-Z is an active LED driver IC manufactured by Monolithic Power Systems Inc., classified as a Power Management PMIC. This device functions as a 3-output DC-DC step-up (boost) regulator with integrated PWM dimming capability, designed for backlight applications. The component operates across a 2.7V to 5.5V supply range and delivers 38V output at 50mA per channel with a switching frequency of 475kHz to 1.05MHz. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute components are identified when equivalent functional performance, electrical specifications, and mechanical compatibility can be maintained within the constraints of the application environment.

Substiute Parts

MP3318GC-Z

Monolithic Power Systems Inc.In Stock: 107150MP3318GC-Z Datasheet

Current PartRFQ

TPS61300YFFT

Texas InstrumentsIn Stock: 1342TPS61300YFFT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP3318GC-Z is determined by the following critical parameters: DC-DC regulator topology (step-up/boost configuration), three-channel output architecture, input voltage range compatibility (2.7V to 5.5V minimum overlap), output voltage capability, current delivery per channel, dimming control methodology, package form factor, and active product status with current manufacturing support.

The TPS61300YFFT from Texas Instruments is identified as a substitute component. Both devices share the following core characteristics: step-up (boost) topology, three independent outputs, internal switching capability, surface mount configuration, active production status, and ROHS3 compliance. Both operate within overlapping supply voltage ranges and maintain unlimited moisture sensitivity ratings.

Substitution is valid when the application requirements fall within the intersection of both components' electrical specifications and when the package transition from 12-WLCSP to 20-DSBGA does not present physical or thermal constraints in the target assembly.

Parameter Comparison

Engineering Selection Recommendations

Both the MP3318GC-Z and TPS61300YFFT maintain active production status with current manufacturer support and ROHS3 compliance certification. Selection between these components must be based on specific application requirements that fall within the overlapping parameter ranges.

The MP3318GC-Z is the primary component for applications requiring 38V output voltage, 50mA per-channel current delivery, analog or PWM dimming control, and operation up to 125°C junction temperature. The 12-WLCSP package provides a compact footprint suitable for space-constrained backlight driver applications.

The TPS61300YFFT is suitable as a substitute only when application requirements are compatible with its 5.7V maximum output voltage, 400mA to 800mA per-channel current capability, I2C dimming interface, and maximum operating temperature of 85°C. The larger 20-DSBGA package accommodates higher current delivery and thermal dissipation. Substitution requires verification that the I2C control interface can be integrated into the system architecture and that the 20-pin package footprint is acceptable within the PCB layout constraints.

Frequently Asked Questions (FAQ)

Q: Can the TPS61300YFFT directly replace the MP3318GC-Z in an existing design?

A: Direct replacement is not recommended without design review. The TPS61300YFFT has significantly different output voltage (5.7V vs. 38V), current capability (400mA/800mA vs. 50mA), control interface (I2C vs. Analog/PWM), and package form factor (20-DSBGA vs. 12-WLCSP). These differences require circuit redesign and PCB layout modification.

Q: What are the key electrical differences between these components?

A: The MP3318GC-Z delivers 38V output at 50mA per channel with analog or PWM dimming control. The TPS61300YFFT delivers 5.7V output at 400mA to 800mA per channel with I2C dimming control. The MP3318GC-Z operates up to 125°C junction temperature; the TPS61300YFFT operates up to 85°C ambient temperature. These differences make them suitable for different application classes.

Q: Are both components RoHS compliant?

A: Yes. Both the MP3318GC-Z and TPS61300YFFT are ROHS3 compliant with unlimited moisture sensitivity ratings (MSL 1).

Q: What is the package difference between these parts?

A: The MP3318GC-Z uses a 12-WLCSP (1.3x1.7mm) package with 12 pins. The TPS61300YFFT uses a 20-DSBGA package with 20 pins. The TPS61300YFFT package is larger and accommodates higher current delivery and thermal dissipation requirements.

Q: Can I use the TPS61300YFFT for a backlight application designed for the MP3318GC-Z?

A: Substitution is not feasible for standard backlight applications. The MP3318GC-Z is specifically designed for backlight drivers with 38V output capability. The TPS61300YFFT is designed for camera flash applications with 5.7V output. Output voltage mismatch makes substitution incompatible for backlight use cases.

Q: What is the frequency difference and does it matter?

A: The MP3318GC-Z operates at 475kHz to 1.05MHz; the TPS61300YFFT operates at 1.92MHz. Higher switching frequency in the TPS61300YFFT reduces inductor and capacitor size but may increase EMI considerations. Frequency selection depends on application noise requirements and component availability.

Q: Are both parts currently in production?

A: Yes. Both the MP3318GC-Z and TPS61300YFFT are active products with current manufacturing support from their respective manufacturers.