MP4050AGS-Z Equivalent & Substitute Parts

Part Overview

The MP4050AGS-Z is an LED driver IC manufactured by Monolithic Power Systems Inc., designed for AC DC offline switching applications with step-down (buck) topology. This component integrates an internal switch and operates across a supply voltage range of 4.1V to 5V, making it suitable for general purpose and lighting applications. The device is currently in active production status and carries automotive-grade qualification with full RoHS3 compliance.

Substitute parts are identified when design requirements shift, inventory constraints occur, or application specifications necessitate alternative electrical or mechanical characteristics while maintaining functional compatibility within the LED driver category.

Substiute Parts

MP4050AGS-Z

Monolithic Power Systems Inc.In Stock: 3895MP4050AGS-Z Datasheet

Current PartRFQ

RT8497AGS

Richtek USA Inc.In Stock: 25338RT8497AGS Datasheet

MFR RecommendedRFQ

TPS92314ADR/NOPB

Texas InstrumentsIn Stock: 2105TPS92314ADR/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP4050AGS-Z is determined by the following critical parameters:

Primary Compatibility Criteria:

• Category: Power Management (PMIC) - LED Driver IC
• Type: AC DC Offline Switcher
• Number of Outputs: 1
• Package / Case: 8-SOIC form factor (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Applications: Lighting

Secondary Consideration Parameters:

• Topology (Step-Down Buck preferred, but Flyback topology acceptable with design review)
• Internal Switch presence (Yes preferred for direct replacement)
• Operating Temperature range (must support -40°C minimum)
• RoHS3 Compliance (mandatory for equivalent substitution)

The identified substitute parts RT8497AGS and TPS92314ADR/NOPB share the core LED driver functionality, single-output architecture, and 8-SOIC package footprint. However, each presents distinct electrical characteristics that require application-level evaluation.

Parameter Comparison

Engineering Selection Recommendations

MP4050AGS-Z (Primary Component): Active product status with automotive-grade qualification and MSL-2 moisture sensitivity rating. Recommended for new designs requiring the specified 4.1V to 5V supply range with 22kHz switching frequency. Full temperature range support to 125°C junction temperature and unlimited shelf life under MSL-1 conditions provide design flexibility.

TPS92314ADR/NOPB (Preferred Substitute): Active product status from Texas Instruments with identical operating temperature range (-40°C to 125°C) and superior moisture sensitivity rating (MSL-1). Suitable for applications where supply voltage can accommodate the 13V to 35V input range. Flyback topology requires circuit redesign compared to the buck topology of the primary part. Higher switching frequency range (60kHz to 150kHz) may reduce EMI filtering requirements. Recommended when higher input voltage tolerance is acceptable.

RT8497AGS (Alternative Substitute): Obsolete product status limits suitability for new production designs. Supply voltage range (10V to 30V) overlaps partially with TPS92314ADR/NOPB but does not accommodate the MP4050AGS-Z input specification. Operating temperature maximum of 85°C (ambient) is lower than the primary part's 125°C junction rating. MSL-3 rating requires stricter moisture control during assembly. Not recommended for new designs; consider only for legacy system maintenance where inventory exists.

Frequently Asked Questions (FAQ)

Q: Can RT8497AGS directly replace MP4050AGS-Z in existing designs?

A: No. The RT8497AGS requires a minimum supply voltage of 10V, while the MP4050AGS-Z operates at 4.1V to 5V. Direct substitution would result in circuit malfunction. Additionally, RT8497AGS is obsolete, making it unsuitable for ongoing production.

Q: Is TPS92314ADR/NOPB a pin-compatible replacement?

A: Both parts use the 8-SOIC package with identical physical dimensions (0.154", 3.90mm width). However, topology differences (Flyback vs. Buck) mean pinout and functional behavior differ. PCB layout and external component modifications are required. Consult device datasheets for detailed pin assignments before implementation.

Q: What are the key differences between buck and flyback topologies in these parts?

A: The MP4050AGS-Z uses step-down (buck) topology with an integrated switch, suitable for lower input voltages (4.1V to 5V). The TPS92314ADR/NOPB uses flyback topology without an integrated switch, requiring external switching components and transformer design. Flyback topology accommodates higher input voltages (13V to 35V) and provides galvanic isolation when needed. Topology selection depends on application voltage requirements and isolation needs.

Q: Are all three parts RoHS3 compliant?

A: Yes. MP4050AGS-Z, RT8497AGS, and TPS92314ADR/NOPB all carry ROHS3 Compliant status, meeting lead-free and restricted substance requirements for EU and global markets.

Q: What is the significance of MSL ratings for these components?

A: MSL (Moisture Sensitivity Level) indicates how long a component can be stored in standard conditions before moisture absorption affects solderability. MP4050AGS-Z (MSL-2, 1 Year) and TPS92314ADR/NOPB (MSL-1, Unlimited) offer longer shelf life than RT8497AGS (MSL-3, 168 Hours). For high-volume production with extended storage, MSL-1 rated parts reduce risk of assembly defects.

Q: Which substitute is recommended for new product development?

A: TPS92314ADR/NOPB is the recommended substitute for new designs. It maintains active product status, supports the full -40°C to 125°C temperature range, and carries MSL-1 rating. The higher input voltage range (13V to 35V) provides design flexibility. Flyback topology requires circuit redesign but is well-established for LED driver applications.