SM72485MME/NOPB Equivalent & Substitute Parts

Part Overview

The SM72485MME/NOPB is a buck switching regulator IC from Texas Instruments, part of the SolarMagic™ series. It functions as a step-down converter with positive adjustable output, delivering up to 150mA across a wide input voltage range of 6V to 95V. The device is currently in active production status and is suitable for new designs requiring compact power management solutions in surface mount applications.

Substitute parts become necessary when the primary part experiences supply constraints, when design requirements shift toward alternative topologies, or when inventory availability impacts project timelines. The LM5009MM/NOPB represents a manufacturer-recommended alternative, though it carries a "Not For New Designs" status and requires evaluation of specific parameter differences before implementation.

Substiute Parts

SM72485MME/NOPB

Texas InstrumentsIn Stock: 1129SM72485MME/NOPB Datasheet

Current PartRFQ

LM5009MM/NOPB

Texas InstrumentsIn Stock: 17391LM5009MM/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SM72485MME/NOPB is determined by the following critical parameters:

Core Functional Requirements:

• Topology: Buck (step-down) switching regulator
• Output Configuration: Positive adjustable
• Number of Outputs: Single output
• Current Rating: 150mA minimum
• Package: 8-TSSOP, 8-MSOP form factor

Voltage Compatibility Criteria:

• Input voltage range must encompass or overlap with 6V to 95V
• Output voltage range must support 2.5V to 85V adjustability
• Minimum input voltage may vary between alternatives

Environmental & Compliance Requirements:

• Operating temperature range: -40°C to 125°C
• RoHS3 compliance
• Surface mount capability

The LM5009MM/NOPB qualifies as a substitute based on matching topology, output configuration, current rating, package form factor, temperature range, and compliance certifications. However, the minimum input voltage differs at 9.5V versus 6V, which restricts its use to applications where the input voltage remains above 9.5V.

Parameter Comparison

Engineering Selection Recommendations

SM72485MME/NOPB (Primary Selection)

The SM72485MME/NOPB is the recommended choice for new designs. It maintains active production status, ensuring long-term availability and supply chain stability. The device supports the full input voltage range from 6V, providing maximum flexibility for applications with lower input voltage requirements. ROHS3 compliance and unlimited moisture sensitivity level (MSL 1) confirm suitability for standard manufacturing and storage conditions.

LM5009MM/NOPB (Constrained Substitution)

The LM5009MM/NOPB is available as a substitute only when the SM72485MME/NOPB is unavailable and the application input voltage remains at or above 9.5V. The "Not For New Designs" status indicates this part is in legacy support phase. Use of this substitute requires verification that the minimum input voltage constraint does not compromise system operation. Both parts share identical output current, voltage range (above 9.5V input), package form factor, and compliance certifications, enabling functional equivalence within the stated voltage limitation.

Frequently Asked Questions (FAQ)

Q: Can the LM5009MM/NOPB replace the SM72485MME/NOPB in all applications?

A: No. The LM5009MM/NOPB has a minimum input voltage of 9.5V, compared to 6V for the SM72485MME/NOPB. Substitution is valid only for applications where the input voltage does not fall below 9.5V. Applications requiring operation at input voltages between 6V and 9.5V must use the SM72485MME/NOPB.

Q: What is the significance of the "Not For New Designs" status on the LM5009MM/NOPB?

A: This status indicates the part is in legacy support phase and is not recommended for incorporation into new product designs. It may be used as a temporary substitute when supply constraints affect the primary part, but new designs should prioritize the SM72485MME/NOPB for long-term reliability and availability.

Q: Are the package dimensions identical between these parts?

A: Yes. Both the SM72485MME/NOPB and LM5009MM/NOPB use the 8-TSSOP, 8-MSOP package with 0.118" width and 3.00mm body width. PCB layout and footprints are interchangeable.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both parts are ROHS3 compliant, carry REACH Unaffected status, and share identical EAR99 export classification and HTSUS codes. Moisture sensitivity level is MSL 1 (Unlimited) for both devices.

Q: What is the switching frequency difference between these parts?

A: The SM72485MME/NOPB specifies a switching frequency range of 50kHz to 1.1MHz. The LM5009MM/NOPB does not provide a switching frequency specification in the available data. This parameter should be verified against the LM5009MM/NOPB datasheet before substitution in frequency-sensitive applications.