LM2831YMFX Equivalent & Substitute Parts

Part Overview

The LM2831YMFX is a buck switching regulator IC from Texas Instruments designed for positive adjustable output applications. It delivers 1.5A output current with an adjustable output voltage range from 0.6V to 4.5V, operating from a 3V to 5.5V input supply. The device is housed in an SC-74A (SOT-753) surface mount package and operates across the industrial temperature range of -40°C to 125°C.

The LM2831YMFX carries an obsolete product status. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this regulator topology.

Substiute Parts

LM2831YMFX

Texas InstrumentsIn Stock: 6501LM2831YMFX Datasheet

Current PartRFQ

LM2831YMFX/NOPB

Texas InstrumentsIn Stock: 16994LM2831YMFX/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2831YMFX is determined by strict equivalence across the following critical parameters:

• Function and topology (Step-Down Buck regulator)
• Output configuration (Positive adjustable)
• Input voltage range (3V to 5.5V)
• Output voltage range (0.6V to 4.5V)
• Output current capability (1.5A)
• Switching frequency (550kHz)
• Package type (SC-74A, SOT-753 / SOT-23-5)
• Operating temperature range (-40°C to 125°C)
• Mounting type (Surface Mount)

The LM2831YMFX/NOPB qualifies as a direct substitute based on complete parameter alignment across all electrical and mechanical specifications. The primary distinction is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The LM2831YMFX/NOPB is the direct substitute for the obsolete LM2831YMFX. Both devices share identical electrical specifications and package geometry, ensuring pin-for-pin and functional compatibility.

The LM2831YMFX/NOPB carries active product status from Texas Instruments, providing assured long-term availability and supply chain stability. The device is ROHS3 compliant, meeting current environmental and regulatory requirements for new designs and production.

The primary operational difference is packaging format: the LM2831YMFX/NOPB is supplied in Tape & Reel format, which is standard for automated assembly processes. Both devices maintain MSL 1 (Unlimited) moisture sensitivity classification.

Frequently Asked Questions (FAQ)

Q: Can the LM2831YMFX/NOPB be used as a direct replacement for the LM2831YMFX?

A: Yes. The LM2831YMFX/NOPB is electrically and mechanically identical to the LM2831YMFX. Both devices feature the same input voltage range (3V to 5.5V), adjustable output voltage range (0.6V to 4.5V), 1.5A output current, 550kHz switching frequency, and SC-74A (SOT-753) package. Pin configuration and functional behavior are identical.

Q: What is the difference between the LM2831YMFX and LM2831YMFX/NOPB?

A: The primary differences are product status and packaging format. The LM2831YMFX is obsolete and supplied in bulk packaging. The LM2831YMFX/NOPB is active and supplied in Tape & Reel format. The LM2831YMFX/NOPB also carries ROHS3 compliance, whereas the original part is RoHS non-compliant.

Q: Are there any circuit design changes required when switching from LM2831YMFX to LM2831YMFX/NOPB?

A: No circuit design changes are required. The devices are functionally equivalent with identical electrical characteristics, operating ranges, and pin assignments. Existing PCB layouts and external component configurations remain valid.

Q: What is the significance of the "/NOPB" suffix in the part number?

A: The "/NOPB" suffix indicates the device is supplied in Tape & Reel packaging without plumbum (lead-free). This is the standard packaging format for automated assembly and reflects current manufacturing and environmental compliance standards.

Q: Is the LM2831YMFX/NOPB suitable for new designs?

A: Yes. The LM2831YMFX/NOPB carries active product status and ROHS3 compliance, making it appropriate for new product development. It provides long-term availability and meets current regulatory requirements.