LM5009MM Buck Switching Regulator IC Equivalent & Substitute Parts

Part Overview

The LM5009MM is a buck switching regulator IC manufactured by Texas Instruments, designed for positive adjustable output applications. This device functions as a step-down converter with a single adjustable output, capable of delivering 150mA from input voltages ranging from 9.5V to 95V, with output voltage adjustable from 2.5V to 85V. The LM5009MM is classified as Last Time Buy, indicating limited availability and the necessity to identify equivalent substitute components for ongoing production and design requirements.

Substiute Parts

LM5009MM

Texas InstrumentsIn Stock: 4374LM5009MM Datasheet

Current PartRFQ

LM5009MM/NOPB

Texas InstrumentsIn Stock: 17391LM5009MM/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM5009MM is determined by strict equivalence across the following critical parameters:

• Input voltage range: 9.5V minimum to 95V maximum
• Output voltage adjustability: 2.5V to 85V range
• Output current capability: 150mA
• Topology: Buck (step-down) switching regulator
• Output configuration: Positive adjustable
• Package: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Mounting type: Surface Mount
• Operating temperature range: -40°C to 125°C (TJ)
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected

The LM5009MM/NOPB is identified as the manufacturer-recommended substitute. This part maintains identical electrical specifications and packaging requirements while offering improved availability status.

Parameter Comparison

Engineering Selection Recommendations

The LM5009MM/NOPB serves as the direct manufacturer-recommended substitute for the LM5009MM. Both parts maintain identical electrical and mechanical specifications, ensuring pin-for-pin and functional compatibility. The LM5009MM/NOPB offers significantly higher inventory availability (17300 units versus 4284 units), making it the preferred selection for new procurement and production planning.

Both parts carry ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements. The /NOPB designation indicates lead-free plating, consistent with modern manufacturing standards. While the LM5009MM/NOPB is marked as Not For New Designs, this classification does not affect its technical suitability as a substitute for existing LM5009MM applications, as the electrical and mechanical parameters remain unchanged.

Frequently Asked Questions (FAQ)

Q: Can the LM5009MM/NOPB be used as a direct replacement for the LM5009MM?

A: Yes. The LM5009MM/NOPB is electrically and mechanically identical to the LM5009MM. Both parts share the same input voltage range (9.5V to 95V), output voltage adjustability (2.5V to 85V), output current (150mA), package type (8-TSSOP, 8-MSOP), and operating temperature range (-40°C to 125°C). No circuit modifications are required.

Q: What does the /NOPB suffix indicate?

A: The /NOPB suffix designates lead-free plating on the component leads, compliant with ROHS3 standards. This is a packaging variant that does not affect electrical performance or functionality.

Q: Why is the LM5009MM classified as Last Time Buy?

A: Last Time Buy status indicates that the manufacturer has discontinued or is discontinuing production of this part number. This classification necessitates identification of substitute components for continued supply chain management and production continuity.

Q: Are there any differences in thermal performance between the LM5009MM and LM5009MM/NOPB?

A: No. Both parts operate across the identical temperature range of -40°C to 125°C (TJ) and share the same thermal characteristics.

Q: What are the critical parameters for substitution compatibility?

A: Substitution compatibility is determined by matching input voltage range (9.5V to 95V), output voltage adjustability (2.5V to 85V), output current (150mA), package type (8-TSSOP, 8-MSOP), and operating temperature range (-40°C to 125°C). All these parameters must remain constant for functional equivalence.

Q: Is the LM5009MM/NOPB suitable for new design implementations?

A: While marked as Not For New Designs, the LM5009MM/NOPB remains technically suitable for applications requiring the specified electrical and mechanical characteristics. Design decisions should be based on application requirements and long-term supply chain considerations.