LM27213SQ Buck Regulator Controller IC Equivalent & Substitute Parts

Part Overview

The LM27213SQ is a buck regulator positive output step-down DC-DC controller IC manufactured by Texas Instruments in a 48-WQFN (7x7) package with exposed pad. This component functions as a transistor driver for step-down topology applications with a single output phase and integrated synchronous rectifier support.

The LM27213SQ carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active manufacturing support and current compliance certifications.

Substiute Parts

LM27213SQ

Texas InstrumentsIn Stock: 2448LM27213SQ Datasheet

Current PartRFQ

LM27213SQ/NOPB

Texas InstrumentsIn Stock: 1022LM27213SQ/NOPB Datasheet

DirectRFQ

LM27213SQX/NOPB

Texas InstrumentsIn Stock: 1562LM27213SQX/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM27213SQ are determined by strict equivalence across the following critical parameters:

• Manufacturer: Texas Instruments (same manufacturer ensures design compatibility and pin-to-pin compatibility)
• Base Product Number: LM27213 (identical functional core)
• Package / Case: 48-WFQFN Exposed Pad (mechanical and thermal compatibility)
• Voltage Supply Range: 4.75V ~ 6V (identical operating voltage window)
• Output Configuration: Positive, Single Output, Single Phase (functional topology match)
• Control Features: Current Limit, Enable, Power Good, Soft Start (identical feature set)
• Operating Temperature Range: -5°C ~ 105°C (identical thermal operating window)
• Mounting Type: Surface Mount (identical assembly compatibility)

Substitute parts differ only in packaging format (Tape & Reel or Cut Tape & Digi-Reel) and product status (Active vs. Obsolete), with corresponding updates to RoHS compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both LM27213SQ/NOPB and LM27213SQX/NOPB are direct functional equivalents to the obsolete LM27213SQ. Selection between these substitutes is based on supply chain and regulatory requirements:

LM27213SQ/NOPB is supplied in Tape & Reel (TR) format and carries ROHS3 compliance certification. This variant is suitable for high-volume production environments requiring automated assembly and current regulatory compliance.

LM27213SQX/NOPB is supplied in Cut Tape (CT) & Digi-Reel® format and also carries ROHS3 compliance certification. This variant accommodates both manual and automated assembly workflows and provides equivalent regulatory compliance.

Both substitute parts maintain identical electrical performance, thermal characteristics, and control feature sets as the original LM27213SQ. The choice between packaging formats depends on assembly process requirements and inventory management practices.

Frequently Asked Questions (FAQ)

Q: Are LM27213SQ/NOPB and LM27213SQX/NOPB pin-to-pin compatible with the original LM27213SQ?

A: Yes. All three parts share the same base product number (LM27213), identical package type (48-WFQFN Exposed Pad), and identical pin configuration. They are direct pin-to-pin replacements.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® packaging?

A: Tape & Reel (TR) format is optimized for high-speed automated pick-and-place assembly. Cut Tape (CT) & Digi-Reel® format supports both manual component selection and automated assembly, offering greater flexibility for lower-volume or mixed-assembly operations.

Q: Why is the original LM27213SQ marked as obsolete?

A: Product obsolescence typically reflects end-of-life status from the manufacturer. The substitute parts LM27213SQ/NOPB and LM27213SQX/NOPB maintain active product status and current manufacturing support.

Q: Are there compliance differences between the original part and the substitutes?

A: Yes. The original LM27213SQ is RoHS non-compliant. Both substitute parts (LM27213SQ/NOPB and LM27213SQX/NOPB) are ROHS3 compliant. All three parts maintain identical REACH Unaffected status.

Q: Can I use these substitutes in existing designs without circuit modification?

A: Yes. The electrical specifications, control features, voltage supply range, operating temperature range, and package footprint are identical across all three parts. No circuit redesign is required.

Q: What is the Moisture Sensitivity Level (MSL) requirement for storage and handling?

A: All three parts carry MSL 2 (1 Year) rating. Components must be stored in controlled humidity environments and used within one year of the manufacturing date code to maintain solderability specifications.