LM2586S-3.3 Equivalent & Substitute Parts

Part Overview

The LM2586S-3.3 is a switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for boost, flyback, and forward converter topologies. It delivers a fixed 3.3V output at 3A (switch) with an input voltage range of 4V to 40V and operates across -40°C to 125°C. The device is packaged in TO-263-8 (D2PAK with 7 leads plus tab) surface mount configuration.

The LM2586S-3.3 carries an Obsolete product status. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term production requirements for applications currently utilizing this component.

Substiute Parts

LM2586S-3.3

Texas InstrumentsIn Stock: 3067LM2586S-3.3 Datasheet

Current PartRFQ

LM2586S-3.3/NOPB

Texas InstrumentsIn Stock: 641LM2586S-3.3/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2586S-3.3 is determined by strict equivalence across the following critical parameters:

• Fixed output voltage of 3.3V
• Output current capability of 3A (switch)
• Input voltage range of 4V to 40V
• Switching frequency range of 100kHz to 200kHz
• Topology support: Boost, Flyback, Forward Converter
• Package configuration: TO-263-8 (D2PAK with 7 leads plus tab)
• Surface mount mounting type
• Operating temperature range: -40°C to 125°C
• Moisture sensitivity level: 3 (168 Hours)

Only parts meeting all these specifications are classified as direct substitutes. Variations in any parameter disqualify a part from this equivalence group.

Parameter Comparison

Engineering Selection Recommendations

The LM2586S-3.3/NOPB is a direct electrical and mechanical equivalent to the LM2586S-3.3. Both parts share identical electrical specifications, topology support, and physical packaging.

The primary distinction is product status and regulatory compliance. The LM2586S-3.3/NOPB carries Active product status, ensuring ongoing manufacturer support and availability. Additionally, the LM2586S-3.3/NOPB meets ROHS3 compliance requirements, whereas the original LM2586S-3.3 is RoHS non-compliant.

For new designs or production requiring regulatory compliance with modern environmental standards, the LM2586S-3.3/NOPB is the appropriate selection. For legacy applications where RoHS compliance is not mandated, either part satisfies the electrical requirements.

Frequently Asked Questions (FAQ)

Q: Can the LM2586S-3.3/NOPB replace the LM2586S-3.3 in existing designs?

A: Yes. Both parts are electrically and mechanically identical. They share the same output voltage (3.3V), output current (3A), input voltage range (4V to 40V), switching frequency (100kHz to 200kHz), topology support, and TO-263-8 package configuration. No circuit modifications are required.

Q: What does the "/NOPB" suffix indicate?

A: The "/NOPB" suffix denotes lead-free (no lead) packaging and RoHS3 compliance. This is a packaging and regulatory designation, not a functional difference.

Q: Why is the original LM2586S-3.3 marked as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued active production and support. The LM2586S-3.3/NOPB remains in active production and is the recommended source for new procurement.

Q: Are there differences in thermal performance between these parts?

A: No. Both parts operate across the same temperature range (-40°C to 125°C junction temperature) and share identical thermal characteristics and moisture sensitivity level (MSL 3, 168 hours).

Q: Can these parts be used interchangeably on the same PCB?

A: Yes. Both parts use the same TO-263-8 (D2PAK with 7 leads plus tab) surface mount package. PCB footprints, land patterns, and assembly processes are identical.