LMS1587IS-3.3 Equivalent & Substitute Parts

Part Overview

The LMS1587IS-3.3 is a linear voltage regulator IC manufactured by Texas Instruments, designed for positive fixed 3.3V output applications requiring 3A current capacity. This Surface Mount device in TO-263 (DDPAK-3) packaging is classified as Last Time Buy, indicating discontinued production status. Identifying equivalent and substitute parts is essential for design continuity, procurement flexibility, and long-term supply chain management.

Substiute Parts

LMS1587IS-3.3

Texas InstrumentsIn Stock: 1655LMS1587IS-3.3 Datasheet

Current PartRFQ

LMS1587IS-3.3/NOPB

Texas InstrumentsIn Stock: 87653LMS1587IS-3.3/NOPB Datasheet

DirectRFQ

LT1117CM-3.3#PBF

Analog Devices Inc.In Stock: 2056LT1117CM-3.3#PBF Datasheet

MFR RecommendedRFQ

LT1117CM-3.3#TRPBF

Analog Devices Inc.In Stock: 1894LT1117CM-3.3#TRPBF Datasheet

MFR RecommendedRFQ

LT1587CM-3.3#PBF

Analog Devices Inc.In Stock: 1120LT1587CM-3.3#PBF Datasheet

MFR RecommendedRFQ

LT1587CM-3.3#TRPBF

Analog Devices Inc.In Stock: 1683LT1587CM-3.3#TRPBF Datasheet

MFR RecommendedRFQ

SPX1587AT-L-3-3/TR

MaxLinear, Inc.In Stock: 22127SPX1587AT-L-3-3/TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LMS1587IS-3.3 are qualified based on the following critical parameters:

• Output Voltage: Fixed 3.3V output
• Output Current Capability: Minimum 3A (equal or greater)
• Package Compatibility: TO-263-4 / D2PAK (3 Leads + Tab) / TO-263AA
• Mounting Type: Surface Mount
• Protection Features: Over Current and Over Temperature protection
• Compliance: ROHS3 Compliant, REACH Unaffected

Substitutes are grouped into two categories:

Category 1: Direct Texas Instruments Equivalent

• LMS1587IS-3.3/NOPB: Identical part with different packaging designation (Active status)

Category 2: Cross-Manufacturer Alternatives

• Analog Devices LT1117CM-3.3 series: 800mA output (lower current rating, suitable for reduced-load applications)
• Analog Devices LT1587CM-3.3 series: 3A output (full current match)
• MaxLinear SPX1587AT-L-3-3/TR: 3A output (full current match)

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: LMS1587IS-3.3/NOPB This Texas Instruments part is the direct equivalent with Active product status, ensuring long-term availability and supply continuity. Electrical and mechanical parameters are identical to the original LMS1587IS-3.3. Both parts are ROHS3 Compliant and REACH Unaffected.

Secondary Recommendation: LT1587CM-3.3#PBF or LT1587CM-3.3#TRPBF Analog Devices LT1587CM-3.3 series provides full 3A output current matching with identical dropout voltage (1.3V @ 3A). These parts are Active status with superior MSL rating (1 vs. 3). Operating temperature range is 0°C ~ 125°C (narrower than original). Maximum input voltage is 7V (lower than original 13V). Suitable for applications within these electrical constraints.

Tertiary Recommendation: SPX1587AT-L-3-3/TR MaxLinear SPX1587AT-L-3-3/TR delivers full 3A output current with improved dropout voltage (1.2V @ 3A). Active product status with -40°C ~ 125°C operating range matching the original. Maximum input voltage is 10V (lower than original 13V). Suitable for applications within this input voltage specification.

Limited Substitution: LT1117CM-3.3#PBF or LT1117CM-3.3#TRPBF Analog Devices LT1117CM-3.3 series provides only 800mA output current, significantly lower than the required 3A. These parts are suitable only for applications with reduced current requirements or as partial substitutes in parallel configurations. Operating temperature range is 0°C ~ 125°C (narrower than original).

Frequently Asked Questions (FAQ)

Q: Can LMS1587IS-3.3/NOPB be used as a direct replacement for LMS1587IS-3.3? A: Yes. Both parts are manufactured by Texas Instruments with identical electrical and mechanical specifications. The /NOPB designation indicates lead-free plating. The primary difference is product status: LMS1587IS-3.3/NOPB is Active, ensuring continued availability.

Q: What is the key difference between LT1587CM-3.3 and LT1117CM-3.3? A: Output current capacity. LT1587CM-3.3 provides 3A output (matching the original), while LT1117CM-3.3 provides only 800mA. Both are Analog Devices products in identical DDPAK-3 packaging. Selection depends on application current requirements.

Q: Can I use SPX1587AT-L-3-3/TR in place of LMS1587IS-3.3? A: Yes, provided your application input voltage does not exceed 10V. The MaxLinear part delivers 3A output with improved dropout voltage (1.2V vs. 1.3V). Operating temperature range (-40°C ~ 125°C) matches the original. Verify input voltage compatibility before substitution.

Q: What does the /TRPBF suffix indicate? A: /TRPBF designates Tape & Reel (TR) packaging with lead-free plating (PBF). This is a packaging and format specification, not an electrical difference. Parts with /TRPBF are suitable for automated assembly processes.

Q: Are all substitute parts ROHS3 Compliant? A: Yes. All listed substitute parts are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Q: What is the impact of different maximum input voltages across substitutes? A: Input voltage rating determines the maximum voltage the regulator can safely accept. LMS1587IS-3.3 accepts up to 13V, while LT1587CM-3.3 accepts up to 7V and SPX1587AT-L-3-3/TR accepts up to 10V. Verify your circuit's input voltage specification before selecting a substitute.

Q: Can LT1117CM-3.3 be used in a 3A application? A: No. LT1117CM-3.3 is rated for 800mA maximum output. Using it in a 3A application will cause thermal shutdown and circuit failure. This part is suitable only for applications requiring 800mA or less.

Q: What is the difference between Tube and Tape & Reel packaging? A: Tube packaging is used for manual assembly and lower-volume applications. Tape & Reel packaging is optimized for automated pick-and-place assembly. Both contain identical components; packaging choice depends on manufacturing process requirements.