CS5171GDR8 Equivalent & Substitute Parts

Part Overview

The CS5171GDR8 is a multi-configuration adjustable switching regulator IC from onsemi, designed for buck, boost, flyback, forward converter, and SEPIC topologies. It supports positive or negative output configurations with a 1.5A switch current rating and operates across a 2.7V to 30V input range. The part is classified as obsolete, making identification of suitable alternatives essential for ongoing design support and production continuity.

Substiute Parts

CS5171GDR8

onsemiIn Stock: 2262CS5171GDR8 Datasheet

Current PartRFQ

CS5171GDR8G

onsemiIn Stock: 25411CS5171GDR8G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CS5171GDR8 is determined by strict equivalence across the following critical parameters:

• Base product number (CS5171 series)
• Package type (8-SOIC with identical 0.154" / 3.90mm width)
• Electrical specifications (input voltage range 2.7V–30V, output range 1.28V–40V, 1.5A switch current, 280kHz switching frequency)
• Topology support (multi-configuration: buck, boost, flyback, forward converter, SEPIC)
• Output configuration capability (positive or negative adjustable)
• Operating temperature range (0°C ~ 125°C)

The CS5171GDR8G qualifies as a direct substitute based on identical electrical and mechanical parameters. The primary distinction is packaging format (tape & reel versus bulk) and product lifecycle status.

Parameter Comparison

Engineering Selection Recommendations

The CS5171GDR8G is the direct functional equivalent of the CS5171GDR8. Selection between these parts should be based on the following factors:

Product Lifecycle: The CS5171GDR8 is obsolete, while the CS5171GDR8G carries a Last Time Buy status, indicating limited future availability. For new designs or production continuity, the CS5171GDR8G is the appropriate choice.

Regulatory Compliance: The CS5171GDR8G meets ROHS3 compliance requirements, whereas the CS5171GDR8 is RoHS non-compliant. Applications subject to RoHS regulations must use the CS5171GDR8G.

Packaging Format: The CS5171GDR8G is supplied in tape & reel format, suitable for automated assembly processes. The CS5171GDR8 packaging format is not specified in the provided data. Verify packaging compatibility with your assembly equipment and supply chain requirements.

Electrical Equivalence: Both parts are electrically identical across all specified parameters, including input/output voltage ranges, current ratings, switching frequency, and topology support. Direct schematic and PCB substitution is valid.

Frequently Asked Questions (FAQ)

Q: Can the CS5171GDR8G be used as a direct replacement for the CS5171GDR8 in existing designs?

A: Yes. The CS5171GDR8G is electrically and mechanically equivalent. All electrical parameters, package dimensions, and functional capabilities are identical. Verify that your assembly process supports the tape & reel packaging format of the CS5171GDR8G.

Q: What is the difference between CS5171GDR8 and CS5171GDR8G?

A: The primary differences are product lifecycle status (obsolete versus last time buy), RoHS compliance (non-compliant versus ROHS3 compliant), and packaging format (unspecified versus tape & reel). Electrical and mechanical specifications are identical.

Q: Why is the CS5171GDR8 marked as obsolete?

A: Obsolescence indicates the manufacturer has discontinued active production. The CS5171GDR8G, marked as Last Time Buy, represents the final production run before complete discontinuation of this product line.

Q: Are there any topology or configuration limitations when substituting these parts?

A: No. Both parts support identical topologies (buck, boost, flyback, forward converter, SEPIC) and output configurations (positive or negative adjustable). Substitution does not impose functional restrictions.

Q: What should I verify before implementing the CS5171GDR8G in production?

A: Confirm that your assembly equipment supports 8-SOIC tape & reel packaging. Verify RoHS compliance requirements for your application and supply chain. Confirm input/output voltage ranges and current requirements match your circuit design specifications.