CS5173EDR8 Equivalent & Substitute Parts

Part Overview

The CS5173EDR8 is a multi-configuration adjustable switching regulator IC from onsemi, designed for buck, boost, flyback, forward converter, and SEPIC topologies. It delivers 1.5A output current with adjustable positive or negative output configuration and operates across a 2.7V to 30V input range. The CS5173EDR8 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

CS5173EDR8

onsemiIn Stock: 814CS5173EDR8 Datasheet

Current PartRFQ

CS5173EDR8G

onsemiIn Stock: 4499CS5173EDR8G Datasheet

DirectRFQ

CS5173GDR8G

onsemiIn Stock: 1294CS5173GDR8G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CS5173EDR8 are qualified based on electrical and mechanical parameter equivalence. The following parameters determine substitution eligibility:

• Input voltage range: 2.7V to 30V
• Output voltage range: 1.28V to 40V (Switch)
• Output current: 1.5A (Switch)
• Switching frequency: 560kHz
• Topology support: Buck, Boost, Flyback, Forward Converter, SEPIC
• Output configuration: Positive or Negative adjustable
• Package: 8-SOIC (0.154", 3.90mm Width)
• Mounting type: Surface Mount

The identified substitutes CS5173EDR8G and CS5173GDR8G maintain full electrical equivalence across all critical parameters while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

CS5173EDR8G is the primary substitute for CS5173EDR8. Both parts maintain identical electrical specifications and operating temperature range (-40°C ~ 125°C). CS5173EDR8G is currently in active production status with ROHS3 compliance, addressing the obsolescence of the original part while preserving full functional compatibility.

CS5173GDR8G serves as an alternative substitute with equivalent electrical performance. The operating temperature range is restricted to 0°C ~ 125°C, making it suitable for applications that do not require the extended -40°C minimum temperature specification. CS5173GDR8G is also ROHS3 compliant and actively produced.

For applications requiring the full -40°C to 125°C operating temperature range, CS5173EDR8G is the appropriate selection. For applications with minimum operating temperature at or above 0°C, either CS5173EDR8G or CS5173GDR8G may be selected based on availability and supply chain considerations.

Frequently Asked Questions (FAQ)

Q: Can CS5173EDR8G directly replace CS5173EDR8 in existing designs?

A: Yes. CS5173EDR8G maintains identical electrical specifications, switching frequency, output current rating, voltage ranges, and 8-SOIC package configuration. The parts are pin-compatible and functionally equivalent.

Q: What is the primary difference between CS5173EDR8G and CS5173GDR8G?

A: The operating temperature range differs. CS5173EDR8G operates from -40°C to 125°C, while CS5173GDR8G operates from 0°C to 125°C. Both parts are electrically identical in all other parameters.

Q: Why is CS5173EDR8 marked as obsolete?

A: The CS5173EDR8 has been discontinued by onsemi. CS5173EDR8G and CS5173GDR8G are the active production alternatives that provide equivalent functionality with current RoHS compliance.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both CS5173EDR8G and CS5173GDR8G are ROHS3 compliant, whereas the original CS5173EDR8 is RoHS non-compliant.

Q: Do the substitute parts support the same topologies as the original?

A: Yes. CS5173EDR8G and CS5173GDR8G support buck, boost, flyback, forward converter, and SEPIC topologies with adjustable positive or negative output configuration, identical to the CS5173EDR8.

Q: Is the 8-SOIC package identical across all three parts?

A: Yes. All three parts use the 8-SOIC (0.154", 3.90mm Width) package with identical pinout and mechanical dimensions, ensuring direct PCB compatibility.