AP3586BMPTR-G1 Equivalent & Substitute Parts

Part Overview

The AP3586BMPTR-G1 is a buck regulator positive output step-down DC-DC controller IC manufactured by Diodes Incorporated in an 8-SOIC package with exposed pad. This component functions as a transistor driver for step-down voltage conversion applications with a single output phase. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

AP3586BMPTR-G1

Diodes IncorporatedIn Stock: 12276AP3586BMPTR-G1 Datasheet

Current PartRFQ

NCP1587EDR2G

onsemiIn Stock: 2030NCP1587EDR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the AP3586BMPTR-G1 are qualified based on the following critical parameters that determine functional compatibility:

• Package compatibility: 8-SOIC form factor with matching pinout and thermal characteristics
• Functional topology: Buck regulator controller with transistor driver output
• Output configuration: Single positive output, single phase
• Supply voltage range: Overlapping or extended input voltage specifications
• Switching frequency: Operating in the same frequency band for circuit timing compatibility
• Synchronous rectification support: Presence of integrated synchronous rectifier functionality
• Control interface: Enable and phase control features
• Thermal operating range: Minimum coverage of -40°C to 85°C
• Regulatory compliance: ROHS3 compliance and equivalent certifications

The NCP1587EDR2G from onsemi meets these substitution criteria with compatible electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The NCP1587EDR2G is a qualified substitute for the obsolete AP3586BMPTR-G1 based on the following engineering criteria:

Functional Equivalence: Both components implement identical buck regulator controller topology with transistor driver output, single positive output configuration, and matching control features (Enable, Phase Control).

Package Compatibility: The 8-SOIC form factor with 0.154" width is mechanically and electrically compatible, allowing direct PCB footprint substitution without layout modifications.

Electrical Parameter Alignment: The NCP1587EDR2G operates within overlapping supply voltage specifications (4.5V ~ 13.2V encompasses the original 5V ~ 12V range) and maintains synchronous rectifier functionality. The switching frequency of 275kHz is within acceptable operational variance from the original 300kHz specification.

Regulatory Compliance: Both components meet ROHS3 compliance requirements and carry equivalent environmental certifications (REACH Unaffected, EAR99 ECCN classification).

Production Status: The NCP1587EDR2G is in active production with confirmed inventory availability, ensuring long-term supply continuity compared to the obsolete AP3586BMPTR-G1.

Temperature Rating Enhancement: The extended operating temperature range of -40°C to 125°C (junction) provides additional thermal margin beyond the original -40°C to 85°C specification.

Frequently Asked Questions (FAQ)

Q: Can the NCP1587EDR2G be used as a direct replacement without circuit modifications?

A: The NCP1587EDR2G is pin-compatible and functionally equivalent for the same 8-SOIC package footprint. However, design validation is required to confirm that the lower maximum duty cycle (75% vs. 82%) and slightly lower switching frequency (275kHz vs. 300kHz) do not impact output voltage regulation or transient response in your specific application circuit.

Q: What is the significance of the extended supply voltage range in the NCP1587EDR2G?

A: The NCP1587EDR2G accepts input voltages from 4.5V to 13.2V, compared to the AP3586BMPTR-G1 range of 5V to 12V. This provides additional design flexibility for applications with variable input sources, though designs originally constrained to 5V ~ 12V operation remain fully compatible.

Q: How does the duty cycle difference affect circuit performance?

A: The maximum duty cycle specification (75% for NCP1587EDR2G vs. 82% for AP3586BMPTR-G1) determines the minimum achievable output voltage relative to input voltage. Applications requiring duty cycles above 75% may experience output voltage regulation limitations with the substitute part and require circuit re-evaluation.

Q: Are there any thermal considerations when substituting these components?

A: The NCP1587EDR2G features an extended junction temperature rating (-40°C to 125°C) compared to the ambient temperature rating of the original part (-40°C to 85°C). Both components use identical 8-SOIC packaging with exposed pad for thermal dissipation, so thermal management requirements remain equivalent.

Q: What is the inventory status of the substitute part?

A: The NCP1587EDR2G is currently in active production with 1996 pieces available in new original condition, packaged in Tape & Reel format. The AP3586BMPTR-G1 is obsolete with 12200 pieces remaining in stock.