AP3595FNTR-G1 Equivalent & Substitute Parts

Part Overview

The AP3595FNTR-G1 is a Buck Regulator Positive Output Step-Down DC-DC Controller IC manufactured by Diodes Incorporated in a 24-VFQFN Exposed Pad package. This component functions as a transistor driver for step-down voltage regulation with dual output phases. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

AP3595FNTR-G1

Diodes IncorporatedIn Stock: 5271AP3595FNTR-G1 Datasheet

Current PartRFQ

MIC2150YML-TR

Microchip TechnologyIn Stock: 837MIC2150YML-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP3595FNTR-G1 is determined by strict alignment of the following critical parameters:

Functional Requirements:

• Topology: Buck (step-down DC-DC controller)
• Output Configuration: Positive output
• Number of Outputs: 2 phases
• Output Type: Transistor driver

Electrical Compatibility:

• Supply Voltage Range: Must encompass or exceed 10.8V ~ 13.2V
• Switching Frequency: Must support the operational range of 50kHz ~ 1MHz
• Synchronous Rectifier: Required
• Duty Cycle: Must support maximum 40% or higher

Physical & Environmental:

• Package: 24-pin VFQFN with exposed pad (compatible footprint)
• Operating Temperature: Must support -40°C ~ 85°C minimum
• Compliance: ROHS3 compliant, MSL 3 rating

The MIC2150YML-TR meets all substitution criteria through functional equivalence in topology, output configuration, phase count, and package compatibility, while providing enhanced electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

The MIC2150YML-TR is the recommended substitute for the obsolete AP3595FNTR-G1 based on the following engineering criteria:

Functional Equivalence: Both devices implement identical buck topology with dual-phase positive output configuration and transistor driver output type, ensuring direct functional replacement in step-down DC-DC applications.

Electrical Compatibility: The MIC2150YML-TR supply voltage range (4.5V ~ 14.5V) fully encompasses the AP3595FNTR-G1 operating range (10.8V ~ 13.2V). The fixed switching frequency of 500kHz operates within the original device's 50kHz ~ 1MHz range. Enhanced duty cycle capability (80% vs. 40%) and extended operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C) provide additional design margin.

Compliance & Availability: The MIC2150YML-TR maintains ROHS3 compliance and identical MSL 3 rating. As an active product from Microchip Technology, it ensures long-term availability and supply chain continuity, addressing the obsolescence of the original component.

Package Compatibility: Both devices utilize 24-pin VFQFN with exposed pad, ensuring PCB footprint compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the MIC2150YML-TR directly replace the AP3595FNTR-G1 without PCB modifications?

A: Yes. Both devices share identical 24-VFQFN Exposed Pad package geometry. Pin-to-pin compatibility and functional equivalence eliminate the need for PCB layout changes. However, firmware or control signal timing may require validation based on the fixed 500kHz switching frequency of the substitute versus the variable frequency capability of the original.

Q: What is the primary reason for substitution?

A: The AP3595FNTR-G1 is classified as obsolete. The MIC2150YML-TR provides functional equivalence with active product status, ensuring continued availability and supply chain reliability.

Q: Are there differences in control features between the two devices?

A: The AP3595FNTR-G1 includes Enable, Frequency Control, Phase Control, and Soft Start features. The MIC2150YML-TR includes Current Limit, Enable, Power Good, and Soft Start features. Both provide Enable and Soft Start functionality. The substitute adds Power Good output and Current Limit protection, while the original offers external frequency and phase control. System design requirements determine the significance of these differences.

Q: Does the extended operating temperature range of the MIC2150YML-TR affect substitution suitability?

A: No. The extended range (-40°C ~ 125°C vs. -40°C ~ 85°C) provides additional thermal margin and does not create incompatibility. Applications operating within the original temperature specification remain fully supported.

Q: What is the impact of the fixed 500kHz switching frequency on substitution?

A: The original AP3595FNTR-G1 supports variable switching frequency from 50kHz to 1MHz. The MIC2150YML-TR operates at a fixed 500kHz frequency. This fixed frequency falls within the original operating range and is suitable for applications not requiring dynamic frequency adjustment. Systems dependent on external frequency control must evaluate this limitation.

Q: Are packaging and moisture sensitivity considerations identical?

A: Yes. Both devices are specified with MSL 3 (168 Hours) moisture sensitivity level and utilize surface mount technology. Handling, storage, and reflow procedures remain consistent between the two components.