AP7346D-3330FS6-7 Equivalent & Substitute Parts

Part Overview

The AP7346D-3330FS6-7 is a linear voltage regulator IC from Diodes Incorporated designed for dual-output power management applications. This device provides two fixed output channels at 3V and 3.3V with 130mA per channel, housed in a 6-pin X2-DFN1212-6 package. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring this specific power management topology.

Substiute Parts

AP7346D-3330FS6-7

Diodes IncorporatedIn Stock: 15494AP7346D-3330FS6-7 Datasheet

Current PartRFQ

AP7345D-3330RH4-7

Diodes IncorporatedIn Stock: 774AP7345D-3330RH4-7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The AP7345D-3330RH4-7 qualifies as a direct substitute based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Dual positive fixed-output regulator topology (2 channels)
• Identical fixed output voltages: 3V and 3.3V
• Same input voltage maximum: 5.25V
• Equivalent dropout voltage specification: 0.29V @ 300mA (AP7345) vs. 0.29V @ 120mA (AP7346)
• Same operating temperature range: -40°C to 85°C
• Identical RoHS3 compliance and REACH unaffected status
• Surface mount technology with exposed pad package design

Functional Enhancement: The AP7345D-3330RH4-7 provides increased current output capacity (300mA per channel vs. 130mA per channel), making it suitable for applications requiring higher power delivery while maintaining electrical compatibility with the original design.

Parameter Comparison

Engineering Selection Recommendations

The AP7345D-3330RH4-7 is the qualified substitute for the AP7346D-3330FS6-7. Selection should be based on the following criteria:

Active Product Status: The AP7345D-3330RH4-7 maintains active production status, ensuring long-term availability and supply chain stability compared to the Last Time Buy status of the original part.

Compliance Alignment: Both parts maintain identical RoHS3 compliance and REACH unaffected status, ensuring regulatory requirements are met without modification to existing certifications.

Package Consideration: The substitute uses an 8-pin X2-DFN1612-8 package versus the 6-pin X2-DFN1212-6 original. PCB layout modifications are required to accommodate the larger package footprint and additional pin count.

Current Capacity: The increased output current (300mA vs. 130mA per channel) provides design margin for existing applications and enables support for higher-power load scenarios without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can the AP7345D-3330RH4-7 directly replace the AP7346D-3330FS6-7 without circuit modifications?

A: Electrical substitution is valid due to matching output voltages, input voltage range, and dropout specifications. However, PCB layout modification is mandatory because the substitute uses a different package (8-pin X2-DFN1612-8 vs. 6-pin X2-DFN1212-6). Pin assignments and footprint dimensions differ.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is based on: dual-output positive fixed regulator topology, identical output voltages (3V and 3.3V), matching input voltage maximum (5.25V), equivalent dropout voltage performance, identical operating temperature range (-40°C to 85°C), and matching compliance certifications (RoHS3, REACH unaffected).

Q: Does the higher quiescent current (140 µA vs. 100 µA) affect system design?

A: The 40 µA increase in quiescent current is a minor parameter difference. System impact depends on application duty cycle and power budget requirements. This difference is not a substitution barrier.

Q: Are there pin-to-pin compatibility considerations?

A: No. The packages are different (6-pin vs. 8-pin), so pin-to-pin compatibility does not apply. Complete PCB redesign of the regulator circuit section is required.

Q: What protection features differ between these parts?

A: The AP7346D-3330FS6-7 includes over-current protection, while the AP7345D-3330RH4-7 includes short-circuit protection. Both provide adequate protection for their respective current ratings.