AP7346D-3333FS6-7 Equivalent & Substitute Parts

Part Overview

The AP7346D-3333FS6-7 is a linear voltage regulator IC from Diodes Incorporated designed for positive fixed dual-output applications. This device delivers 130mA per output at 3.3V with a maximum dropout voltage of 0.29V at 120mA. The part is classified as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring dual-output 3.3V regulation.

Substiute Parts

AP7346D-3333FS6-7

Diodes IncorporatedIn Stock: 15173AP7346D-3333FS6-7 Datasheet

Current PartRFQ

AP7345D-3333RH4-7

Diodes IncorporatedIn Stock: 722AP7345D-3333RH4-7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP7346D-3333FS6-7 is determined by the following critical parameters:

• Dual-output configuration (2 regulators minimum)
• Fixed 3.3V output voltage on both channels
• Maximum input voltage of 5.25V
• Operating temperature range of -40°C to 85°C
• Surface mount packaging with exposed pad design
• ROHS3 compliance and REACH unaffected status

The AP7345D-3333RH4-7 qualifies as a manufacturer-recommended substitute. While it features a larger package (8-XFDFN versus 6-XFDFN) and higher output current capability (300mA versus 130mA per output), it maintains electrical compatibility across all critical parameters: dual positive fixed 3.3V outputs, identical maximum input voltage, matching dropout voltage characteristics, identical PSRR, and equivalent temperature range. The increased current capacity and enhanced control features (Current Limit, Enable) provide functional superset compatibility.

Parameter Comparison

Engineering Selection Recommendations

The AP7345D-3333RH4-7 is the manufacturer-recommended substitute for the AP7346D-3333FS6-7. Selection of this substitute is supported by:

• Active product status versus Last Time Buy status of the original part
• Full electrical compatibility across all critical voltage and current parameters
• Enhanced protection features (Short Circuit protection in addition to Over Current)
• Higher output current capability (300mA per output) providing design margin
• Identical compliance certifications (ROHS3 Compliant, REACH Unaffected)
• Same operating temperature range and PSRR performance

PCB layout modifications are required due to package change from 6-XFDFN to 8-XFDFN. The substitute part occupies a larger footprint and requires updated land pattern design.

Frequently Asked Questions (FAQ)

Q: Can the AP7345D-3333RH4-7 directly replace the AP7346D-3333FS6-7 without circuit modifications?

A: Electrical substitution is direct. The AP7345D-3333RH4-7 maintains identical output voltage (3.3V dual outputs), input voltage rating (5.25V maximum), dropout voltage performance, and temperature range. However, PCB layout redesign is mandatory due to package size difference (8-XFDFN versus 6-XFDFN). Pin configuration and functionality remain compatible.

Q: What are the key differences between these two parts?

A: The primary differences are output current capacity (300mA versus 130mA per output), package size (8-XFDFN versus 6-XFDFN), quiescent current (140 µA versus 100 µA), and protection features (Short Circuit versus Over Current). The substitute provides higher current capability and enhanced protection.

Q: Is the AP7345D-3333RH4-7 suitable for applications requiring only 130mA per output?

A: Yes. The AP7345D-3333RH4-7 is rated for 300mA per output, making it suitable for applications requiring 130mA or less. The higher current rating provides design margin and does not affect performance at lower current levels.

Q: Are there compliance or certification differences between these parts?

A: Both parts are ROHS3 Compliant and REACH Unaffected. Compliance certifications are equivalent.

Q: What is the impact of the package change on thermal performance?

A: The 8-XFDFN package is larger than the 6-XFDFN package. Thermal characteristics are not provided in the specification data; thermal performance analysis requires detailed datasheet review and thermal modeling for specific application conditions.