AP7343-30FS4-7B Linear Voltage Regulator IC Equivalent & Substitute Parts

Part Overview

The AP7343-30FS4-7B is an active linear voltage regulator IC from Diodes Incorporated, classified as a Power Management (PMIC) component. This positive fixed output regulator delivers 300mA at 3V with a maximum dropout voltage of 0.29V at rated current. The device is housed in a 4-XDFN Exposed Pad surface mount package and includes enable control and over-current protection features. As an active product with full RoHS3 compliance and unlimited moisture sensitivity rating, substitute parts may be required due to inventory constraints, supply chain optimization, or specific application requirements where alternative electrical characteristics are acceptable.

Substiute Parts

AP7343-30FS4-7B

Diodes IncorporatedIn Stock: 53136AP7343-30FS4-7B Datasheet

Current PartRFQ

AP7341-30FS4-7

Diodes IncorporatedIn Stock: 1113AP7341-30FS4-7 Datasheet

Parametric EquivalentRFQ

AP7341D-30FS4-7

Diodes IncorporatedIn Stock: 30141AP7341D-30FS4-7 Datasheet

Parametric EquivalentRFQ

AP7343D-30FS4-7B

Diodes IncorporatedIn Stock: 100482AP7343D-30FS4-7B Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AP7343-30FS4-7B is determined by the following critical parameters:

• Output Voltage: 3V fixed output (non-negotiable)
• Output Current: 300mA rated capacity (non-negotiable)
• Package Type: 4-XDFN Exposed Pad surface mount (non-negotiable for PCB compatibility)
• Input Voltage Range: Maximum 5.25V (non-negotiable)
• Voltage Dropout: Acceptable range based on application requirements
• Quiescent Current: Acceptable range based on power budget requirements
• Control Features: Enable function required
• Protection Features: Over-current protection required
• Compliance: RoHS3 and REACH status alignment

The AP7343-30FS4-7B has two parametric equivalents within the Diodes Incorporated AP734x series that meet all critical substitution criteria. The AP7341 variants differ primarily in dropout voltage and quiescent current specifications, which are secondary parameters that do not affect core functionality in most applications.

Parameter Comparison

Engineering Selection Recommendations

AP7343D-30FS4-7B: This part is electrically identical to the main part number AP7343-30FS4-7B, with matching dropout voltage (0.29V @ 300mA) and quiescent current (60 µA) specifications. The "D" suffix indicates a different manufacturing date code or tape reel configuration. Both parts maintain active product status and full RoHS3 compliance. Selection between AP7343-30FS4-7B and AP7343D-30FS4-7B is based on inventory availability and supply chain requirements, with no functional differences in circuit performance.

AP7341-30FS4-7 and AP7341D-30FS4-7: These parts are parametric equivalents suitable for applications where increased dropout voltage (0.65V @ 300mA) and reduced quiescent current (50 µA) are acceptable trade-offs. The AP7341 variants are appropriate for designs with higher input voltage margins or where lower standby power consumption is prioritized. Both maintain the same output voltage, current rating, package type, and compliance certifications as the main part. The AP7341D-30FS4-7 variant offers the same electrical performance as AP7341-30FS4-7 with alternative packaging or date code designation.

All substitute parts are active products with RoHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can AP7341-30FS4-7 be used as a direct replacement for AP7343-30FS4-7B?

A: AP7341-30FS4-7 is a parametric equivalent, not a direct replacement. The key difference is dropout voltage: AP7341 has 0.65V maximum dropout at 300mA, while AP7343 has 0.29V. If your circuit design includes sufficient input voltage headroom above the 3V output requirement, AP7341 is functionally compatible. If your application operates with minimal input voltage margin, the lower dropout voltage of AP7343 is required.

Q: What is the difference between AP7343-30FS4-7B and AP7343D-30FS4-7B?

A: Both parts have identical electrical specifications: 3V output, 300mA current, 0.29V dropout, and 60 µA quiescent current. The "D" designation typically indicates a different manufacturing batch or tape reel configuration. They are interchangeable from an electrical and functional standpoint.

Q: Are all substitute parts in the same package?

A: Yes. All listed substitute parts use the 4-XDFN Exposed Pad surface mount package. PCB footprint and reflow soldering parameters are identical across all variants, allowing direct board-level substitution without layout modifications.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes. All substitute parts are RoHS3 compliant, REACH unaffected, and carry active product status. Regulatory and environmental compliance is maintained across all equivalent and substitute options.

Q: Which substitute should I select for lowest power consumption?

A: AP7341-30FS4-7 and AP7341D-30FS4-7 offer the lowest quiescent current at 50 µA, compared to 60 µA for AP7343 variants. If standby power consumption is a design priority and your input voltage margin permits the higher 0.65V dropout, AP7341 variants are the appropriate selection.

Q: Can I mix different part numbers in the same production run?

A: AP7343-30FS4-7B and AP7343D-30FS4-7B are electrically identical and can be used interchangeably within the same design. AP7341 variants have different electrical characteristics and should not be mixed with AP7343 variants in the same circuit unless the design has been validated for both dropout voltage specifications.