AP7343-28FS4-7B Equivalent & Substitute Parts

Part Overview

The AP7343-28FS4-7B is a linear voltage regulator IC from Diodes Incorporated, classified as a Power Management (PMIC) component. This positive fixed output regulator delivers 300mA at 2.8V with a maximum dropout voltage of 0.3V at rated current. The device is currently in active production status and is suitable for applications requiring low-dropout linear regulation in compact surface-mount packages. Substitute parts are identified based on matching electrical specifications, package compatibility, and regulatory compliance to support design flexibility and supply chain continuity.

Substiute Parts

AP7343-28FS4-7B

Diodes IncorporatedIn Stock: 1161AP7343-28FS4-7B Datasheet

Current PartRFQ

AP7341-28FS4-7

Diodes IncorporatedIn Stock: 1144AP7341-28FS4-7 Datasheet

Parametric EquivalentRFQ

AP7341D-28FS4-7

Diodes IncorporatedIn Stock: 125163AP7341D-28FS4-7 Datasheet

Parametric EquivalentRFQ

AP7343D-28FS4-7B

Diodes IncorporatedIn Stock: 400204AP7343D-28FS4-7B Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AP7343-28FS4-7B are identified based on the following critical parameters that determine functional equivalence:

• Output voltage: 2.8V fixed
• Output current capability: 300mA
• Maximum input voltage: 5.25V
• Package: 4-XDFN Exposed Pad (X2-DFN1010-4)
• Mounting type: Surface Mount
• Operating temperature range: -40°C ~ 85°C
• Control features: Enable function
• Protection: Over Current protection
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected

The AP7343-28FS4-7B and AP7343D-28FS4-7B are direct equivalents with identical electrical performance and differ only in packaging format (Tape & Reel versus Cut Tape & Digi-Reel). The AP7341-28FS4-7 and AP7341D-28FS4-7 are parametric equivalents with the same output specifications but feature a higher maximum dropout voltage of 0.65V and lower quiescent current of 50 µA, making them suitable for applications where these trade-offs are acceptable.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain active product status with ROHS3 compliance and REACH unaffected certification, ensuring regulatory alignment with current manufacturing standards.

For applications requiring the lowest dropout voltage specification, the AP7343-28FS4-7B and AP7343D-28FS4-7B are direct electrical equivalents at 0.3V maximum dropout. These parts differ only in packaging format: select AP7343-28FS4-7B for Tape & Reel supply or AP7343D-28FS4-7B for Cut Tape & Digi-Reel supply based on procurement and assembly requirements.

For applications where higher dropout voltage is acceptable, the AP7341-28FS4-7 and AP7341D-28FS4-7 offer lower quiescent current consumption (50 µA versus 60 µA) at the cost of increased dropout voltage (0.65V versus 0.3V). These parts are suitable for battery-powered or low-power applications where quiescent current reduction provides system-level benefits.

All parts share identical package geometry, thermal characteristics, and control feature sets, enabling direct PCB-level substitution within the specified parameter constraints.

Frequently Asked Questions (FAQ)

Q: Can AP7341-28FS4-7 be used as a direct replacement for AP7343-28FS4-7B?

A: The AP7341-28FS4-7 is a parametric equivalent with the same output voltage, current rating, and package. However, it features a higher maximum dropout voltage of 0.65V compared to 0.3V for the AP7343-28FS4-7B. Substitution is valid only if the application circuit design accommodates the higher dropout specification and the lower quiescent current of 50 µA is beneficial or neutral to system performance.

Q: What is the difference between AP7343-28FS4-7B and AP7343D-28FS4-7B?

A: These parts are electrically identical with matching dropout voltage (0.3V) and quiescent current (60 µA). The difference is packaging format: AP7343-28FS4-7B is supplied in Tape & Reel format, while AP7343D-28FS4-7B is supplied in Cut Tape & Digi-Reel format. Selection depends on assembly equipment compatibility and procurement volume requirements.

Q: Are all substitute parts compatible with the same PCB layout?

A: Yes. All substitute parts use the identical 4-XDFN Exposed Pad package (X2-DFN1010-4) with the same pinout, thermal pad configuration, and mounting footprint. PCB layout and thermal design remain unchanged across all listed substitutes.

Q: What are the key parameters that determine substitutability?

A: The critical parameters are output voltage (2.8V fixed), output current (300mA), maximum input voltage (5.25V), package type (4-XDFN Exposed Pad), and operating temperature range (-40°C ~ 85°C). Dropout voltage and quiescent current are secondary parameters that may vary between equivalent parts depending on application requirements.

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

A: Yes. All listed parts are ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic component manufacturing and use in regulated markets.