AP7343-25FS4-7B Equivalent & Substitute Parts

Part Overview

The AP7343-25FS4-7B is a linear voltage regulator IC from Diodes Incorporated, classified as a Power Management (PMIC) component. This positive fixed output regulator delivers 300mA at 2.5V with a maximum dropout voltage of 0.3V at full load current. The device is actively produced and widely stocked, with 1094 units available in inventory. Finding equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and optimize component sourcing across manufacturing environments.

Substiute Parts

AP7343-25FS4-7B

Diodes IncorporatedIn Stock: 1117AP7343-25FS4-7B Datasheet

Current PartRFQ

AP7341-25FS4-7

Diodes IncorporatedIn Stock: 824AP7341-25FS4-7 Datasheet

Parametric EquivalentRFQ

AP7341D-25FS4-7

Diodes IncorporatedIn Stock: 1031AP7341D-25FS4-7 Datasheet

Parametric EquivalentRFQ

AP7343D-25FS4-7B

Diodes IncorporatedIn Stock: 27180AP7343D-25FS4-7B Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AP7343-25FS4-7B is determined by the following critical parameters:

Mandatory Matching Parameters:

• Output voltage: 2.5V fixed
• Output current capability: 300mA
• Maximum input voltage: 5.25V
• Package type: 4-XDFN Exposed Pad (X2-DFN1010-4)
• Mounting type: Surface Mount
• Operating temperature range: -40°C to 85°C

Allowable Variation Parameters:

• Maximum dropout voltage: Up to 0.65V @ 300mA (main part specifies 0.3V)
• Quiescent current: 50 µA to 60 µA
• PSRR: 75dB (1kHz)

The substitute parts AP7341-25FS4-7, AP7341D-25FS4-7, and AP7343D-25FS4-7B meet all mandatory matching criteria. The AP7341 variants exhibit higher dropout voltage (0.65V) and lower quiescent current (50 µA) compared to the main part, but remain functionally compatible within the specified electrical and mechanical constraints.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are active products from Diodes Incorporated with ROHS3 compliance and REACH unaffected status, matching the regulatory posture of the main part AP7343-25FS4-7B.

AP7343D-25FS4-7B is the direct functional equivalent, offering identical dropout voltage (0.3V) and quiescent current (60 µA) specifications. This part carries the highest inventory availability at 27,100 units, making it the preferred choice for supply chain continuity and long-term sourcing stability.

AP7341-25FS4-7 and AP7341D-25FS4-7 are compatible alternatives with acceptable parameter variations. These parts feature higher dropout voltage (0.65V) and lower quiescent current (50 µA). Selection of these variants is appropriate when dropout voltage tolerance permits or when lower quiescent current is advantageous for power budget optimization. Both parts maintain full compliance with the same regulatory certifications.

Frequently Asked Questions (FAQ)

Q: Can AP7341-25FS4-7 replace AP7343-25FS4-7B directly?

A: Yes, within design constraints. Both parts deliver 300mA at 2.5V in the same 4-XDFN package. The primary difference is dropout voltage: AP7341 specifies 0.65V maximum versus 0.3V for AP7343. If your input voltage margin accommodates the higher dropout, substitution is valid. Quiescent current is lower in AP7341 (50 µA vs. 60 µA), which may benefit low-power applications.

Q: What is the difference between AP7343-25FS4-7B and AP7343D-25FS4-7B?

A: These parts are electrically and mechanically identical. The "D" designation indicates a different manufacturing date code or production batch. Both deliver 0.3V dropout voltage and 60 µA quiescent current. Selection between them depends on inventory availability and supply chain requirements.

Q: Are all substitute parts in the same package?

A: Yes. All listed parts use the 4-XDFN Exposed Pad package (X2-DFN1010-4) with surface mount configuration. PCB layout and footprint compatibility is maintained across all substitutes.

Q: What happens if I use AP7341 with higher dropout voltage in my design?

A: Higher dropout voltage reduces the minimum input voltage required to maintain regulated output. If your input voltage is 5.25V and you need 2.5V output, AP7341 requires 3.15V minimum input (2.5V + 0.65V), while AP7343 requires 2.8V minimum input (2.5V + 0.3V). Verify your input voltage margin before selecting AP7341 variants.

Q: Are all parts RoHS and REACH compliant?

A: Yes. All listed parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the main part.