AP7343-22FS4-7B Equivalent & Substitute Parts

Part Overview

The AP7343-22FS4-7B is a linear voltage regulator IC from Diodes Incorporated, classified as a Power Management (PMIC) component. This device delivers a fixed 2.2V output at 300mA with integrated enable control and over-current protection. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or equivalent performance specifications within the allowed electrical and mechanical parameters.

Substiute Parts

AP7343-22FS4-7B

Diodes IncorporatedIn Stock: 94648AP7343-22FS4-7B Datasheet

Current PartRFQ

AP7341-22FS4-7

Diodes IncorporatedIn Stock: 814AP7341-22FS4-7 Datasheet

Parametric EquivalentRFQ

AP7341D-22FS4-7

Diodes IncorporatedIn Stock: 33209AP7341D-22FS4-7 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AP7343-22FS4-7B are identified based on strict electrical and mechanical parameter matching within the allowed tolerances for linear voltage regulator ICs. The substitution criteria are:

Critical Parameters (Must Match Exactly):

• Output voltage: 2.2V fixed
• Output current capability: 300mA
• Package type: 4-XDFN Exposed Pad (X2-DFN1010-4)
• Mounting type: Surface Mount
• Output configuration: Positive
• Control features: Enable function
• Protection features: Over-current protection

Allowable Variation Parameters:

• Voltage dropout: Up to 0.65V @ 300mA (main part: 0.34V)
• Quiescent current: 50-60 µA range
• All substitute parts maintain identical input voltage maximum (5.25V), PSRR (75dB @ 1kHz), operating temperature range (-40°C ~ 85°C), and compliance certifications (RoHS3, REACH Unaffected)

The AP7341-22FS4-7 and AP7341D-22FS4-7 are parametric equivalents sharing the same base product family (AP7341 series) with identical functional specifications and package geometry.

Parameter Comparison

Engineering Selection Recommendations

All three parts—AP7343-22FS4-7B, AP7341-22FS4-7, and AP7341D-22FS4-7—are active production components with identical RoHS3 compliance and REACH unaffected status. Selection between these parts is determined by dropout voltage requirements and inventory availability.

The AP7343-22FS4-7B features a lower maximum dropout voltage of 0.34V @ 300mA, making it suitable for applications with tighter input-to-output voltage margins. The AP7341-22FS4-7 and AP7341D-22FS4-7 both specify 0.65V maximum dropout, acceptable for applications with greater headroom between input and output voltages. All parts maintain identical output voltage regulation, current capacity, package geometry, and thermal operating range. Component selection should prioritize availability and supply chain requirements while confirming dropout voltage compatibility with the target application's input voltage specifications.

Frequently Asked Questions (FAQ)

Q: Can AP7341-22FS4-7 or AP7341D-22FS4-7 be used as direct replacements for AP7343-22FS4-7B?

A: Yes, both parts are parametric equivalents with identical output voltage (2.2V), output current (300mA), package type (4-XDFN Exposed Pad), and operating temperature range. The primary difference is dropout voltage: AP7343-22FS4-7B specifies 0.34V maximum, while AP7341 variants specify 0.65V maximum. Substitution is valid when the application's input voltage margin accommodates the higher dropout specification.

Q: What is the difference between AP7341-22FS4-7 and AP7341D-22FS4-7?

A: Both parts share identical electrical specifications, including 0.65V maximum dropout voltage, 50 µA quiescent current, and 75dB PSRR. The suffix designation indicates different manufacturing or packaging variants within the AP7341 product line, but electrical performance and package geometry remain equivalent.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the 4-XDFN Exposed Pad package (X2-DFN1010-4) with identical pinout and footprint geometry, enabling direct PCB layout compatibility.

Q: What compliance certifications apply to these parts?

A: All three parts are RoHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity rating. ECCN classification is EAR99 for all variants.

Q: How does quiescent current differ between these parts?

A: AP7343-22FS4-7B specifies 60 µA quiescent current, while AP7341-22FS4-7 and AP7341D-22FS4-7 specify 50 µA. This 10 µA difference is negligible in most applications and does not affect substitution suitability.