AP7343D-32FS4-7B Equivalent & Substitute Parts

Part Overview

The AP7343D-32FS4-7B is a linear voltage regulator IC from Diodes Incorporated, classified as a Power Management (PMIC) component. This device delivers a fixed positive output of 3.2V at 300mA with a maximum dropout voltage of 0.29V at rated current. The part is actively produced and widely available in inventory (1057 pcs in stock), making it suitable for applications requiring low-dropout regulation in compact form factors. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter set.

Substiute Parts

AP7343D-32FS4-7B

Diodes IncorporatedIn Stock: 1131AP7343D-32FS4-7B Datasheet

Current PartRFQ

AP7341-32FS4-7

Diodes IncorporatedIn Stock: 874AP7341-32FS4-7 Datasheet

Parametric EquivalentRFQ

AP7341D-32FS4-7

Diodes IncorporatedIn Stock: 42465AP7341D-32FS4-7 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AP7343D-32FS4-7B are identified based on strict parameter equivalence in the following categories:

Electrical Compatibility Criteria:

• Fixed output voltage of 3.2V
• Output current rating of 300mA
• Maximum input voltage of 5.25V
• Operating temperature range of -40°C ~ 85°C
• Enable control feature and over-current protection

Mechanical Compatibility Criteria:

• Package type: 4-XDFN Exposed Pad
• Mounting type: Surface Mount
• Supplier device package: X2-DFN1010-4

Compliance Criteria:

• RoHS3 compliance
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• REACH Unaffected status

The identified substitutes maintain these core parameters while allowing variation in dropout voltage and quiescent current specifications, which do not affect functional interchangeability in standard applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts—AP7343D-32FS4-7B, AP7341D-32FS4-7, and AP7341-32FS4-7—are actively produced by Diodes Incorporated and maintain full ROHS3 compliance with REACH Unaffected status. Selection between these parts depends on application-specific requirements:

AP7343D-32FS4-7B is the primary choice when minimum dropout voltage (0.29V @ 300mA) is critical for low-input-voltage applications or when power efficiency is a primary design constraint.

AP7341D-32FS4-7 and AP7341-32FS4-7 are functionally equivalent alternatives with higher dropout voltage specifications (0.65V @ 300mA) and lower quiescent current (50 µA vs. 60 µA). These parts are suitable for applications where dropout voltage tolerance is acceptable and reduced standby current is beneficial. AP7341D-32FS4-7 offers significantly higher inventory availability (42,400 pcs) compared to AP7341-32FS4-7 (805 pcs).

All parts share identical package geometry, mounting type, and thermal operating range, ensuring direct mechanical and thermal interchangeability.

Frequently Asked Questions (FAQ)

Q: Can AP7341D-32FS4-7 or AP7341-32FS4-7 be used as direct replacements for AP7343D-32FS4-7B?

A: Yes, both parts are functionally equivalent substitutes. The primary difference is dropout voltage: AP7343D-32FS4-7B specifies 0.29V maximum dropout, while AP7341 variants specify 0.65V maximum dropout. Direct substitution is valid when the application's input voltage margin accommodates the higher dropout specification.

Q: What is the significance of the dropout voltage difference?

A: Dropout voltage determines the minimum input-to-output voltage differential required for proper regulation. The AP7343D-32FS4-7B requires only 0.29V headroom, while AP7341 variants require 0.65V. In applications with tight input voltage budgets, the AP7343D-32FS4-7B provides superior performance.

Q: Are the package and pinout identical across all three parts?

A: Yes. All three parts use the 4-XDFN Exposed Pad package (X2-DFN1010-4 supplier package) with surface mount configuration. Pinout and mechanical dimensions are identical, enabling direct PCB-level substitution without layout modifications.

Q: Do all parts meet the same compliance standards?

A: Yes. All three parts are ROHS3 compliant, REACH Unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating. Compliance certifications are equivalent across the product group.

Q: Which part should be selected for new designs?

A: Selection depends on input voltage availability and power efficiency requirements. For applications with constrained input voltage margins, AP7343D-32FS4-7B is preferred. For applications prioritizing lower quiescent current and where dropout voltage tolerance exists, AP7341D-32FS4-7 or AP7341-32FS4-7 are suitable. Inventory availability should also be considered in procurement planning.