AP7343-33FS4-7B Equivalent & Substitute Parts

Part Overview

The AP7343-33FS4-7B is a linear voltage regulator IC from Diodes Incorporated, classified as a Power Management (PMIC) component. This device delivers a fixed 3.3V output at 300mA with a maximum dropout voltage of 0.29V at rated current. The part is actively produced and widely stocked (647 pcs available), making it suitable for applications requiring low-dropout regulation in compact surface-mount packages. Substitute parts are identified based on matching electrical specifications, package compatibility, and regulatory compliance status.

Substiute Parts

AP7343-33FS4-7B

Diodes IncorporatedIn Stock: 737AP7343-33FS4-7B Datasheet

Current PartRFQ

AP7341-33FS4-7

Diodes IncorporatedIn Stock: 90152AP7341-33FS4-7 Datasheet

Parametric EquivalentRFQ

AP7341D-33FS4-7

Diodes IncorporatedIn Stock: 33281AP7341D-33FS4-7 Datasheet

Parametric EquivalentRFQ

AP7343D-33FS4-7B

Diodes IncorporatedIn Stock: 61363AP7343D-33FS4-7B Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AP7343-33FS4-7B is determined by the following critical parameters:

• Output voltage specification (3.3V fixed)
• Output current capability (300mA minimum)
• Maximum dropout voltage performance
• Package compatibility (4-XDFN Exposed Pad)
• Regulatory compliance (ROHS3, REACH Unaffected)
• Product status (Active)

The substitute parts identified maintain identical output voltage, current rating, and package specifications. Variations in dropout voltage and quiescent current are noted but do not preclude substitution when the application requirements permit.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain Active product status and ROHS3 compliance, ensuring continued availability and regulatory alignment. The AP7343D-33FS4-7B and AP7343-33FS4-7B are functionally identical with 0.29V maximum dropout voltage. The AP7341-33FS4-7 and AP7341D-33FS4-7 variants feature 0.65V maximum dropout voltage and 50 µA quiescent current, representing a different performance tier within the same package family. Selection between these groups depends on application-specific dropout voltage requirements and power consumption constraints.

Frequently Asked Questions (FAQ)

Q: Can AP7341-33FS4-7 replace AP7343-33FS4-7B directly?

A: Both parts share identical output voltage (3.3V), current rating (300mA), package type (4-XDFN Exposed Pad), and operating temperature range. The AP7341 variant has higher maximum dropout voltage (0.65V vs. 0.29V) and lower quiescent current (50 µA vs. 60 µA). Direct substitution is possible when the application can tolerate the higher dropout voltage specification.

Q: What is the difference between AP7343 and AP7341 series?

A: Both series deliver 3.3V at 300mA in identical packages. The AP7343 series specifies 0.29V maximum dropout voltage, while the AP7341 series specifies 0.65V maximum dropout voltage. The AP7343 series draws 60 µA quiescent current; the AP7341 series draws 50 µA.

Q: Are the "D" suffix variants (AP7343D-33FS4-7B, AP7341D-33FS4-7) interchangeable with non-D versions?

A: Yes. The "D" suffix indicates a different manufacturing process or tape reel configuration but maintains identical electrical specifications and package compatibility. Both versions are electrically equivalent for circuit design purposes.

Q: Do all substitute parts use the same package?

A: Yes. All identified substitutes use the 4-XDFN Exposed Pad package (X2-DFN1010-4), ensuring PCB layout and thermal management compatibility.

Q: Are there inventory considerations for substitution?

A: AP7341-33FS4-7 has the highest stock level (90,100 pcs), followed by AP7343D-33FS4-7B (61,325 pcs) and AP7341D-33FS4-7 (33,180 pcs). The primary part AP7343-33FS4-7B has 647 pcs available.