AP7340D-185FS4-7 Equivalent & Substitute Parts

Part Overview

The AP7340D-185FS4-7 is a linear voltage regulator IC from Diodes Incorporated designed for positive fixed output applications. This device delivers 150mA output current at a fixed 1.85V output voltage with a maximum dropout voltage of 0.42V at rated current. The part is currently in active production status with 996 units available in inventory.

Substitute parts become necessary when the original component reaches end-of-life status, when supply constraints occur, or when design requirements call for enhanced performance characteristics such as higher output current capacity or improved thermal management.

Substiute Parts

AP7340D-185FS4-7

Diodes IncorporatedIn Stock: 1082AP7340D-185FS4-7 Datasheet

Current PartRFQ

BU1JUA3WNVX-TL

ROHM SemiconductorIn Stock: 914BU1JUA3WNVX-TL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AP7340D-185FS4-7 is determined by the following critical parameters:

• Output voltage matching at 1.85V fixed output
• Output current capability of minimum 150mA
• Maximum input voltage of 5.25V or higher
• Surface mount packaging in 4-pin DFN or equivalent form factor
• Operating temperature range of -40°C to 85°C or wider
• RoHS3 compliance and REACH unaffected status

The substitute part BU1JUA3WNVX-TL from ROHM Semiconductor meets these criteria with enhanced specifications including 300mA output current capacity and improved dropout voltage performance of 0.32V at rated current.

Parameter Comparison

Engineering Selection Recommendations

The AP7340D-185FS4-7 maintains active product status with full manufacturing support. For applications requiring continued supply of this specific part, the original component is the preferred selection.

The BU1JUA3WNVX-TL substitute is classified as "Not For New Designs" by ROHM Semiconductor. This designation indicates the part is available for existing designs but is not recommended for new product development. Both parts maintain ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements.

Selection between these parts depends on design phase and supply availability. Existing designs currently using the AP7340D-185FS4-7 may continue with the original part. Designs requiring higher output current capacity (300mA versus 150mA) or improved dropout voltage performance may evaluate the BU1JUA3WNVX-TL, with consideration given to its "Not For New Designs" status and the minor differences in package footprint between 4-XDFN and 4-UDFN variants.

Frequently Asked Questions (FAQ)

Q: Can BU1JUA3WNVX-TL be used as a direct replacement for AP7340D-185FS4-7?

A: Both parts deliver 1.85V fixed output voltage and operate within the same temperature range. The substitute provides higher output current (300mA versus 150mA) and lower dropout voltage. Package footprints differ slightly (4-XDFN versus 4-UDFN), requiring PCB layout verification before substitution.

Q: What are the key differences between these regulators?

A: The primary differences are output current capacity (150mA main part, 300mA substitute), dropout voltage (0.42V versus 0.32V), maximum input voltage (5.25V versus 5.5V), and protection features. The substitute includes over-temperature protection in addition to over-current protection.

Q: Why is the substitute marked "Not For New Designs"?

A: This designation from ROHM Semiconductor indicates the part is in mature or declining production phase. It remains available for existing designs but is not recommended for new product development. New designs should prioritize the AP7340D-185FS4-7 or evaluate other active-status alternatives.

Q: Are there package compatibility concerns?

A: The main part uses 4-XDFN packaging while the substitute uses 4-UDFN packaging. Both are 4-pin DFN variants with exposed pads in similar physical dimensions. PCB footprint verification is required before substitution to ensure pad alignment and thermal performance.

Q: Do both parts meet current compliance requirements?

A: Yes. Both the AP7340D-185FS4-7 and BU1JUA3WNVX-TL are ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic components.