AP7346D-1218FS6-7 Equivalent & Substitute Parts

Part Overview

The AP7346D-1218FS6-7 is a linear voltage regulator IC from Diodes Incorporated designed for positive fixed dual-output applications. This device provides two independent 130mA regulated outputs at 1.2V and 1.8V from a maximum input of 5.25V. The part is classified as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring dual-output linear regulation in compact surface-mount packages.

Substiute Parts

AP7346D-1218FS6-7

Diodes IncorporatedIn Stock: 8832AP7346D-1218FS6-7 Datasheet

Current PartRFQ

AP7345D-1218RH4-7

Diodes IncorporatedIn Stock: 810AP7345D-1218RH4-7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP7346D-1218FS6-7 is based on the following critical parameters:

Output voltage levels (1.2V and 1.8V fixed outputs), output current capability, input voltage tolerance (5.25V maximum), dropout voltage performance, operating temperature range (-40°C to 85°C), and surface-mount packaging compatibility.

The AP7345D-1218RH4-7 qualifies as a substitute based on matching output voltage configuration, input voltage specification, operating temperature range, and RoHS3 compliance. The substitute provides higher output current capability (300mA per output versus 130mA), which represents an upward-compatible alternative suitable for designs with increased current requirements while maintaining the same voltage regulation characteristics.

Parameter Comparison

Engineering Selection Recommendations

The AP7345D-1218RH4-7 is suitable as a substitute for the AP7346D-1218FS6-7 in applications where the original part's Last Time Buy status necessitates alternative sourcing. Both devices maintain ROHS3 compliance and identical output voltage specifications. The substitute provides increased output current capacity (300mA versus 130mA per output), making it compatible with designs operating at or below the original part's current ratings.

The substitute operates within the same temperature range and maintains equivalent PSRR performance. The package change from 6-XFDFN to 8-XFDFN requires PCB layout modification. Quiescent current increases from 100 µA to 140 µA, and dropout voltage at maximum current increases for the 1.2V output (0.7V versus 0.5V), which must be evaluated against specific application power budget requirements.

Frequently Asked Questions (FAQ)

Q: Can the AP7345D-1218RH4-7 directly replace the AP7346D-1218FS6-7 without design changes?

A: Direct pin-for-pin replacement is not possible due to package differences (6-XFDFN versus 8-XFDFN). PCB layout and footprint modifications are required. Electrical functionality is compatible for applications operating within the original part's current specifications.

Q: What are the key differences in electrical performance?

A: The substitute provides 300mA per output versus 130mA. Quiescent current increases by 40 µA. Dropout voltage for the 1.2V output increases to 0.7V at maximum current. The 1.8V output maintains 0.39V dropout voltage. Both devices maintain 75dB PSRR at 1kHz.

Q: Is the substitute suitable for applications requiring exactly 130mA output?

A: Yes. The substitute's 300mA capability is upward-compatible with designs requiring 130mA or less per output. Current limiting and enable control features provide additional design flexibility.

Q: What compliance certifications apply to both parts?

A: Both the main part and substitute are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8542.39.0001.

Q: How does the package size change affect thermal performance?

A: The 8-XFDFN package (1.6mm × 1.2mm) is larger than the 6-XFDFN package (1.2mm × 1.2mm), providing increased exposed pad area for improved thermal dissipation. This supports higher current operation without thermal derating concerns.