AP7346D-1815FS6-7 Equivalent & Substitute Parts

Part Overview

The AP7346D-1815FS6-7 is a linear voltage regulator IC from Diodes Incorporated designed for power management applications. This dual-output positive fixed regulator delivers 130mA per channel with output voltages of 1.5V and 1.8V. The device is currently in Last Time Buy status, indicating end-of-life production. Identifying qualified substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs and long-term product support.

Substiute Parts

AP7346D-1815FS6-7

Diodes IncorporatedIn Stock: 10701AP7346D-1815FS6-7 Datasheet

Current PartRFQ

AP7345D-1815RH4-7

Diodes IncorporatedIn Stock: 896AP7345D-1815RH4-7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP7346D-1815FS6-7 is determined by the following critical parameters:

• Dual-output configuration: Both main and substitute parts must provide two independent regulated outputs
• Fixed output voltage levels: 1.5V and 1.8V outputs must be maintained
• Maximum input voltage: 5.25V maximum input specification
• Output current capability: Minimum 130mA per channel required for functional equivalence
• Operating temperature range: -40°C to 85°C
• Regulatory compliance: ROHS3 and REACH compliance required
• Surface mount packaging: X2-DFN package family

The AP7345D-1815RH4-7 qualifies as a substitute part because it maintains all critical functional parameters while offering enhanced current delivery (300mA per channel) and improved product status (Active vs. Last Time Buy).

Parameter Comparison

Engineering Selection Recommendations

The AP7345D-1815RH4-7 is a qualified substitute for the AP7346D-1815FS6-7 based on the following engineering criteria:

Functional Compatibility: Both devices maintain identical output voltage specifications (1.5V and 1.8V), maximum input voltage (5.25V), and operating temperature range (-40°C to 85°C). The substitute part exceeds the current delivery requirement with 300mA per channel versus the original 130mA specification.

Product Status Advantage: The substitute part holds Active product status, ensuring long-term availability and continued manufacturing support, whereas the main part is designated Last Time Buy with limited future procurement windows.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.

Package Consideration: The substitute part uses an 8-pin X2-DFN1612-8 package versus the 6-pin X2-DFN1212-6 package of the original. PCB layout modification is required to accommodate the larger package footprint and additional pin count.

Enhanced Protection: The substitute part includes short-circuit protection and current-limit control features, providing additional circuit protection compared to over-current protection in the original design.

Frequently Asked Questions (FAQ)

Q: Can the AP7345D-1815RH4-7 directly replace the AP7346D-1815FS6-7 without PCB modifications?

A: No. The substitute part uses a different package (8-pin X2-DFN1612-8 versus 6-pin X2-DFN1212-6). PCB layout changes are required to accommodate the new package footprint and pinout. Pin-to-pin compatibility must be verified against the respective datasheets before implementation.

Q: What are the key differences in electrical performance between these two parts?

A: The primary differences are output current capability (300mA versus 130mA per channel), quiescent current (140 µA versus 100 µA), and protection features (short-circuit protection and current-limit control versus over-current protection). Both parts maintain identical output voltages, input voltage limits, and operating temperature ranges.

Q: Why is the AP7345D-1815RH4-7 recommended as a substitute?

A: The AP7346D-1815FS6-7 is in Last Time Buy status, indicating end-of-life production. The AP7345D-1815RH4-7 is an Active product from the same manufacturer with identical core functionality, higher current capability, and continued manufacturing support, making it suitable for new designs and long-term supply chain continuity.

Q: Are there any compliance or certification differences between these parts?

A: Both parts are ROHS3 compliant and REACH unaffected. No compliance or certification differences exist between the two devices.

Q: What is the impact of the higher quiescent current in the substitute part?

A: The substitute part draws 140 µA quiescent current compared to 100 µA in the original. This 40 µA difference is negligible in most applications but should be evaluated in battery-powered or ultra-low-power designs where quiescent current is a critical design parameter.