AP7346D-1833FS6-7 Equivalent & Substitute Parts

Part Overview

The AP7346D-1833FS6-7 is a linear voltage regulator IC from Diodes Incorporated designed for dual-output power management applications. This device provides positive fixed outputs at 1.8V and 3.3V with 130mA per channel, housed in a 6-pin X2-DFN1212-6 surface mount package. The part is classified as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term product availability for applications requiring dual-rail voltage regulation.

Substiute Parts

AP7346D-1833FS6-7

Diodes IncorporatedIn Stock: 5774AP7346D-1833FS6-7 Datasheet

Current PartRFQ

AP7345D-1833RH4-7

Diodes IncorporatedIn Stock: 5748AP7345D-1833RH4-7 Datasheet

MFR RecommendedRFQ

AP7346D-3318FS6-7

Diodes IncorporatedIn Stock: 15702AP7346D-3318FS6-7 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AP7346D-1833FS6-7 are classified based on functional equivalence and design compatibility. The primary substitution criteria are:

Electrical Compatibility Parameters:

• Dual positive fixed output configuration at 1.8V and 3.3V
• Maximum input voltage of 5.25V
• Operating temperature range of -40°C ~ 85°C
• ROHS3 compliance and MSL Level 1 rating

Substitution Categories:

MFR Recommended Substitute (AP7345D-1833RH4-7): This part maintains identical output voltages (1.8V, 3.3V) and input specifications but increases output current capability to 300mA per channel. The package changes from 6-pin to 8-pin X2-DFN1612-8, and the product status is Active. This substitute is suitable for applications requiring higher current delivery while maintaining the same voltage rails.

Parametric Equivalent (AP7346D-3318FS6-7): This part shares the identical package (6-XFDFN), pin count, and electrical performance characteristics as the main part. The primary difference is output voltage configuration (1.8V, 3.3V vs. alternative rails), making it a direct parametric match for applications with different voltage requirements but identical form factor and current specifications.

Parameter Comparison

Engineering Selection Recommendations

For Direct Form Factor Replacement: Select AP7346D-3318FS6-7 when PCB layout and package footprint constraints require a 6-pin X2-DFN1212-6 device. This parametric equivalent maintains identical electrical performance and package dimensions, enabling direct substitution without PCB redesign.

For Increased Current Capacity: Select AP7345D-1833RH4-7 when application requirements demand higher output current (300mA per channel vs. 130mA). This MFR-recommended substitute requires PCB layout modification to accommodate the 8-pin X2-DFN1612-8 package but provides Active product status and extended supply availability.

Supply Chain Continuity: The AP7346D-1833FS6-7 carries Last Time Buy status. For new designs or long-term production, AP7345D-1833RH4-7 is the preferred choice due to Active product status and manufacturer support. Both substitute parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring regulatory and environmental compatibility with the original specification.

Frequently Asked Questions (FAQ)

Q: Can AP7345D-1833RH4-7 be used as a direct replacement for AP7346D-1833FS6-7?

A: AP7345D-1833RH4-7 is functionally compatible but requires PCB layout modification. The package changes from 6-pin X2-DFN1212-6 to 8-pin X2-DFN1612-8, necessitating footprint redesign. Output voltages (1.8V, 3.3V) and input specifications remain identical. Higher current capability (300mA vs. 130mA) makes this suitable for applications with increased power demands.

Q: What is the difference between AP7346D-3318FS6-7 and AP7346D-1833FS6-7?

A: Both parts share identical package, pin count, and electrical performance. The primary difference is output voltage configuration. AP7346D-3318FS6-7 provides alternative voltage rails while maintaining the same form factor and current specifications (130mA per channel). This enables direct PCB substitution for applications with different voltage requirements.

Q: Why is AP7346D-1833FS6-7 marked as Last Time Buy?

A: Last Time Buy status indicates the manufacturer is discontinuing this product line. Existing inventory remains available, but no future production is planned. For new designs or long-term production requirements, AP7345D-1833RH4-7 (Active status) is recommended to ensure sustained supply chain support.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. AP7346D-1833FS6-7, AP7345D-1833RH4-7, and AP7346D-3318FS6-7 are all ROHS3 compliant with MSL Level 1 rating, meeting environmental and regulatory requirements for industrial and commercial applications.

Q: What are the quiescent current differences between substitutes?

A: AP7346D-1833FS6-7 and AP7346D-3318FS6-7 both draw 100 µA quiescent current. AP7345D-1833RH4-7 draws 140 µA, a 40 µA increase. This difference is attributable to the higher current output capability (300mA vs. 130mA) and additional control features (Current Limit) in the 8-pin package.

Q: Can these parts be used interchangeably in existing designs?

A: AP7346D-3318FS6-7 can be used interchangeably with AP7346D-1833FS6-7 without PCB modification, provided output voltage requirements match. AP7345D-1833RH4-7 requires PCB redesign due to package change but offers higher current capacity and Active product status for new designs.