AP7346D-1828FS6-7 Equivalent & Substitute Parts

Part Overview

The AP7346D-1828FS6-7 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 2.8V with 130mA per channel, housed in a 6-pin X2-DFN1212-6 package. The part is currently in Last Time Buy status, making identification of equivalent and substitute components essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Part Number	AP7346D-1828FS6-7
Category	Power Management (PMIC)
Output Configuration	Positive Fixed, Dual Output
Output Voltages	1.8V, 2.8V
Current per Output	130mA
Input Voltage (Max)	5.25V
Dropout Voltage	0.39V @ 120mA (1.8V), 0.3V @ 120mA (2.8V)
Quiescent Current	100 µA
PSRR	75dB (1kHz)
Package	6-XFDFN Exposed Pad (X2-DFN1212-6)
Operating Temperature	-40°C to 85°C
Product Status	Last Time Buy
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the AP7346D-1828FS6-7 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Dual positive fixed output configuration at 1.8V and 2.8V
Maximum input voltage of 5.25V
Output current capability of at least 130mA per channel
Operating temperature range of -40°C to 85°C
PSRR of 75dB at 1kHz

Mechanical Compatibility Requirements:

Surface mount package type
Pin count and layout compatibility
Exposed pad design

Compliance Requirements:

ROHS3 compliance
REACH unaffected status

Two substitute parts are identified based on these parameters:

AP7346D-2818FS6-7 – Parametric equivalent with identical electrical specifications and package
AP7345D-1828RH4-7 – Functional equivalent with enhanced current capability and different package

Parameter Comparison

Parameter	AP7346D-1828FS6-7 (Main)	AP7346D-2818FS6-7 (Parametric Equivalent)	AP7345D-1828RH4-7 (Functional Equivalent)
Manufacturer	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated
Output Voltages	1.8V, 2.8V	1.8V, 2.8V	1.8V, 2.8V
Current per Output	130mA	130mA	300mA
Input Voltage (Max)	5.25V	5.25V	5.25V
Dropout Voltage @ Rated Current	0.39V @ 120mA (1.8V), 0.3V @ 120mA (2.8V)	0.39V @ 120mA (1.8V), 0.3V @ 120mA (2.8V)	0.39V @ 300mA (1.8V), 0.3V @ 300mA (2.8V)
Quiescent Current	100 µA	100 µA	140 µA
PSRR	75dB (1kHz)	75dB (1kHz)	75dB (1kHz)
Package	6-XFDFN Exposed Pad (X2-DFN1212-6)	6-XFDFN Exposed Pad (X2-DFN1212-6)	8-XFDFN Exposed Pad (X2-DFN1612-8)
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C
Product Status	Last Time Buy	Last Time Buy	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Control Features	Enable	Enable	Current Limit, Enable
Protection Features	Over Current	Over Current	Short Circuit

Engineering Selection Recommendations

AP7346D-2818FS6-7 (Parametric Equivalent): This part is the direct parametric equivalent to the AP7346D-1828FS6-7. It maintains identical electrical specifications, package configuration, and pin compatibility. Both parts are in Last Time Buy status. Selection of this substitute is appropriate for designs requiring exact performance matching with no layout modifications. Inventory availability should be verified for production timelines.

AP7345D-1828RH4-7 (Functional Equivalent): This part provides functional equivalence with enhanced output current capability (300mA per channel versus 130mA). The AP7345D-1828RH4-7 is in Active product status, ensuring long-term availability and supply chain stability. The package differs (8-pin X2-DFN1612-8 versus 6-pin X2-DFN1212-6), requiring PCB layout modifications. This substitute is suitable for designs where increased current headroom is beneficial or where long-term component availability is a priority. Both parts maintain ROHS3 compliance and identical output voltage specifications.

Frequently Asked Questions (FAQ)

Q: Can AP7346D-2818FS6-7 be used as a direct replacement for AP7346D-1828FS6-7?

A: Yes. The AP7346D-2818FS6-7 is a parametric equivalent with identical electrical performance, output voltages (1.8V and 2.8V), current ratings (130mA per channel), and package configuration (6-XFDFN). No design modifications are required for direct substitution.

Q: What are the key differences between AP7346D-1828FS6-7 and AP7345D-1828RH4-7?

A: The primary differences are output current capability (130mA versus 300mA per channel), package size (6-pin X2-DFN1212-6 versus 8-pin X2-DFN1612-8), product status (Last Time Buy versus Active), and protection features (Over Current versus Short Circuit). Output voltages and input specifications remain identical.

Q: Does the AP7345D-1828RH4-7 require PCB layout changes?

A: Yes. The AP7345D-1828RH4-7 uses an 8-pin X2-DFN1612-8 package compared to the 6-pin X2-DFN1212-6 package of the AP7346D-1828FS6-7. PCB footprint and layout modifications are necessary for this substitution.

Q: Are all three parts ROHS3 compliant?

A: Yes. AP7346D-1828FS6-7, AP7346D-2818FS6-7, and AP7345D-1828RH4-7 are all ROHS3 compliant with REACH unaffected status.

Q: Which substitute should be selected for new designs?

A: For new designs prioritizing long-term supply chain stability, AP7345D-1828RH4-7 is recommended due to its Active product status. For designs requiring exact performance matching with existing layouts, AP7346D-2818FS6-7 provides parametric equivalence. Both parts meet all electrical and compliance requirements.

Q: What is the significance of Last Time Buy status?

A: Last Time Buy status indicates that the manufacturer will no longer accept new orders after a specified date. Existing inventory may be available, but long-term supply cannot be guaranteed. Designs using Last Time Buy components should plan for migration to Active alternatives.

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