AP7341D-31FS4-7 Equivalent & Substitute Parts

Part Overview

The AP7341D-31FS4-7 is a linear voltage regulator IC from Diodes Incorporated, classified as a Power Management (PMIC) component. It delivers a fixed positive output of 3.1V at 300mA with integrated enable control and over-current protection. The device operates across the temperature range of -40°C to 85°C and is packaged in a 4-XDFN Exposed Pad surface mount configuration. This part maintains Active product status and holds ROHS3 compliance with unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified based on matching electrical specifications, output configuration, package type, and regulatory compliance. Alternative models may be required due to inventory availability, lead time considerations, or specific application requirements within the allowed parameter tolerance.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Min/Fixed)	3.1V
Voltage - Input (Max)	5.25V
Current - Output	300mA
Package / Case	4-XDFN Exposed Pad
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C
Control Features	Enable
Protection Features	Over Current
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the AP7341D-31FS4-7 is determined by the following criteria:

Electrical Parameters (Critical):

Output voltage: 3.1V fixed
Maximum input voltage: 5.25V
Output current capability: 300mA
Control features: Enable function
Protection: Over-current protection

Physical Parameters (Critical):

Package type: 4-XDFN Exposed Pad
Mounting: Surface Mount
Supplier device package: X2-DFN1010-4

Compliance & Status (Required):

Product status: Active
RoHS compliance: ROHS3 Compliant
Moisture sensitivity: MSL 1 (Unlimited)

The substitute parts AP7341-31FS4-7, AP7343-31FS4-7B, and AP7341D-31FS4-7 meet all critical electrical and physical parameters. Variations in dropout voltage and quiescent current do not disqualify substitution when the primary output specifications and package requirements are satisfied.

Parameter Comparison

Parameter	AP7341D-31FS4-7 (Main)	AP7341-31FS4-7	AP7343-31FS4-7B
Manufacturer	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated
Voltage - Output (Min/Fixed)	3.1V	3.1V	3.1V
Voltage - Input (Max)	5.25V	5.25V	5.25V
Current - Output	300mA	300mA	300mA
Voltage Dropout (Max)	0.65V @ 300mA	0.27V @ 150mA	0.29V @ 300mA
Current - Quiescent (Iq)	50 µA	50 µA	60 µA
PSRR	75dB (1kHz)	75dB (1kHz)	75dB (1kHz)
Package / Case	4-XDFN Exposed Pad	4-XDFN Exposed Pad	4-XDFN Exposed Pad
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Control Features	Enable	Enable	Enable
Protection Features	Over Current	Over Current	Over Current
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three substitute parts—AP7341-31FS4-7, AP7343-31FS4-7B, and AP7341D-31FS4-7—are qualified equivalents for the AP7341D-31FS4-7 based on matching electrical output specifications, identical package configuration, and equivalent regulatory compliance.

AP7341-31FS4-7: This part is electrically equivalent with identical quiescent current (50 µA) and PSRR performance. The primary difference is packaging designation (no Tape & Reel specification provided in input data). Inventory availability is significantly higher at 63,080 units.

AP7343-31FS4-7B: This part maintains all critical electrical parameters with marginally improved dropout voltage performance (0.29V @ 300mA versus 0.65V @ 300mA). Quiescent current is slightly elevated at 60 µA. This variant is suitable for applications where lower dropout voltage provides operational advantage. Inventory is 699 units.

AP7341D-31FS4-7: This is the exact part number match with Tape & Reel packaging. Current inventory is 789 units.

Selection should prioritize product availability, supply chain lead times, and application-specific performance requirements within the specified parameter ranges. All parts maintain Active status and full ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can AP7341-31FS4-7 directly replace AP7341D-31FS4-7 in production?

A: Yes. Both parts deliver identical electrical specifications: 3.1V fixed output, 300mA current capability, 5.25V maximum input, and equivalent control/protection features. The primary distinction is packaging format. Verify your assembly process accommodates the packaging designation of the substitute part.

Q: What is the significance of the dropout voltage difference between AP7341D-31FS4-7 (0.65V @ 300mA) and AP7343-31FS4-7B (0.29V @ 300mA)?

A: Dropout voltage determines the minimum input voltage required to maintain regulated output at full load current. AP7343-31FS4-7B requires lower input voltage headroom. Select AP7343-31FS4-7B if your application operates with constrained input voltage margins. Both parts are functionally equivalent for standard 5.25V input applications.

Q: Are all three parts compatible with the same PCB footprint?

A: Yes. All three parts use the 4-XDFN Exposed Pad package (X2-DFN1010-4 supplier designation). PCB layout and thermal management considerations remain identical across all substitutes.

Q: Do the substitute parts maintain the same compliance certifications?

A: Yes. All three parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited moisture sensitivity). Regulatory and environmental compliance is equivalent across all substitutes.

Q: Which part should be selected for new designs?

A: Selection depends on supply availability and application requirements. AP7341-31FS4-7 offers the highest inventory (63,080 units). AP7343-31FS4-7B is preferred if lower dropout voltage improves system performance. All parts maintain Active product status and are suitable for new design implementation.

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