AP7341-25FS4-7 Equivalent & Substitute Parts

Part Overview

The AP7341-25FS4-7 is a linear voltage regulator IC manufactured by Diodes Incorporated, designed for positive fixed 2.5V output applications with 300mA current capacity. This Surface Mount device in 4-XDFN Exposed Pad packaging is classified as Active product status and is ROHS3 compliant. Substitute parts are necessary when the primary part experiences supply constraints, inventory limitations, or when design requirements demand enhanced performance characteristics such as lower dropout voltage, improved quiescent current, or higher output current capacity.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Part Number	AP7341-25FS4-7
Category	Power Management (PMIC)
Output Voltage (Fixed)	2.5V
Output Current	300mA
Voltage Dropout (Max)	0.65V @ 300mA
Quiescent Current	50 µA
Input Voltage (Max)	5.25V
Operating Temperature	-40°C ~ 85°C
Package	4-XDFN Exposed Pad
Mounting Type	Surface Mount
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the AP7341-25FS4-7 are categorized based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

Output Voltage: 2.5V fixed output (mandatory match)
Output Current: Minimum 300mA (equal or greater acceptable)
Package Type: 4-XDFN Exposed Pad or compatible Surface Mount packages
Output Configuration: Positive fixed output
Control Features: Enable function required
Protection Features: Over Current protection minimum requirement
RoHS Compliance: ROHS3 Compliant
Mounting Type: Surface Mount

Secondary Performance Considerations:

Voltage Dropout: Lower values indicate improved efficiency
Quiescent Current: Lower values reduce standby power consumption
Input Voltage Maximum: Must accommodate system supply voltage
Operating Temperature Range: Must cover application requirements
PSRR (Power Supply Rejection Ratio): Higher values indicate better noise rejection

Parametric equivalents maintain identical electrical specifications. Manufacturer-recommended alternatives offer enhanced performance characteristics while maintaining core functional compatibility.

Parameter Comparison

Parameter	AP7341-25FS4-7	AP7341D-25FS4-7	AP7343D-25FS4-7B	BU25UA3WNVX-TL	LP5907SNX-2.5/NOPB	NCP161BMX250TBG
Manufacturer	Diodes Inc.	Diodes Inc.	Diodes Inc.	Rohm Semi.	Texas Instruments	onsemi
Output Voltage	2.5V	2.5V	2.5V	2.5V	2.5V	2.5V
Output Current	300mA	300mA	300mA	300mA	250mA	450mA
Voltage Dropout (Max)	0.65V @ 300mA	0.65V @ 300mA	0.3V @ 300mA	0.22V @ 300mA	0.25V @ 250mA	0.315V @ 450mA
Quiescent Current	50 µA	50 µA	60 µA	90 µA	25 µA	23 µA
Input Voltage (Max)	5.25V	5.25V	5.25V	5.5V	5.5V	5.5V
PSRR	75dB (1kHz)	75dB (1kHz)	75dB (1kHz)	70dB (1kHz)	90dB ~ 60dB (100Hz ~ 100kHz)	91dB ~ 48dB (100Hz ~ 100kHz)
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C
Package	4-XDFN Exposed Pad	4-XDFN Exposed Pad	4-XDFN Exposed Pad	4-UDFN Exposed Pad	4-XDFN Exposed Pad	4-XDFN Exposed Pad
Product Status	Active	Active	Active	Not For New Designs	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Parametric Equivalents (Direct Substitution):

AP7341D-25FS4-7 and AP7341-25FS4-7 are parametric equivalents with identical electrical specifications and packaging. Both maintain Active product status and ROHS3 compliance. Selection between these parts is determined by inventory availability and supplier preference.

AP7343D-25FS4-7B represents an enhanced variant within the Diodes Incorporated AP7343 series, offering improved dropout voltage (0.3V vs. 0.65V) while maintaining identical output current and package compatibility. This part is suitable for applications requiring lower power dissipation or operation with tighter input voltage margins. Active product status and ROHS3 compliance are maintained.

Manufacturer-Recommended Alternatives:

BU25UA3WNVX-TL (Rohm Semiconductor) provides equivalent 2.5V/300mA output with superior dropout voltage (0.22V) and includes Over Temperature protection in addition to Over Current protection. However, this part carries "Not For New Designs" status, limiting its suitability for new product development. Package variant (4-UDFN vs. 4-XDFN) requires PCB layout verification.

LP5907SNX-2.5/NOPB (Texas Instruments) delivers 2.5V output with reduced output current (250mA) and exceptional quiescent current performance (25 µA). Extended operating temperature range (-40°C ~ 125°C) and superior PSRR characteristics (90dB ~ 60dB across 100Hz ~ 100kHz) support noise-sensitive applications. Active product status and ROHS3 compliance confirmed. Output current limitation requires verification against application requirements.

NCP161BMX250TBG (onsemi) provides 2.5V output with enhanced current capacity (450mA), lowest quiescent current (23 µA), and superior dropout voltage (0.315V @ 450mA). Includes Soft Start protection in addition to Over Current and Over Temperature protection. Extended operating temperature range (-40°C ~ 125°C) and superior PSRR characteristics support demanding applications. Active product status and ROHS3 compliance confirmed.

Frequently Asked Questions (FAQ)

Q: Can AP7341D-25FS4-7 directly replace AP7341-25FS4-7 without PCB modifications?

A: Yes. Both parts are parametric equivalents with identical electrical specifications, output voltage (2.5V), output current (300mA), dropout voltage (0.65V @ 300mA), and 4-XDFN Exposed Pad packaging. No PCB layout changes are required.

Q: What is the primary advantage of AP7343D-25FS4-7B over the original AP7341-25FS4-7?

A: AP7343D-25FS4-7B reduces dropout voltage from 0.65V to 0.3V at 300mA output current, resulting in lower power dissipation and improved efficiency. This enables operation with lower input supply voltages or reduced thermal management requirements. Package and output specifications remain identical.

Q: Why is BU25UA3WNVX-TL marked "Not For New Designs"?

A: This designation indicates the manufacturer has discontinued active development and recommends alternative parts for new product designs. While functionally compatible, long-term availability and support cannot be guaranteed. Use only in legacy product maintenance scenarios.

Q: Is LP5907SNX-2.5/NOPB suitable as a direct replacement if my application requires 300mA output?

A: No. LP5907SNX-2.5/NOPB is rated for 250mA maximum output current, which is insufficient for applications requiring 300mA. Exceeding rated output current will cause voltage regulation failure and potential device damage. NCP161BMX250TBG (450mA) or AP7343D-25FS4-7B (300mA) are appropriate alternatives.

Q: What are the package compatibility considerations when substituting with BU25UA3WNVX-TL?

A: BU25UA3WNVX-TL uses 4-UDFN Exposed Pad packaging versus the original 4-XDFN Exposed Pad. While both are 4-pin Surface Mount packages with similar footprints, PCB land pattern and thermal pad dimensions differ. Verify footprint compatibility with PCB design files before implementation.

Q: Which substitute part offers the best performance for low-power applications?

A: LP5907SNX-2.5/NOPB and NCP161BMX250TBG both deliver exceptional quiescent current performance (25 µA and 23 µA respectively), minimizing standby power consumption. NCP161BMX250TBG additionally provides higher output current capacity (450mA) if required by the application.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, meeting environmental and regulatory requirements equivalent to the original AP7341-25FS4-7.

Q: What is the operating temperature range difference between the original part and substitutes?

A: AP7341-25FS4-7, AP7341D-25FS4-7, AP7343D-25FS4-7B, and BU25UA3WNVX-TL operate across -40°C ~ 85°C. LP5907SNX-2.5/NOPB and NCP161BMX250TBG extend the upper limit to 125°C, supporting high-temperature applications. Verify application temperature requirements before selection.

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