AP7341D-28FS4-7 Equivalent & Substitute Parts

Part Overview

The AP7341D-28FS4-7 is a linear voltage regulator IC manufactured by Diodes Incorporated, delivering a fixed 2.8V output at 300mA with a maximum dropout voltage of 0.65V. This device operates across the temperature range of -40°C to 85°C and is housed in a 4-XDFN Exposed Pad package. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified when design requirements permit variations in electrical performance characteristics such as dropout voltage, quiescent current, output current capacity, or operating temperature range, while maintaining compatibility with the 2.8V fixed output voltage, positive output configuration, and 4-XDFN package footprint.

Key Parameters

Parameter	Value
Manufacturer Part Number	AP7341D-28FS4-7
Manufacturer	Diodes Incorporated
Output Voltage (Fixed)	2.8V
Output Current	300mA
Voltage Dropout (Max)	0.65V @ 300mA
Input Voltage (Max)	5.25V
Quiescent Current	50 µA
PSRR	75dB (1kHz)
Operating Temperature	-40°C ~ 85°C
Package / Case	4-XDFN Exposed Pad
Mounting Type	Surface Mount
Control Features	Enable
Protection Features	Over Current
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the AP7341D-28FS4-7 are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents (Diodes Incorporated): Parts AP7341-28FS4-7, AP7343-28FS4-7B, and AP7343D-28FS4-7B share identical output voltage (2.8V), output current (300mA), package type (4-XDFN Exposed Pad), and control/protection features. These parts differ in dropout voltage performance and quiescent current specifications. Substitution is valid when the application tolerates the specified electrical variations.

Manufacturer Recommended Alternatives (Cross-Manufacturer): Parts from onsemi (NCP160AMX280TBG, NCP161AMX280TBG, NCP161BMX280TBG) and Rohm Semiconductor (BU28TD2WNVX-TL) maintain the 2.8V fixed output voltage and 4-XDFN package footprint but offer different output current ratings, dropout voltages, quiescent current, and operating temperature ranges. These alternatives are suitable when design specifications permit higher output current capacity or improved performance characteristics.

Key parameters determining substitution validity:

Fixed output voltage: 2.8V (mandatory)
Package type: 4-XDFN Exposed Pad (mandatory for PCB compatibility)
Output configuration: Positive (mandatory)
Output current capacity: 300mA minimum for direct replacement
Dropout voltage: Application-dependent tolerance
Operating temperature range: -40°C to 85°C minimum

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Dropout Voltage (Max)	Quiescent Current	Input Voltage (Max)	Operating Temperature	Package	Inventory Status
AP7341D-28FS4-7	Diodes Incorporated	2.8V	300mA	0.65V @ 300mA	50 µA	5.25V	-40°C ~ 85°C	4-XDFN Exposed Pad	125100 Pcs
AP7341-28FS4-7	Diodes Incorporated	2.8V	300mA	0.65V @ 300mA	50 µA	5.25V	-40°C ~ 85°C	4-XDFN Exposed Pad	1081 Pcs
AP7343-28FS4-7B	Diodes Incorporated	2.8V	300mA	0.3V @ 300mA	60 µA	5.25V	-40°C ~ 85°C	4-XDFN Exposed Pad	1133 Pcs
AP7343D-28FS4-7B	Diodes Incorporated	2.8V	300mA	0.3V @ 300mA	60 µA	5.25V	-40°C ~ 85°C	4-XDFN Exposed Pad	400100 Pcs
NCP160AMX280TBG	onsemi	2.8V	250mA	0.16V @ 250mA	23 µA	5.5V	-40°C ~ 125°C	4-XDFN Exposed Pad	50100 Pcs
NCP161AMX280TBG	onsemi	2.8V	450mA	0.29V @ 450mA	23 µA	5.5V	-40°C ~ 125°C	4-XDFN Exposed Pad	1960 Pcs
NCP161BMX280TBG	onsemi	2.8V	450mA	0.29V @ 450mA	23 µA	5.5V	-40°C ~ 125°C	4-XDFN Exposed Pad	6573 Pcs
BU28TD2WNVX-TL	Rohm Semiconductor	2.8V	200mA	0.5V @ 200mA	60 µA	6V	-40°C ~ 85°C	4-UDFN Exposed Pad	215300 Pcs

Engineering Selection Recommendations

Direct Parametric Replacement: AP7341-28FS4-7, AP7343-28FS4-7B, and AP7343D-28FS4-7B are suitable direct replacements when the application circuit design accommodates the specified electrical parameter variations. All three parts maintain identical output voltage, current rating, package footprint, and operating temperature range. The AP7343 variants offer improved dropout voltage performance (0.3V versus 0.65V), reducing power dissipation in current-limited applications. All parts carry ROHS3 compliance and unlimited MSL rating.

Higher Output Current Applications: NCP161AMX280TBG and NCP161BMX280TBG from onsemi provide 450mA output current capacity with superior dropout voltage (0.29V @ 450mA) and lower quiescent current (23 µA). These parts extend the operating temperature range to 125°C and include additional protection features (Over Temperature, Soft Start). Selection is appropriate when the application requires higher current delivery or extended temperature operation.

Lower Output Current Applications: NCP160AMX280TBG from onsemi delivers 250mA output current with the lowest dropout voltage (0.16V @ 250mA) and quiescent current (23 µA). This part is suitable for applications where the 300mA rating of the AP7341D-28FS4-7 exceeds system requirements and power efficiency is prioritized.

Alternative Package Consideration: BU28TD2WNVX-TL from Rohm Semiconductor provides 200mA output current in a 4-UDFN package variant. This part is not recommended as a direct replacement due to the package difference (UDFN versus XDFN) and reduced output current capacity.

All recommended substitutes maintain ROHS3 compliance and unlimited MSL rating, ensuring regulatory and environmental compatibility with the original part specification.

Frequently Asked Questions (FAQ)

Q: Can AP7343-28FS4-7B replace AP7341D-28FS4-7 in my circuit?

A: Yes, AP7343-28FS4-7B is a parametric equivalent with identical output voltage (2.8V), output current (300mA), package (4-XDFN Exposed Pad), and operating temperature range (-40°C to 85°C). The primary difference is improved dropout voltage performance (0.3V versus 0.65V @ 300mA), which reduces power dissipation. No circuit modifications are required.

Q: What is the difference between NCP161AMX280TBG and AP7341D-28FS4-7?

A: NCP161AMX280TBG maintains the 2.8V output voltage and 4-XDFN package but offers higher output current capacity (450mA versus 300mA), lower dropout voltage (0.29V @ 450mA), lower quiescent current (23 µA versus 50 µA), and extended operating temperature range (-40°C to 125°C). This part is suitable when the application requires higher current delivery or improved thermal performance.

Q: Is NCP160AMX280TBG compatible with AP7341D-28FS4-7?

A: NCP160AMX280TBG shares the 2.8V output voltage and 4-XDFN package but is rated for 250mA output current, which is below the 300mA specification of AP7341D-28FS4-7. This part is suitable only when the application current requirement does not exceed 250mA.

Q: Can I use BU28TD2WNVX-TL as a substitute?

A: BU28TD2WNVX-TL is not recommended as a direct substitute. While it maintains the 2.8V output voltage, it uses a 4-UDFN package (different from 4-XDFN), has reduced output current capacity (200mA), and different electrical characteristics. Package incompatibility requires PCB redesign.

Q: What are the key parameters I must verify before substitution?

A: Verify that the substitute part maintains: (1) 2.8V fixed output voltage, (2) 4-XDFN Exposed Pad package footprint, (3) output current rating equal to or greater than 300mA, (4) operating temperature range compatible with your application (-40°C minimum, 85°C maximum), and (5) dropout voltage acceptable for your power supply headroom. All recommended substitutes meet these core requirements.

Q: Do all substitute parts have the same control and protection features?

A: AP7341D-28FS4-7 includes Enable control and Over Current protection. Diodes Incorporated equivalents (AP7341-28FS4-7, AP7343 variants) maintain identical features. onsemi parts (NCP160, NCP161 series) add Over Temperature and Soft Start protection. BU28TD2WNVX-TL includes Over Current and Over Temperature protection. Additional protection features do not prevent substitution but may provide enhanced reliability.

Q: What inventory considerations should I evaluate?

A: AP7343D-28FS4-7B offers the highest inventory availability (400100 Pcs), followed by AP7341D-28FS4-7 (125100 Pcs). NCP161BMX280TBG (6573 Pcs) and BU28TD2WNVX-TL (215300 Pcs) provide alternative sourcing options. Inventory levels should be evaluated against project lead time and supply chain requirements.

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