AP7341-33FS4-7 Equivalent & Substitute Parts

Part Overview

The AP7341-33FS4-7 is a linear voltage regulator IC manufactured by Diodes Incorporated, delivering a fixed 3.3V 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 90,100 units in stock.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances, or when superior performance characteristics are available in the same package class. Alternative sources and improved dropout voltage specifications may necessitate component substitution in production environments.

Key Parameters

Parameter	Value	Unit
Output Voltage (Fixed)	3.3	V
Output Current	300	mA
Input Voltage (Max)	5.25	V
Dropout Voltage @ 300mA	0.65	V
Quiescent Current	50	µA
PSRR @ 1kHz	75	dB
Operating Temperature Range	-40 to 85	°C
Package	4-XDFN Exposed Pad	X2-DFN1010-4
Control Features	Enable	—
Protection Features	Over Current	—

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Parametric Equivalents (AP7341D-33FS4-7, AP7343-33FS4-7B, AP7343D-33FS4-7): These parts maintain identical output voltage (3.3V), output current (300mA), input voltage maximum (5.25V), operating temperature range (-40°C to 85°C), and package configuration (4-XDFN Exposed Pad). The AP7343 variants feature improved dropout voltage performance (0.29V vs. 0.65V) while maintaining all other electrical specifications. All variants are manufactured by Diodes Incorporated and carry identical compliance certifications.

Manufacturer Recommended Alternatives (BU33TD2WNVX-TL, BU33UA3WNVX-TL, NCP160AMX330TBG, NCP161AMX330TBG, NCP161BMX330TBG, NCP177AMX330TCG, NCP177BMX330TCG): These parts are qualified substitutes from alternative manufacturers (Rohm Semiconductor and onsemi) with compatible electrical performance. Substitution is valid when output current requirements do not exceed the specified rating and operating temperature range is within -40°C to 85°C minimum. Package compatibility is maintained across all alternatives in the 4-XDFN or 4-UDFN Exposed Pad format.

Parameter Comparison

Part Number	Manufacturer	Output Voltage (V)	Output Current (mA)	Input Voltage Max (V)	Dropout @ Rated Current (V)	Quiescent Current (µA)	Package	Product Status
AP7341-33FS4-7	Diodes Incorporated	3.3	300	5.25	0.65 @ 300mA	50	4-XDFN Exposed Pad	Active
AP7341D-33FS4-7	Diodes Incorporated	3.3	300	5.25	0.65 @ 300mA	50	4-XDFN Exposed Pad	Active
AP7343-33FS4-7B	Diodes Incorporated	3.3	300	5.25	0.29 @ 300mA	60	4-XDFN Exposed Pad	Active
AP7343D-33FS4-7B	Diodes Incorporated	3.3	300	5.25	0.29 @ 300mA	60	4-XDFN Exposed Pad	Active
BU33TD2WNVX-TL	Rohm Semiconductor	3.3	200	6.0	0.42 @ 200mA	60	4-UDFN Exposed Pad	Active
BU33UA3WNVX-TL	Rohm Semiconductor	3.3	300	5.5	0.22 @ 300mA	90	4-UDFN Exposed Pad	Not For New Designs
NCP160AMX330TBG	onsemi	3.3	250	5.5	0.145 @ 250mA	23	4-XDFN Exposed Pad	Active
NCP161AMX330TBG	onsemi	3.3	450	5.5	0.26 @ 450mA	23	4-XDFN Exposed Pad	Active
NCP161BMX330TBG	onsemi	3.3	450	5.5	0.26 @ 450mA	23	4-XDFN Exposed Pad	Active
NCP177AMX330TCG	onsemi	3.3	500	5.5	0.175 @ 500mA	90	4-XDFN Exposed Pad	Active
NCP177BMX330TCG	onsemi	3.3	500	5.5	0.175 @ 500mA	90	4-XDFN Exposed Pad	Active

Engineering Selection Recommendations

Direct Substitutes (Diodes Incorporated): AP7341D-33FS4-7 provides identical electrical and mechanical specifications. AP7343-33FS4-7B and AP7343D-33FS4-7B offer superior dropout voltage performance (0.29V vs. 0.65V) while maintaining 300mA output current capability. All three alternatives are in active production status with ROHS3 compliance and unlimited moisture sensitivity rating.

Cross-Manufacturer Alternatives: onsemi NCP160AMX330TBG, NCP161AMX330TBG, NCP161BMX330TBG, NCP177AMX330TCG, and NCP177BMX330TCG are qualified alternatives with active product status. Selection depends on output current requirements: NCP160 series supports 250mA, NCP161 series supports 450mA, and NCP177 series supports 500mA. All maintain 3.3V output voltage and 4-XDFN package compatibility. Operating temperature range extends to 125°C for NCP160 and NCP161 variants.

Rohm Semiconductor Alternatives: BU33TD2WNVX-TL supports 200mA output current with active status. BU33UA3WNVX-TL supports 300mA output current but carries "Not For New Designs" status and should be avoided for new applications.

All substitute parts maintain ROHS3 compliance, unlimited moisture sensitivity rating (MSL 1), and REACH unaffected status consistent with the primary part.

Frequently Asked Questions (FAQ)

Q: Can AP7343-33FS4-7B replace AP7341-33FS4-7 directly?

A: Yes. Both parts deliver 3.3V at 300mA in identical 4-XDFN packages with matching input voltage ratings (5.25V max) and operating temperature range (-40°C to 85°C). AP7343 variants feature improved dropout voltage (0.29V vs. 0.65V), providing superior performance in the same footprint.

Q: What is the output current limitation when selecting substitute parts?

A: The AP7341-33FS4-7 is rated for 300mA maximum output current. Substitute parts must not be selected with lower current ratings for applications requiring the full 300mA specification. NCP160AMX330TBG (250mA) is unsuitable for 300mA loads. NCP161 and NCP177 series support 450mA and 500mA respectively and are suitable for 300mA applications.

Q: Are package dimensions identical across all substitute parts?

A: AP7341, AP7343, and onsemi NCP series use 4-XDFN Exposed Pad packages with identical footprints. Rohm BU33 series use 4-UDFN Exposed Pad packages with compatible pinout and similar dimensions. PCB layout modifications are not required for substitution within these package families.

Q: Why is BU33UA3WNVX-TL marked "Not For New Designs"?

A: This designation indicates the manufacturer has discontinued active development and recommends alternative parts for new applications. While electrically compatible, this part should not be selected for new designs due to potential future availability constraints.

Q: What compliance certifications apply to all substitute parts?

A: All listed substitute parts maintain ROHS3 compliance, unlimited moisture sensitivity rating (MSL 1), and REACH unaffected status. ECCN classification is EAR99 and HTSUS code is 8542.39.0001 across all alternatives.

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