AP7343-15FS4-7B Equivalent & Substitute Parts

Part Overview

The AP7343-15FS4-7B is a linear voltage regulator IC from Diodes Incorporated, classified as a Power Management (PMIC) component. This device delivers a fixed 1.5V output at 300mA with integrated over-current protection and enable control features. The part is currently active in production status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or specific performance parameter needs within the allowed electrical and mechanical specifications for this product category.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Output Voltage (Fixed)	1.5V
Output Current	300mA
Input Voltage (Max)	5.25V
Voltage Dropout (Max)	0.44V @ 300mA
Quiescent Current	60 µA
PSRR	75dB (1kHz)
Package / Case	4-XDFN Exposed Pad
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the AP7343-15FS4-7B are identified based on strict electrical and mechanical parameter matching within the Diodes Incorporated AP7343/AP7341 series. The substitution logic is based on the following key parameters:

Fixed output voltage of 1.5V
Output current capability of 300mA
Maximum input voltage of 5.25V
4-XDFN Exposed Pad package configuration
Surface mount mounting type
Operating temperature range of -40°C to 85°C
Enable control and over-current protection features
RoHS3 compliance and MSL 1 rating

Acceptable variations within this product category include voltage dropout specifications (0.44V to 0.47V range) and quiescent current differences (50 µA to 60 µA), which do not affect functional interchangeability in standard linear regulator applications. All substitute parts maintain identical output configuration (positive fixed), package footprint, and compliance certifications.

Parameter Comparison

Parameter	AP7343-15FS4-7B	AP7341-15FS4-7	AP7341D-15FS4-7	AP7343D-15FS4-7B
Manufacturer	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated
Output Voltage	1.5V	1.5V	1.5V	1.5V
Output Current	300mA	300mA	300mA	300mA
Input Voltage (Max)	5.25V	5.25V	5.25V	5.25V
Voltage Dropout (Max)	0.44V @ 300mA	0.47V @ 150mA	0.47V @ 150mA	0.44V @ 300mA
Quiescent Current	60 µA	50 µA	50 µA	60 µA
PSRR	75dB (1kHz)	75dB (1kHz)	75dB (1kHz)	75dB (1kHz)
Package / Case	4-XDFN Exposed Pad	4-XDFN Exposed Pad	4-XDFN Exposed Pad	4-XDFN Exposed Pad
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed maintain active production status with full RoHS3 compliance and REACH unaffected certification. The AP7343-15FS4-7B, AP7343D-15FS4-7B, AP7341-15FS4-7, and AP7341D-15FS4-7 are functionally equivalent within the specified electrical and mechanical parameters for 1.5V fixed output linear regulation at 300mA.

Selection between AP7343 and AP7341 variants is determined by voltage dropout performance requirements. The AP7343 series (AP7343-15FS4-7B and AP7343D-15FS4-7B) specifies 0.44V maximum dropout at 300mA, while the AP7341 series (AP7341-15FS4-7 and AP7341D-15FS4-7) specifies 0.47V maximum dropout at 150mA. The AP7343 variants also maintain 60 µA quiescent current compared to 50 µA in AP7341 variants.

All parts are packaged in 4-XDFN Exposed Pad configuration with identical footprint and mounting requirements. Compliance certifications, operating temperature range, and control/protection features are uniform across all substitute options.

Frequently Asked Questions (FAQ)

Q: Can AP7341-15FS4-7 be used as a direct replacement for AP7343-15FS4-7B?

A: Yes. Both parts deliver 1.5V fixed output at 300mA in identical 4-XDFN Exposed Pad packages with matching operating temperature ranges and compliance certifications. The primary difference is voltage dropout specification: AP7343 specifies 0.44V @ 300mA while AP7341 specifies 0.47V @ 150mA. This variation is within acceptable parameters for standard linear regulator applications.

Q: What is the difference between AP7343D-15FS4-7B and AP7343-15FS4-7B?

A: Both parts are electrically and mechanically identical with matching output voltage, current, dropout, and quiescent current specifications. The designation difference reflects internal die or manufacturing process variations within Diodes Incorporated's product line, with no functional impact on circuit performance.

Q: Are all substitute parts in the same package?

A: Yes. All listed substitute parts use the 4-XDFN Exposed Pad package with identical footprint, pin configuration, and surface mount requirements. No PCB layout modifications are required when substituting between these parts.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes. All substitute parts are RoHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity rating. All parts are currently in active production status.

Q: What parameters determine substitutability for the AP7343-15FS4-7B?

A: Substitutability is determined by fixed 1.5V output voltage, 300mA output current capability, 5.25V maximum input voltage, 4-XDFN Exposed Pad package, surface mount configuration, -40°C to 85°C operating temperature range, and integrated enable control with over-current protection. Voltage dropout and quiescent current variations within the specified ranges do not affect functional interchangeability.

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