AP7353-32FS4-7 Equivalent & Substitute Parts

Part Overview

The AP7353-32FS4-7 is a linear voltage regulator IC manufactured by Diodes Incorporated, classified as a Power Management PMIC. This device functions as a positive fixed output LDO (Low Dropout) regulator with a single output rated at 250mA, housed in a 4-XDFN Exposed Pad surface mount package. The part is actively produced and maintains AEC-Q100 automotive qualification with ROHS3 compliance. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory compliance are maintained across the same functional parameters.

Substiute Parts

AP7353-32FS4-7

Diodes IncorporatedIn Stock: 1093AP7353-32FS4-7 Datasheet

Current PartRFQ

AP7353D-32FS4-7

Diodes IncorporatedIn Stock: 1087AP7353D-32FS4-7 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AP7353-32FS4-7 are identified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution logic is based on the following key parameters:

Electrical Equivalence Criteria:

• Output voltage configuration (Positive, Fixed)
• Output voltage level (3.2V)
• Maximum output current (250mA)
• Maximum input voltage (5.5V)
• Voltage dropout specification (0.146V @ 250mA)
• Quiescent current (27 µA)
• PSRR performance (90dB ~ 70dB across 100Hz ~ 10kHz)
• Operating temperature range (-40°C ~ 85°C)

Mechanical Equivalence Criteria:

• Package type (4-XDFN Exposed Pad)
• Supplier device package designation (X2-DFN1010-4 Type B)
• Surface mount mounting type

Regulatory & Compliance Equivalence:

• RoHS3 compliance
• Moisture Sensitivity Level 1
• Active product status

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

Both the AP7353-32FS4-7 and AP7353D-32FS4-7 are active products manufactured by Diodes Incorporated with identical electrical specifications and mechanical packaging. Selection between these parts is based on the following factors:

Product Status: Both parts maintain active production status, ensuring continued availability and supply chain stability.

Compliance & Certification: Both parts are ROHS3 compliant and carry Moisture Sensitivity Level 1 (unlimited shelf life). The AP7353-32FS4-7 carries explicit AEC-Q100 automotive qualification designation, while the AP7353D-32FS4-7 carries automotive grade designation with AEC-Q100 qualification.

Parametric Identity: All electrical parameters, including output voltage, current capacity, dropout voltage, quiescent current, and PSRR performance, are identical across both parts. Operating temperature ranges are equivalent.

Package Compatibility: Both parts utilize the identical X2-DFN1010-4 (Type B) surface mount package with 4-XDFN Exposed Pad configuration, ensuring direct PCB layout compatibility.

Selection of either part is determined by supply availability, inventory status, and procurement lead time requirements, as no functional or compliance differentiation exists between the two devices.

Frequently Asked Questions (FAQ)

Q: Can AP7353D-32FS4-7 be used as a direct replacement for AP7353-32FS4-7?

A: Yes. Both parts are parametric equivalents with identical electrical specifications, output voltage (3.2V fixed), current rating (250mA), dropout voltage (0.146V @ 250mA), and package configuration (X2-DFN1010-4 Type B). Both maintain active product status and ROHS3 compliance.

Q: Are the package dimensions identical between AP7353-32FS4-7 and AP7353D-32FS4-7?

A: Yes. Both parts use the 4-XDFN Exposed Pad package with X2-DFN1010-4 (Type B) designation. PCB footprints and land patterns are identical, requiring no layout modifications for substitution.

Q: What is the significance of the "D" designation in AP7353D-32FS4-7?

A: The "D" in the part number indicates a variant within the AP7353 base product family. Both the AP7353-32FS4-7 and AP7353D-32FS4-7 maintain identical electrical performance and regulatory compliance, with the difference being an internal design or manufacturing revision that does not affect functional equivalence.

Q: Do both parts support the same control features and protection mechanisms?

A: Yes. Both parts include Current Limit and Enable control features, with Over Current, Over Temperature, and Short Circuit protection. These specifications are identical across both devices.

Q: What is the quiescent current specification for these regulators?

A: The quiescent current (Iq) for both AP7353-32FS4-7 and AP7353D-32FS4-7 is 27 µA, representing the standby current draw when the regulator is enabled but delivering minimal load current.

Q: Are these parts suitable for automotive applications?

A: Yes. The AP7353-32FS4-7 carries explicit AEC-Q100 automotive qualification. The AP7353D-32FS4-7 carries automotive grade designation with AEC-Q100 qualification. Both parts are suitable for automotive-grade applications within the specified operating temperature range of -40°C to 85°C.

Q: What is the PSRR performance of these regulators?

A: Both parts deliver Power Supply Rejection Ratio (PSRR) performance of 90dB at 100Hz, decreasing to 70dB at 10kHz. This specification is identical for both the AP7353-32FS4-7 and AP7353D-32FS4-7.

Q: Is there a difference in moisture sensitivity between these parts?

A: No. Both parts carry Moisture Sensitivity Level (MSL) 1 designation, indicating unlimited shelf life without moisture-related degradation concerns.