AP7353-31FS4-7 Equivalent & Substitute Parts

Part Overview

The AP7353-31FS4-7 is a Linear Voltage Regulator IC manufactured by Diodes Incorporated, classified as a Power Management (PMIC) component. This device functions as a positive fixed output LDO (Low Dropout) regulator with CMOS technology, delivering 250mA output current in a compact X2-DFN1010-4 (Type B) surface mount package. The part is actively produced and maintains automotive-grade qualification under AEC-Q100 standards. Substitute parts are identified when inventory constraints, lead time requirements, or design flexibility necessitate alternative sourcing while maintaining full electrical and mechanical compatibility.

Substiute Parts

AP7353-31FS4-7

Diodes IncorporatedIn Stock: 716AP7353-31FS4-7 Datasheet

Current PartRFQ

AP7353D-31FS4-7

Diodes IncorporatedIn Stock: 5716AP7353D-31FS4-7 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AP7353-31FS4-7 are identified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution logic is based on the following key parameters that must remain identical:

Electrical Parameters (Must Match):

• Output Configuration: Positive
• Output Type: Fixed
• Output Voltage: 3.1V (Min/Fixed)
• Maximum Input Voltage: 5.5V
• Maximum Dropout Voltage: 0.15V @ 250mA
• Output Current: 250mA
• Quiescent Current: 27 µA
• PSRR: 90dB ~ 70dB (100Hz ~ 10kHz)
• Control Features: Current Limit, Enable
• Protection Features: Over Current, Over Temperature, Short Circuit
• Operating Temperature Range: -40°C ~ 85°C

Mechanical Parameters (Must Match):

• Package Type: 4-XDFN Exposed Pad
• Supplier Device Package: X2-DFN1010-4 (Type B)
• Mounting Type: Surface Mount

Compliance Parameters (Must Match):

• Grade: Automotive
• Qualification: AEC-Q100
• RoHS Status: ROHS3 Compliant
• MSL: 1 (Unlimited)

Only parts meeting all specified parameters are listed as direct substitutes. The AP7353D-31FS4-7 satisfies all equivalence criteria and is therefore classified as a parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the AP7353-31FS4-7 and AP7353D-31FS4-7 are active production parts manufactured by Diodes Incorporated with identical electrical and mechanical specifications. Both devices carry automotive-grade qualification under AEC-Q100 standards and maintain ROHS3 compliance with MSL 1 rating, indicating unlimited shelf life under standard storage conditions.

Selection between these parts should be based on availability and lead time requirements. The AP7353D-31FS4-7 maintains higher inventory levels (5697 pieces) compared to the AP7353-31FS4-7 (681 pieces), making it suitable for applications where supply chain continuity is a priority. Both parts are functionally interchangeable in all circuit applications requiring a 3.1V fixed output, 250mA LDO regulator with automotive qualification in the X2-DFN1010-4 package.

Frequently Asked Questions (FAQ)

Q: Are the AP7353-31FS4-7 and AP7353D-31FS4-7 pin-for-pin compatible?

A: Yes. Both parts use the identical 4-XDFN Exposed Pad package (X2-DFN1010-4 Type B) with surface mount configuration. Pin assignments, pad layout, and electrical interface are identical, enabling direct PCB substitution without design modification.

Q: Can these parts be used interchangeably in automotive applications?

A: Yes. Both parts carry AEC-Q100 automotive qualification and operate across the identical temperature range (-40°C to 85°C). They meet the same compliance requirements for automotive-grade power management components.

Q: What is the difference between AP7353-31FS4-7 and AP7353D-31FS4-7?

A: The parts are parametrically equivalent. The primary difference is inventory availability. The AP7353D-31FS4-7 variant maintains higher stock levels. Both deliver identical electrical performance and meet all specified protection features including over-current, over-temperature, and short-circuit protection.

Q: Are both parts RoHS compliant?

A: Yes. Both the AP7353-31FS4-7 and AP7353D-31FS4-7 are ROHS3 compliant with MSL 1 rating, indicating unlimited moisture sensitivity protection under standard storage conditions.

Q: What output voltage does this regulator provide?

A: Both parts provide a fixed positive output voltage of 3.1V with a maximum dropout voltage of 0.15V at 250mA output current. Maximum input voltage is 5.5V.

Q: Can these regulators be used in low-power applications?

A: Yes. Both parts feature low quiescent current of 27 µA, making them suitable for battery-powered and low-power applications. The PSRR specification of 90dB to 70dB (100Hz to 10kHz) provides effective noise rejection across audio and switching frequency ranges.