AP131-15WL-7 Equivalent & Substitute Parts

Part Overview

The AP131-15WL-7 is a linear voltage regulator IC manufactured by Diodes Incorporated, designed for positive fixed 1.5V output applications with 300mA current capacity in a SOT-25 surface mount package. This Active product operates across -40°C to 85°C and includes integrated over-current and over-temperature protection features. The device is ROHS3 compliant with unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across critical parameters including output voltage, current capacity, dropout voltage, and package form factor.

Substiute Parts

AP131-15WL-7

Diodes IncorporatedIn Stock: 4264AP131-15WL-7 Datasheet

Current PartRFQ

AP7331-15WG-7

Diodes IncorporatedIn Stock: 17478AP7331-15WG-7 Datasheet

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TPS73215MDBVREP

Texas InstrumentsIn Stock: 2506TPS73215MDBVREP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AP131-15WL-7 are qualified based on the following critical parameters:

Electrical Compatibility Criteria:

• Fixed output voltage of 1.5V
• Output current capacity of 300mA or greater
• Maximum input voltage of 5.5V or higher
• Surface mount package in SC-74A / SOT-753 form factor
• Positive output configuration with fixed output type
• Single regulator architecture
• Enable control feature
• Over-current and over-temperature protection

Mechanical Compatibility Criteria:

• SOT-25 or equivalent surface mount package
• Identical pin configuration and footprint compatibility

Parts meeting these criteria are classified as direct substitutes. Variations in quiescent current, PSRR performance, or dropout voltage do not disqualify substitution when core electrical and mechanical parameters align.

Parameter Comparison

Engineering Selection Recommendations

AP7331-15WG-7 (Diodes Incorporated): This substitute maintains identical output voltage and current specifications with the same package form factor. The device offers improved quiescent current performance (75 µA versus 100 µA) and higher PSRR (65dB versus 60dB). Maximum input voltage tolerance is increased to 6V. Both devices share identical operating temperature range and protection architecture. This part is suitable for direct replacement in applications where the original packaging format (Tape & Reel) is acceptable.

TPS73215MDBVREP (Texas Instruments): This substitute provides the same 1.5V fixed output voltage and identical package form factor. The device features superior dropout voltage performance (0.15V @ 250mA versus 0.5V @ 300mA) and extended operating temperature range (-55°C ~ 125°C versus -40°C ~ 85°C). Output current capacity is reduced to 250mA, which represents a limitation for applications requiring full 300mA output. Additional protection features include short-circuit and reverse-polarity protection. This part is suitable for applications where output current requirements do not exceed 250mA and enhanced thermal performance is beneficial.

All substitute parts maintain ROHS3 compliance and Active product status, ensuring long-term availability and regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can AP7331-15WG-7 replace AP131-15WL-7 in all applications?

A: Yes, the AP7331-15WG-7 provides equivalent electrical performance with identical output voltage (1.5V), output current (300mA), and package form factor (SOT-25). The primary difference is packaging format (Tape & Reel versus Cut Tape & Digi-Reel). Both devices are Active products with ROHS3 compliance.

Q: What is the key limitation of TPS73215MDBVREP as a substitute?

A: The TPS73215MDBVREP has a reduced output current capacity of 250mA compared to the 300mA specification of the AP131-15WL-7. This part is suitable only for applications where maximum output current does not exceed 250mA. All other electrical parameters and the package form factor remain compatible.

Q: Are all substitute parts in the same package?

A: Yes, all three parts (AP131-15WL-7, AP7331-15WG-7, and TPS73215MDBVREP) use the SC-74A / SOT-753 package form factor with SOT-25 supplier device package designation. Pin configuration and footprint are identical, enabling direct PCB-level substitution.

Q: Do substitute parts have the same protection features?

A: The AP131-15WL-7 and AP7331-15WG-7 both include over-current and over-temperature protection. The TPS73215MDBVREP includes these features plus short-circuit and reverse-polarity protection, providing enhanced protection capability.

Q: What is the impact of quiescent current differences?

A: The AP7331-15WG-7 operates at 75 µA quiescent current versus 100 µA for the AP131-15WL-7, representing a 25% reduction in standby power consumption. The TPS73215MDBVREP operates at 550 µA, which is significantly higher and may impact battery-powered applications.

Q: Are all parts suitable for the full -40°C to 85°C operating range?

A: Yes, all three parts support the -40°C to 85°C operating temperature range. The TPS73215MDBVREP extends this range to -55°C ~ 125°C, providing additional thermal margin for extreme environment applications.

Q: What is the difference in dropout voltage performance?

A: The AP131-15WL-7 specifies 0.5V dropout at 300mA. The TPS73215MDBVREP specifies 0.15V dropout at 250mA, indicating superior low-dropout performance. The AP7331-15WG-7 does not specify dropout voltage in the provided data.