AP131-28WG-7 Equivalent & Substitute Parts

Part Overview

The AP131-28WG-7 is a linear voltage regulator IC from Diodes Incorporated, classified as a Power Management (PMIC) component. It delivers a fixed 2.8V output at 300mA in a surface-mount SOT-25 package. The device is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs and long-term support.

Substiute Parts

AP131-28WG-7

Diodes IncorporatedIn Stock: 746AP131-28WG-7 Datasheet

Current PartRFQ

AP7343-28W5-7

Diodes IncorporatedIn Stock: 49267AP7343-28W5-7 Datasheet

MFR RecommendedRFQ

AP131-28WL-7

Diodes IncorporatedIn Stock: 2120AP131-28WL-7 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AP131-28WG-7 is determined by the following critical parameters:

• Fixed output voltage of 2.8V
• Output current capability of 300mA
• Surface-mount SOT-25 package compatibility
• Operating temperature range of -40°C to 85°C
• Enable control feature
• Over-current protection

Two substitute parts meet these criteria: AP7343-28W5-7 (MFR Recommended) and AP131-28WL-7 (Parametric Equivalent). Both maintain identical output voltage, current rating, package form factor, and temperature range. Differences exist in input voltage tolerance, dropout voltage performance, quiescent current, and product lifecycle status.

Parameter Comparison

Engineering Selection Recommendations

AP7343-28W5-7 is the manufacturer-recommended substitute and the preferred choice for new designs. It maintains active product status with substantial inventory availability (49200 pcs), ensuring long-term supply chain stability. The AP7343-28W5-7 offers improved performance characteristics: lower dropout voltage (0.3V vs 0.5V) and reduced quiescent current (60 µA vs 100 µA), resulting in lower power dissipation and improved efficiency in battery-powered or thermally constrained applications.

AP131-28WL-7 is a parametric equivalent with identical electrical specifications to the main part but carries obsolete product status. This part should be considered only when existing inventory of AP131-28WG-7 is depleted and AP7343-28W5-7 cannot be used due to design constraints. The lower input voltage maximum (5.25V vs 5.5V) on AP7343-28W5-7 requires verification against circuit input specifications before selection.

All three parts are ROHS3 compliant and carry identical moisture sensitivity levels (MSL 1, Unlimited).

Frequently Asked Questions (FAQ)

Q: Can AP7343-28W5-7 be used as a direct replacement for AP131-28WG-7?

A: Yes. Both parts share identical output voltage (2.8V), output current (300mA), package form factor (SOT-25), and operating temperature range (-40°C to 85°C). The AP7343-28W5-7 has a lower maximum input voltage (5.25V vs 5.5V), so circuit input specifications must be verified to confirm compatibility.

Q: What is the difference between AP7343-28W5-7 and AP131-28WL-7?

A: Both are substitutes for AP131-28WG-7 with identical core electrical specifications. AP7343-28W5-7 is active production with superior performance (lower dropout voltage and quiescent current). AP131-28WL-7 is obsolete. AP7343-28W5-7 is the recommended choice for new designs.

Q: Does the lower dropout voltage of AP7343-28W5-7 affect circuit design?

A: Lower dropout voltage (0.3V vs 0.5V) is a performance advantage, reducing power dissipation and heat generation. No circuit redesign is required; the part operates identically in existing designs.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the SC-74A, SOT-753 package with identical pinout and mounting requirements.

Q: What is the significance of product status (Last Time Buy, Active, Obsolete)?

A: Last Time Buy indicates the AP131-28WG-7 is no longer in production. Active status (AP7343-28W5-7) ensures continued availability and support. Obsolete status (AP131-28WL-7) indicates no further production or support from the manufacturer.