AP2181DFMG-7 Equivalent & Substitute Parts

Part Overview

The AP2181DFMG-7 is an active high-side P-channel power switch designed for USB switching applications. This integrated circuit provides 1.5A output current with integrated protection features including current limiting, over-temperature protection, reverse current blocking, and under-voltage lockout (UVLO). The device operates across a 2.7V to 5.5V load voltage range and is housed in a 6-pin ultra-thin DFN package with exposed pad. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating, making it suitable for production deployment. Equivalent substitute parts are identified based on matching electrical performance parameters and package compatibility while accounting for functional differences in control logic.

Substiute Parts

AP2181DFMG-7

Diodes IncorporatedIn Stock: 5357AP2181DFMG-7 Datasheet

Current PartRFQ

AP2191DFMG-7

Diodes IncorporatedIn Stock: 2060AP2191DFMG-7 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AP2181DFMG-7 is determined by strict equivalence across the following critical parameters:

• Output Type: P-Channel high-side configuration
• Current Rating: 1.5A maximum output current
• Voltage Range: 2.7V to 5.5V load voltage operation
• On-Resistance: 90mOhm typical
• Package: 6-UFDFN with exposed pad (U-DFN2018-6)
• Fault Protection: Current limiting, over-temperature, reverse current, and UVLO
• Compliance: RoHS3 and REACH status alignment

The AP2191DFMG-7 qualifies as a parametric equivalent based on matching all electrical performance specifications and physical packaging requirements. The functional difference between these parts is the input control logic: the AP2181DFMG-7 uses inverting input logic while the AP2191DFMG-7 uses non-inverting input logic. This distinction requires circuit-level evaluation during design integration.

Parameter Comparison

Engineering Selection Recommendations

Both the AP2181DFMG-7 and AP2191DFMG-7 maintain Active product status with full RoHS3 compliance and REACH unaffected classification, ensuring long-term availability and regulatory alignment for production applications. Selection between these parts depends on control logic requirements: the AP2181DFMG-7 with inverting input is suitable for designs requiring active-low enable signals, while the AP2191DFMG-7 with non-inverting input accommodates active-high enable logic. Electrical performance, thermal characteristics, and protection mechanisms are identical across both devices. Inventory availability should be evaluated based on project timeline and volume requirements.

Frequently Asked Questions (FAQ)

Q: Can the AP2191DFMG-7 directly replace the AP2181DFMG-7 in an existing design?

A: Direct replacement requires circuit-level evaluation. While both parts are electrically and mechanically equivalent, the input control logic differs: AP2181DFMG-7 uses inverting logic and AP2191DFMG-7 uses non-inverting logic. The enable signal polarity must be verified against your control circuit before substitution.

Q: Are the package dimensions identical between these parts?

A: Yes. Both parts use the 6-UFDFN package with exposed pad (U-DFN2018-6 supplier designation). PCB footprints and thermal pad layouts are identical, allowing direct physical substitution at the board level.

Q: What is the significance of the 90mOhm on-resistance specification?

A: The 90mOhm typical on-resistance determines power dissipation and voltage drop across the switch at maximum load current. At 1.5A, this results in approximately 135mW dissipation. Both parts maintain this specification, ensuring equivalent thermal performance in the application.

Q: Do both parts provide the same protection features?

A: Yes. Both the AP2181DFMG-7 and AP2191DFMG-7 include fixed current limiting, over-temperature shutdown, reverse current blocking, and under-voltage lockout (UVLO). Load discharge and status flag outputs are also present on both devices.

Q: What is the voltage operating range for these USB switch ICs?

A: Both parts operate with load voltages from 2.7V to 5.5V, covering standard USB power delivery and battery-powered applications. No external supply voltage is required; the control logic is powered from the load voltage rail.