AP2181FMG-7 Equivalent & Substitute Parts

Part Overview

The AP2181FMG-7 is an active power switch IC manufactured by Diodes Incorporated, classified as a Power Management (PMIC) device. This component functions as a P-Channel power switch with 1:1 input-to-output ratio, designed for high-side switching applications in USB power distribution and load management circuits. The device is currently in active production status with 3100 units available in inventory. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and functional characteristics align with the original specification, enabling seamless integration into existing designs or providing alternative sourcing options.

Substiute Parts

AP2181FMG-7

Diodes IncorporatedIn Stock: 3124AP2181FMG-7 Datasheet

Current PartRFQ

AP2191FMG-7

Diodes IncorporatedIn Stock: 5600AP2191FMG-7 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The AP2191FMG-7 is identified as a parametric equivalent to the AP2181FMG-7 based on the following substitution criteria:

Electrical Equivalence Parameters:

• Identical output type (P-Channel), output configuration (High Side), and 1:1 input-to-output ratio
• Matching load voltage range (2.7V ~ 5.5V)
• Identical maximum output current (1.5A)
• Identical on-resistance specification (90mOhm typical)
• Identical fault protection features (Current Limiting, Over Temperature, Reverse Current, UVLO)
• Identical operating temperature range (-40°C ~ 85°C)

Mechanical Compatibility:

• Identical package type (6-UFDFN Exposed Pad)
• Identical supplier device package (U-DFN2018-6)
• Identical mounting type (Surface Mount)

Functional Difference:

• Input Type: AP2181FMG-7 uses Inverting logic; AP2191FMG-7 uses Non-Inverting logic

This functional difference in input logic requires circuit-level evaluation to determine substitutability in specific applications.

Parameter Comparison

Engineering Selection Recommendations

Both AP2181FMG-7 and AP2191FMG-7 are active production devices from Diodes Incorporated with identical RoHS3 compliance and MSL ratings. Selection between these parts is determined by the input logic requirement of the application circuit. The AP2181FMG-7 operates with inverting input logic, while the AP2191FMG-7 operates with non-inverting input logic. All other electrical, thermal, and mechanical specifications are equivalent. Both devices are suitable for high-side P-Channel switching applications in the 2.7V to 5.5V load voltage range with 1.5A maximum output current capability.

Frequently Asked Questions (FAQ)

Q: Can AP2191FMG-7 directly replace AP2181FMG-7 in an existing circuit?

A: Direct replacement is possible only if the circuit control logic is compatible with non-inverting input operation. The AP2191FMG-7 requires the opposite logic state compared to the AP2181FMG-7 for equivalent switch control. Circuit redesign or control signal inversion may be required.

Q: Are the package dimensions identical between these parts?

A: Yes. Both parts use the 6-UFDFN Exposed Pad package with identical mechanical specifications and PCB footprint compatibility.

Q: What is the significance of the input type difference?

A: Input type determines the logic polarity required to control the switch. Inverting input means the switch turns on when the input signal is low; non-inverting input means the switch turns on when the input signal is high. This difference affects circuit design and control signal generation.

Q: Are thermal and current handling capabilities identical?

A: Yes. Both parts have identical maximum output current (1.5A), on-resistance (90mOhm typical), operating temperature range (-40°C to 85°C), and fault protection features including current limiting, over-temperature protection, reverse current protection, and UVLO.

Q: Can these parts be used interchangeably for USB power switching applications?

A: Both parts are classified as USB switches with identical electrical ratings and protection features. Interchangeability depends on whether the control circuit logic matches the input type requirement of the selected part.