FPF2108 Equivalent & Substitute Parts

Part Overview

The FPF2108 is a Power Switch/Driver IC from onsemi's IntelliMAX™ series, configured as a 1:1 P-Channel high-side switch with 400mA output capability in a SOT-23-5 surface mount package. This component is classified as Obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The part integrates on/off control with comprehensive fault protection including current limiting, over-temperature monitoring, reverse current blocking, and under-voltage lockout (UVLO).

Substiute Parts

FPF2108

onsemiIn Stock: 8003FPF2108 Datasheet

Current PartRFQ

FPF2110

onsemiIn Stock: 21723FPF2110 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The FPF2108 has one parametric equivalent substitute: FPF2110. This substitution is valid based on strict parameter matching across all critical electrical and mechanical specifications:

Substitution Criteria (All Parameters Match):

• Switch type, output configuration, and channel type (P-Channel, 1:1, High Side)
• Maximum output current (400mA)
• Load voltage range (1.8V ~ 5.5V)
• On-resistance specification (125mOhm typical)
• Operating temperature range (-40°C ~ 85°C)
• Package type (SOT-23-5 / SC-74A)
• Fault protection features (Current Limiting, Over Temperature, Reverse Current, UVLO)
• Interface type (On/Off, Non-Inverting)
• Compliance certifications (ROHS3, MSL 1)

Both parts belong to the same IntelliMAX™ series and share identical functional specifications, making them direct parametric equivalents.

Parameter Comparison

Engineering Selection Recommendations

Both FPF2108 and FPF2110 are classified as Obsolete products. Selection between these parts should be based on availability and supply chain considerations rather than technical differentiation, as all electrical and mechanical parameters are identical.

Availability Consideration: FPF2110 shows higher inventory availability (21,697 pcs) compared to FPF2108 (7,969 pcs), making FPF2110 the preferred choice for new procurement and long-term supply assurance.

Compliance: Both parts maintain ROHS3 compliance and REACH Unaffected status, suitable for regulated applications. MSL rating of 1 (Unlimited) indicates no moisture sensitivity constraints for storage and handling.

Packaging: Both parts are supplied in SOT-23-5 (SC-74A) surface mount packages with identical pinout and footprint compatibility, enabling direct PCB substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can FPF2110 be used as a direct replacement for FPF2108? A: Yes. All electrical specifications, mechanical dimensions, package type, and fault protection features are identical. Direct substitution is possible without circuit modifications or PCB redesign.

Q: Are there any differences in pin configuration between FPF2108 and FPF2110? A: No. Both parts use the SOT-23-5 package with identical pinout and functional assignment. PCB footprints are directly compatible.

Q: Why are both parts marked as Obsolete? A: Product status reflects manufacturer lifecycle classification. Obsolete designation indicates these parts are no longer in active production. Existing inventory remains available from authorized distributors.

Q: What are the critical parameters that define substitution eligibility? A: Substitution is valid when the following parameters match: output current rating (400mA), load voltage range (1.8V ~ 5.5V), on-resistance (125mOhm), package type (SOT-23-5), fault protection features, and operating temperature range (-40°C ~ 85°C).

Q: Are there any compliance or certification differences? A: No. Both parts carry identical ROHS3 compliance, REACH Unaffected status, and MSL rating of 1 (Unlimited).

Q: Which part should be selected for new designs? A: FPF2110 is recommended due to higher inventory availability. However, since both parts are obsolete, long-term availability should be confirmed with the distributor before committing to production volumes.