FPF2003 Equivalent & Substitute Parts

Part Overview

The FPF2003 is an active P-Channel power switch manufactured by onsemi, designed for load switching applications in the 1.8V to 5.5V range. This IntelliMAX™ series component operates as a 1:1 high-side switch with 50mA maximum output current and integrated fault protection including current limiting, over-temperature, and under-voltage lockout (UVLO). The device is housed in a 5-TSSOP (SC-70-5) package and maintains Active product status with ROHS3 compliance. Equivalent and substitute parts are identified for applications requiring alternative sourcing, higher current capability, or extended temperature operating ranges.

Substiute Parts

FPF2003

onsemiIn Stock: 17461FPF2003 Datasheet

Current PartRFQ

FPF2002

Fairchild SemiconductorIn Stock: 65357FPF2002 Datasheet

Parametric EquivalentRFQ

TPS22942DCKR

Texas InstrumentsIn Stock: 3394TPS22942DCKR Datasheet

MFR RecommendedRFQ

TPS22943DCKR

Texas InstrumentsIn Stock: 3894TPS22943DCKR Datasheet

SimilarRFQ

TPS22944DCKR

Texas InstrumentsIn Stock: 20422TPS22944DCKR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FPF2003 are classified based on electrical and mechanical parameter compatibility within the power switch category. The primary substitution criteria are:

Critical Parameters for Substitution:

• Output Configuration: High Side P-Channel
• Ratio - Input:Output: 1:1
• Interface: On/Off
• Package / Case: 5-TSSOP, SC-70-5, SOT-353
• Fault Protection: Current Limiting (Fixed), Over Temperature, UVLO

Secondary Parameters Affecting Compatibility:

• Voltage - Load range (minimum 1.8V required)
• Current - Output (Max) capacity
• Rds On (on-resistance)
• Operating Temperature range

Parts are grouped as follows:

Parametric Equivalent: FPF2002 (onsemi/Fairchild Semiconductor) — identical electrical specifications and package, alternative sourcing option.

Manufacturer Recommended: TPS22942DCKR (Texas Instruments) — higher current capability (100mA vs 50mA), lower on-resistance (400mOhm vs 700mOhm), extended temperature range (-40°C ~ 125°C).

Similar Parts: TPS22943DCKR and TPS22944DCKR (Texas Instruments) — same package and core functionality with variations in current rating and on-resistance.

Parameter Comparison

Engineering Selection Recommendations

FPF2002 Selection: Use as a direct parametric equivalent when onsemi sourcing is unavailable. Identical electrical specifications and package ensure pin-for-pin compatibility. Verify ROHS3 compliance status with supplier documentation if regulatory compliance is required.

TPS22942DCKR Selection: Select when higher current capacity (100mA) is required within the same package footprint. Lower on-resistance (400mOhm) reduces power dissipation. Extended operating temperature range (-40°C ~ 125°C) supports applications with elevated thermal environments. All parts maintain ROHS3 compliance and Active product status.

TPS22943DCKR Selection: Use when current requirements are below 50mA and lower on-resistance is beneficial. Output current maximum of 40mA is suitable for lower-power load switching applications. Maintains full fault protection and ROHS3 compliance.

TPS22944DCKR Selection: Select for applications requiring 100mA output current with lower on-resistance characteristics. Functionally equivalent to TPS22942DCKR with identical electrical performance and extended temperature range.

All substitute parts maintain Active product status, ROHS3 compliance, and identical fault protection architecture (current limiting, over-temperature, UVLO).

Frequently Asked Questions (FAQ)

Q: Can FPF2002 be used as a direct replacement for FPF2003?

A: Yes. FPF2002 is a parametric equivalent with identical voltage range (1.8V ~ 5.5V), current rating (50mA), on-resistance (700mOhm), package (5-TSSOP, SC-70-5), and fault protection features. Pin-for-pin substitution is supported.

Q: What are the key differences between FPF2003 and TPS22942DCKR?

A: TPS22942DCKR provides higher output current (100mA vs 50mA), lower on-resistance (400mOhm vs 700mOhm), and extended operating temperature range (-40°C ~ 125°C vs -40°C ~ 85°C). Package and core functionality remain identical. Lower on-resistance reduces thermal dissipation in high-current applications.

Q: Is TPS22943DCKR suitable for applications requiring 50mA output?

A: TPS22943DCKR has a maximum output current rating of 40mA, which is below the 50mA requirement of FPF2003. This part is suitable only for applications with current demands not exceeding 40mA.

Q: Are all substitute parts available in the same package?

A: Yes. All listed substitute parts use the 5-TSSOP (SC-70-5, SOT-353) package, ensuring identical PCB footprint and mounting compatibility.

Q: Do all substitute parts include the same fault protection features?

A: Yes. All parts include current limiting (fixed), over-temperature protection, and under-voltage lockout (UVLO). FPF2003 includes a status flag feature; this feature is not specified for Texas Instruments alternatives.

Q: Which substitute part offers the best thermal performance?

A: TPS22942DCKR and TPS22944DCKR both feature 400mOhm on-resistance (vs 700mOhm for FPF2003), resulting in lower power dissipation and improved thermal performance at equivalent current levels.

Q: Are all parts ROHS3 compliant?

A: FPF2003, TPS22942DCKR, TPS22943DCKR, and TPS22944DCKR are confirmed ROHS3 compliant. FPF2002 compliance status is not specified in available documentation.