FPF2125 Equivalent & Substitute Parts

Part Overview

The FPF2125 is a Power Switch/Driver IC featuring a 1:1 P-Channel configuration rated for 1.5A output current in a SOT-23-5 surface mount package. Manufactured by onsemi as part of the IntelliMAX™ series, this component provides high-side switching with integrated fault protection including current limiting, over-temperature protection, reverse current blocking, and UVLO (Under-Voltage Lock-Out).

The FPF2125 is classified as Obsolete. Locating equivalent substitute parts is necessary to support ongoing design requirements, system maintenance, and production continuity where this component is specified in existing applications.

Substiute Parts

FPF2125

onsemiIn Stock: 3577FPF2125 Datasheet

Current PartRFQ

NCP380HMU15AATBG

onsemiIn Stock: 18130NCP380HMU15AATBG Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FPF2125 is determined by the following critical parameters:

• Output current rating of 1.5A maximum
• P-Channel high-side switching configuration
• 1:1 input-to-output ratio
• Load voltage range compatibility (minimum 1.8V support required)
• On/Off interface with non-inverting input logic
• General purpose switch type classification
• Surface mount technology
• Operating temperature range of -40°C to 85°C
• ROHS3 compliance and equivalent regulatory status

The NCP380HMU15AATBG meets these core substitution criteria while offering an alternative package form factor (6-UDFN versus SOT-23-5) and improved on-resistance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The NCP380HMU15AATBG is an active product substitute for the obsolete FPF2125. Both components maintain ROHS3 compliance and equivalent regulatory status (REACH Unaffected, ECCN EAR99, HTSUS 8542.39.0001).

Key considerations for selection:

The NCP380HMU15AATBG provides superior on-resistance performance (55mOhm versus 125mOhm), resulting in reduced power dissipation and improved thermal efficiency in equivalent applications.

The load voltage range of the NCP380HMU15AATBG begins at 2.5V, compared to 1.8V for the FPF2125. Applications requiring operation below 2.5V require verification of alternative substitutes or retention of the original FPF2125 design.

Package form factor differs between the two parts (SOT-23-5 versus 6-UDFN). PCB layout and footprint modifications are necessary when implementing the NCP380HMU15AATBG as a substitute.

The NCP380HMU15AATBG includes additional integrated features (Enable Input High, Slew Rate Controlled, Status Flag) and fixed current limiting protection, compared to the adjustable current limiting in the FPF2125.

Frequently Asked Questions (FAQ)

Q: Can the NCP380HMU15AATBG directly replace the FPF2125 in existing designs?

A: Functional substitution is possible based on matching output current (1.5A), switching configuration (P-Channel high-side), and operating temperature range. However, package form factor differs (6-UDFN versus SOT-23-5), requiring PCB layout modifications. Load voltage range compatibility must be verified; applications below 2.5V require alternative solutions.

Q: What are the primary differences between these two parts?

A: The NCP380HMU15AATBG offers lower on-resistance (55mOhm versus 125mOhm), reducing power dissipation. It includes additional features such as Enable Input High, Slew Rate Controlled output, and Status Flag functionality. The minimum load voltage is 2.5V compared to 1.8V. The NCP380HMU15AATBG is an active product, while the FPF2125 is obsolete.

Q: Are there package compatibility considerations?

A: Yes. The FPF2125 uses SOT-23-5 packaging, while the NCP380HMU15AATBG uses 6-UDFN (2x2) with exposed pad. These are physically distinct packages requiring different PCB footprints and layout considerations.

Q: What is the impact of the lower on-resistance in the NCP380HMU15AATBG?

A: Lower on-resistance (55mOhm versus 125mOhm) reduces resistive power loss (I²R losses) during switching operation, resulting in lower junction temperatures and improved thermal performance in equivalent current applications.

Q: Are both parts compliant with the same regulatory standards?

A: Yes. Both the FPF2125 and NCP380HMU15AATBG are ROHS3 compliant, REACH Unaffected, and classified under ECCN EAR99 and HTSUS 8542.39.0001.

Q: What load voltage range must be considered for substitution?

A: The FPF2125 supports 1.8V to 5.5V load voltage, while the NCP380HMU15AATBG supports 2.5V to 5.5V. Applications operating below 2.5V cannot use the NCP380HMU15AATBG as a substitute without design modification or alternative component selection.