FPF1004 Equivalent & Substitute Parts

Part Overview

The FPF1004 is an obsolete power switch/driver IC from onsemi's IntelliMAX™ series, designed as a 1:1 P-Channel high-side switch with 2A output capability in a 6-WLCSP package. The device features load discharge and slew rate control for general-purpose power management applications. Due to its obsolete product status, equivalent and substitute parts are necessary for ongoing design support and production continuity.

Key Parameters

Parameter	FPF1004 Specification
Manufacturer	onsemi
Switch Type	General Purpose
Output Type	P-Channel
Ratio (Input:Output)	1:1
Output Configuration	High Side
Current - Output (Max)	2A
Rds On (Typ)	20mOhm
Voltage - Load	1.2V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	6-UFBGA, WLCSP
Features	Load Discharge, Slew Rate Controlled
Input Type	Non-Inverting
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the FPF1004 is determined by the following critical parameters:

Primary Substitution Criteria:

Output Type: P-Channel (for direct functional replacement)
Ratio (Input:Output): 1:1
Output Configuration: High Side
Current - Output (Max): 2A minimum
Voltage - Load: Compatible range (1.2V ~ 5.5V or broader)
Operating Temperature: -40°C ~ 85°C (TA)
Package compatibility: 6-WLCSP or equivalent BGA footprint
Input Type: Non-Inverting
Features: Load Discharge and Slew Rate Controlled

Secondary Substitution Criteria (for functional alternatives):

Switch Type: General Purpose
Mounting Type: Surface Mount
MSL: 1 (Unlimited)

Parts are grouped into two categories:

Direct Equivalents: Parts matching all primary criteria (P-Channel, 1:1 ratio, 2A, high-side configuration, identical feature set).

Functional Alternatives: Parts with compatible electrical characteristics but different output types (N-Channel) or enhanced current ratings that maintain backward compatibility within the application's design envelope.

Parameter Comparison

Part Number	Manufacturer	Output Type	Ratio	Current (Max)	Rds On (Typ)	Voltage - Load	Package	Product Status	Features
FPF1004	onsemi	P-Channel	1:1	2A	20mOhm	1.2V ~ 5.5V	6-WLCSP	Obsolete	Load Discharge, Slew Rate Controlled
TCK22921G,LF	Toshiba	P-Channel	1:1	2A	25mOhm	1.1V ~ 5.5V	6-WCSPE	Active	Load Discharge, Slew Rate Controlled
TPS22921YZTR	Texas Instruments	P-Channel	1:1	2A	14mOhm	0.9V ~ 3.6V	6-DSBGA	Active	Slew Rate Controlled
TPS22922BYZPR	Texas Instruments	P-Channel	1:1	2A	14mOhm	0.9V ~ 3.6V	6-DSBGA	Active	Load Discharge, Slew Rate Controlled
TPS22922YZPR	Texas Instruments	P-Channel	1:1	2A	14mOhm	0.9V ~ 3.6V	6-DSBGA	Active	Load Discharge, Slew Rate Controlled
TCK112G,LF	Toshiba	N-Channel	1:1	3A	8.3mOhm	1.1V ~ 5.5V	6-WCSPC	Active	Load Discharge, Slew Rate Controlled
TPS22924BYZR	Texas Instruments	N-Channel	1:1	2A	18.3mOhm	0.75V ~ 3.6V	6-DSBGA	Active	Load Discharge, Slew Rate Controlled
TPS22924BYZT	Texas Instruments	N-Channel	1:1	2A	18.3mOhm	0.75V ~ 3.6V	6-DSBGA	Active	Load Discharge, Slew Rate Controlled
TPS22924CYZPR	Texas Instruments	N-Channel	1:1	2A	18.3mOhm	0.75V ~ 3.6V	6-DSBGA	Active	Load Discharge, Slew Rate Controlled
FPF1039UCX	onsemi	Not Specified	Not Specified	4.6A	20mOhm	1.2V ~ 5.5V	6-WLCSP	Active	Slew Rate Controlled

Engineering Selection Recommendations

Direct Replacement (P-Channel, 1:1, 2A, High-Side):

TCK22921G,LF (Toshiba) is the primary direct equivalent. It maintains P-Channel output type, 1:1 ratio, 2A current rating, and high-side configuration with identical feature set (load discharge and slew rate control). The device is RoHS3 compliant and carries active product status. Rds On specification (25mOhm) is slightly higher than FPF1004 (20mOhm) but remains within acceptable operating margins for general-purpose applications. Voltage range (1.1V ~ 5.5V) is compatible with the original specification.

TPS22921YZTR and TPS22922 series (Texas Instruments) provide P-Channel alternatives with superior Rds On performance (14mOhm). TPS22922BYZPR and TPS22922YZPR include load discharge functionality matching the FPF1004 feature set. These devices are RoHS3 compliant and active. Voltage range limitation (0.9V ~ 3.6V) requires design verification for applications requiring the full 5.5V upper limit of the original part.

Functional Alternative (N-Channel, 1:1, 2A, High-Side):

TCK112G,LF (Toshiba) and TPS22924 series (Texas Instruments) provide N-Channel alternatives with 1:1 ratio and high-side configuration. These require circuit topology adjustment from P-Channel to N-Channel operation. TCK112G,LF offers enhanced current capability (3A) and superior Rds On (8.3mOhm). TPS22924 variants maintain 2A rating with Rds On of 18.3mOhm. All are RoHS3 compliant and active products.

Higher Current Alternative:

FPF1039UCX (onsemi) provides 4.6A capability in the same 6-WLCSP package with matching voltage range (1.2V ~ 5.5V) and Rds On (20mOhm). Product status is active. Output type and configuration are not specified; design verification is required before selection.

All recommended substitutes carry RoHS3 compliance and MSL 1 (Unlimited) ratings, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can TCK22921G,LF directly replace FPF1004 without circuit modification?

A: Yes. TCK22921G,LF maintains identical output type (P-Channel), ratio (1:1), current rating (2A), and high-side configuration. Both devices feature load discharge and slew rate control. The 5mOhm increase in Rds On (25mOhm vs. 20mOhm) is within acceptable operating margins for general-purpose power switching applications. Voltage range compatibility (1.1V ~ 5.5V vs. 1.2V ~ 5.5V) is sufficient for standard applications.

Q: What is the difference between P-Channel and N-Channel substitutes?

A: P-Channel devices (TCK22921G,LF, TPS22921/TPS22922 series) provide direct functional replacement with identical circuit topology. N-Channel devices (TCK112G,LF, TPS22924 series) require circuit redesign to accommodate the different gate drive and switching characteristics of N-Channel topology. N-Channel alternatives offer superior Rds On performance but demand design verification.

Q: Why do TPS22921YZTR and TPS22922 series show lower voltage range (0.9V ~ 3.6V)?

A: Texas Instruments TPS22921/TPS22922 devices are optimized for lower voltage applications. Applications requiring operation above 3.6V must use TCK22921G,LF or FPF1004 equivalents that support the full 5.5V upper limit. Design verification of actual load voltage requirements is necessary before part selection.

Q: Is FPF1039UCX a suitable substitute despite unspecified output type?

A: FPF1039UCX offers higher current capability (4.6A) in the same 6-WLCSP package with matching voltage range and Rds On. However, output type and configuration are not specified in the datasheet parameters. Complete datasheet review and design verification are required before selection for applications requiring confirmed P-Channel or N-Channel operation.

Q: What packaging considerations apply to these substitutes?

A: FPF1004 uses 6-WLCSP (0.96x1.66mm). TCK22921G,LF uses 6-WCSPE (0.80x1.2mm), and TPS22921/TPS22922/TPS22924 series use 6-DSBGA. All are 6-pin BGA packages with similar footprint density. PCB layout verification is required to confirm mechanical compatibility, particularly for designs with tight routing constraints. Consult package datasheets for exact ball placement and solder pad specifications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitutes carry RoHS3 compliance certification. All devices maintain MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols.

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