FPF1003 Power Switch IC - Equivalent & Substitute Parts

Part Overview

The FPF1003 is a Power Switch/Driver IC manufactured by onsemi, designed for high-side P-Channel switching applications with 1:1 input-to-output ratio. This component operates across a 1.2V to 5.5V load voltage range with a maximum output current of 2A and typical on-resistance of 20mOhm. The FPF1003 is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility across electrical specifications, output configuration, and mechanical packaging to ensure direct replacement capability.

Key Parameters

Parameter	FPF1003 Specification
Manufacturer	onsemi
Category	Power Management (PMIC)
Switch Type	General Purpose
Output Type	P-Channel
Output Configuration	High Side
Number of Outputs	1
Ratio - Input:Output	1:1
Voltage - Load	1.2V ~ 5.5V
Current - Output (Max)	2A
Rds On (Typ)	20mOhm
Interface	On/Off
Input Type	Non-Inverting
Features	Slew Rate Controlled
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	6-UFBGA, WLCSP
Supplier Device Package	6-WLCSP (0.96x1.66)
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8542.39.0001

Substitute Part Grouping Explanation

Substitute parts for the FPF1003 are categorized based on strict adherence to the following critical parameters:

Primary Substitution Criteria:

Output Type (P-Channel vs. N-Channel)
Output Configuration (High Side)
Ratio - Input:Output (1:1)
Current - Output (Max) ≥ 2A
Operating Temperature Range (-40°C ~ 85°C)
Mounting Type (Surface Mount)
Interface (On/Off)
Input Type (Non-Inverting)

Parametric Equivalent: FPF1003A maintains identical electrical and mechanical specifications as the main part, differing only in manufacturer (Fairchild Semiconductor) and product status (Active vs. Obsolete).

Similar Substitutes: Parts including TCK112G,LF, TPS22921YZPR, TPS22921YZTR, TPS22924BYZPRB, TPS22924BYZR, TPS22924BYZT, TPS22924CYZPRB, and TPS22924DYZPR share the same 1:1 ratio, high-side output configuration, and general-purpose switching characteristics. However, these parts exhibit variations in output type (N-Channel vs. P-Channel), current ratings, on-resistance, voltage ranges, and package types. Selection depends on specific circuit requirements and mechanical constraints.

Parameter Comparison

Part Number	Manufacturer	Output Type	Current - Output (Max)	Rds On (Typ)	Voltage - Load	Package / Case	Product Status	Inventory
FPF1003	onsemi	P-Channel	2A	20mOhm	1.2V ~ 5.5V	6-UFBGA, WLCSP	Obsolete	1878 Pcs
FPF1003A	Fairchild Semiconductor	P-Channel	2A	20mOhm	1.2V ~ 5.5V	6-UFBGA, WLCSP	Active	6601 Pcs
TCK112G,LF	Toshiba Semiconductor and Storage	N-Channel	3A	8.3mOhm	1.1V ~ 5.5V	6-UFBGA, WLCSP	Active	30200 Pcs
TPS22921YZPR	Texas Instruments	P-Channel	2A	14mOhm	0.9V ~ 3.6V	6-XFBGA, DSBGA	Active	4200 Pcs
TPS22921YZTR	Texas Instruments	P-Channel	2A	14mOhm	0.9V ~ 3.6V	6-XFBGA, DSBGA	Active	4260 Pcs
TPS22924BYZPRB	Texas Instruments	N-Channel	2A	18.3mOhm	0.75V ~ 3.6V	6-XFBGA, DSBGA	Active	3489 Pcs
TPS22924BYZR	Texas Instruments	N-Channel	2A	18.3mOhm	0.75V ~ 3.6V	6-XFBGA, DSBGA	Active	4200 Pcs
TPS22924BYZT	Texas Instruments	N-Channel	2A	18.3mOhm	0.75V ~ 3.6V	6-XFBGA, DSBGA	Active	2295 Pcs
TPS22924CYZPRB	Texas Instruments	N-Channel	2A	18.3mOhm	0.75V ~ 3.6V	6-XFBGA, DSBGA	Active	4160 Pcs
TPS22924DYZPR	Texas Instruments	N-Channel	2A	18.3mOhm	0.75V ~ 3.6V	6-XFBGA, DSBGA	Active	2020 Pcs
TPS22924DYZPT	Texas Instruments	N-Channel	2A	18.3mOhm	0.75V ~ 3.6V	6-XFBGA, DSBGA	Active	1352 Pcs

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalent): FPF1003A is the recommended direct replacement for FPF1003. This part maintains identical electrical specifications (2A output current, 20mOhm Rds On, 1.2V ~ 5.5V load voltage range) and mechanical packaging (6-WLCSP). FPF1003A carries Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

Alternative Selections Based on Circuit Requirements:

For P-Channel applications requiring lower on-resistance and active product status, TPS22921YZPR and TPS22921YZTR (Texas Instruments) offer 14mOhm Rds On with identical 2A output current. These parts operate across 0.9V ~ 3.6V load voltage, which is narrower than FPF1003 but suitable for lower-voltage applications. Package transition from 6-WLCSP to 6-DSBGA requires PCB layout modification.

For N-Channel applications, TCK112G,LF (Toshiba) provides superior current handling (3A) and lower on-resistance (8.3mOhm) while maintaining 6-WLCSP packaging compatibility. The TPS22924 series (Texas Instruments) offers multiple packaging and tape options (BYZPRB, BYZR, BYZT, CYZPRB, DYZPR, DYZPT) with 18.3mOhm on-resistance and 2A output current across 0.75V ~ 3.6V load voltage range.

All substitute parts maintain -40°C ~ 85°C operating temperature range, MSL 1 rating, REACH Unaffected status, and EAR99 ECCN classification, ensuring regulatory and environmental compliance equivalence.

Frequently Asked Questions (FAQ)

Q: Can FPF1003A directly replace FPF1003 without circuit modification? A: Yes. FPF1003A is a parametric equivalent with identical electrical specifications and mechanical packaging. No circuit or PCB layout changes are required.

Q: What is the primary difference between P-Channel (FPF1003, TPS22921) and N-Channel (TCK112G,LF, TPS22924 series) substitutes? A: Output type determines circuit topology. P-Channel switches control high-side loads with gate-to-ground control signals. N-Channel switches require gate-to-supply control signals. Selection depends on existing circuit design and control signal availability.

Q: Why do TPS22921YZPR and TPS22921YZTR have narrower voltage ranges (0.9V ~ 3.6V) compared to FPF1003 (1.2V ~ 5.5V)? A: Voltage range reflects the maximum load voltage the device can safely switch. TPS22921 series is optimized for lower-voltage applications. FPF1003 and FPF1003A support extended voltage operation up to 5.5V, making them suitable for higher-voltage systems.

Q: Are package transitions from 6-WLCSP to 6-DSBGA compatible without PCB redesign? A: No. While both are 6-pin BGA packages, physical dimensions differ (WLCSP: 0.96x1.66mm vs. DSBGA: 1.39x0.89mm). PCB footprint, via placement, and thermal management design require modification.

Q: Which substitute offers the best on-resistance performance? A: TCK112G,LF (Toshiba) provides the lowest on-resistance at 8.3mOhm, followed by TPS22921 series at 14mOhm. Lower on-resistance reduces power dissipation and heat generation in high-current applications.

Q: Do all substitute parts maintain the same MSL and compliance ratings as FPF1003? A: Yes. All listed substitutes carry MSL 1 (Unlimited), REACH Unaffected status, and EAR99 ECCN classification, ensuring equivalent environmental and regulatory compliance.

Q: What inventory considerations should guide part selection? A: TCK112G,LF offers the highest inventory (30200 Pcs), followed by FPF1003A (6601 Pcs). For long-term production, active product status and available inventory ensure supply chain continuity.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message