FPF1203LUCX Equivalent & Substitute Parts

Part Overview

The FPF1203LUCX is a Power Switch/Driver IC manufactured by onsemi, classified as a general-purpose P-channel high-side switch in the IntelliMAX™ series. This component operates as a 1:1 power switch with slew rate control, rated for 2.2A maximum output current and load voltages from 1.2V to 5.5V. The device is currently marked as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production support.

Key Parameters

Parameter	FPF1203LUCX
Manufacturer	onsemi
Switch Type	General Purpose P-Channel
Output Configuration	High Side
Ratio (Input:Output)	1:1
Current - Output (Max)	2.2A
Voltage - Load	1.2V ~ 5.5V
Rds On (Typ)	45mOhm
Input Type	Inverting
Features	Slew Rate Controlled
Operating Temperature	-40°C ~ 85°C (TA)
Package	4-WLCSP (0.76x0.76)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the FPF1203LUCX is determined by the following core parameters:

Switch Configuration: General purpose P-channel high-side switch with 1:1 input-output ratio
Output Current Capability: Minimum 2.2A to maintain functional equivalence
Load Voltage Range: Must support 1.2V ~ 5.5V operation
On-Resistance: Rds On ≤ 60mOhm to ensure comparable performance
Control Interface: On/Off control with inverting or non-inverting input
Slew Rate Control: Feature presence indicates controlled switching characteristics
Package Compatibility: Surface mount packages with similar thermal and electrical performance
Compliance: ROHS3 compliance and operating temperature range -40°C ~ 85°C

Substitute parts are grouped into two categories:

Category A - Direct Functional Equivalents (2A+ Output Current): Parts meeting or exceeding the 2.2A output specification with comparable Rds On values and full feature set.

Category B - Reduced Current Alternatives (500mA Output Current): Parts with lower output current ratings suitable for applications with reduced power requirements.

Parameter Comparison

Part Number	Manufacturer	Output Current (Max)	Voltage - Load	Rds On (Typ)	Input Type	Features	Package	Product Status
FPF1203LUCX	onsemi	2.2A	1.2V ~ 5.5V	45mOhm	Inverting	Slew Rate Controlled	4-WLCSP (0.76x0.76)	Obsolete
TPS22910AYZVR	Texas Instruments	2A	1.4V ~ 5.5V	60mOhm	Non-Inverting	Slew Rate Controlled, Reverse Current, UVLO	4-DSBGA (0.88x0.88)	Active
TPS22910AYZVT	Texas Instruments	2A	1.4V ~ 5.5V	60mOhm	Non-Inverting	Slew Rate Controlled, Reverse Current, UVLO	4-DSBGA (0.88x0.88)	Active
TPS22912CYZVR	Texas Instruments	2A	1.4V ~ 5.5V	60mOhm	Non-Inverting	Slew Rate Controlled, Reverse Current, UVLO	4-DSBGA (0.88x0.88)	Active
TPS22912CYZVT	Texas Instruments	2A	1.4V ~ 5.5V	60mOhm	Non-Inverting	Slew Rate Controlled, Reverse Current, UVLO	4-DSBGA (0.88x0.88)	Active
TPS22913BYZVR	Texas Instruments	2A	1.4V ~ 5.5V	60mOhm	Non-Inverting	Load Discharge, Slew Rate Controlled, Reverse Current, UVLO	4-DSBGA (0.88x0.88)	Active
TPS22901YFPR	Texas Instruments	500mA	1V ~ 3.6V	78mOhm	Non-Inverting	Slew Rate Controlled	4-DSBGA	Active
TPS22902BYFPR	Texas Instruments	500mA	1V ~ 3.6V	78mOhm	Non-Inverting	Load Discharge, Slew Rate Controlled	4-DSBGA	Active
TPS22902YFPR	Texas Instruments	500mA	1V ~ 3.6V	78mOhm	Non-Inverting	Load Discharge, Slew Rate Controlled	4-DSBGA	Active
TPS22906YZVR	Texas Instruments	500mA	1V ~ 3.6V	90mOhm	Non-Inverting	Load Discharge, Slew Rate Controlled	4-DSBGA (0.88x0.88)	Not For New Designs

Engineering Selection Recommendations

For Direct Replacement (Category A - 2A Output Current):

The TPS22910AYZVR, TPS22910AYZVT, TPS22912CYZVR, TPS22912CYZVT, and TPS22913BYZVR are active production alternatives from Texas Instruments. All are ROHS3 compliant with operating temperature range -40°C ~ 85°C. These parts deliver 2A output current with 60mOhm Rds On, meeting the functional requirements of the FPF1203LUCX. The TPS22913BYZVR includes load discharge capability in addition to standard features. All Category A substitutes include reverse current and UVLO fault protection, providing enhanced reliability compared to the original part.

For Reduced Current Applications (Category B - 500mA Output Current):

The TPS22901YFPR, TPS22902BYFPR, and TPS22902YFPR are suitable for applications requiring maximum 500mA output current. These parts are ROHS3 compliant and active in production. The TPS22902 variants include load discharge functionality. The TPS22906YZVR is marked "Not For New Designs" and should not be selected for new applications.

Packaging Consideration:

The original FPF1203LUCX uses 4-WLCSP (0.76x0.76) packaging. All recommended substitutes employ 4-DSBGA packaging (0.88x0.88 for 2A variants, standard for 500mA variants). PCB layout modifications are required to accommodate the different package footprint.

Input Control Logic:

The FPF1203LUCX uses inverting input control, while all recommended Texas Instruments substitutes employ non-inverting input control. Circuit design modifications to the control signal path are necessary.

Frequently Asked Questions (FAQ)

Q: Can TPS22910AYZVR directly replace FPF1203LUCX without circuit modifications?

A: No. Two modifications are required: (1) PCB layout must accommodate the different package footprint (4-DSBGA 0.88x0.88 versus 4-WLCSP 0.76x0.76), and (2) the control signal logic must be inverted due to the change from inverting to non-inverting input control.

Q: What is the difference between TPS22910AYZVR and TPS22912CYZVR?

A: Both deliver 2A output current with identical electrical specifications. The primary difference is packaging: TPS22910AYZVR is supplied in Cut Tape (CT) & Digi-Reel® format, while TPS22912CYZVR is also supplied in Cut Tape (CT) & Digi-Reel® format. Inventory availability differs between the two part numbers.

Q: Are the 500mA alternatives suitable for the FPF1203LUCX application?

A: Only if the application current requirement does not exceed 500mA. The TPS22901YFPR, TPS22902BYFPR, and TPS22902YFPR are functionally equivalent for lower-power applications. Load voltage range is reduced to 1V ~ 3.6V compared to the original 1.2V ~ 5.5V specification.

Q: Why does TPS22913BYZVR include "Load Discharge" as a feature?

A: Load discharge functionality provides active discharge of the load capacitance when the switch is turned off, enabling faster load voltage decay. This feature is not present in the original FPF1203LUCX but is available in the TPS22913BYZVR variant.

Q: Is TPS22906YZVR a viable substitute?

A: No. TPS22906YZVR is marked "Not For New Designs" and should not be selected for new applications or long-term production. Use TPS22913BYZVR or other active-status alternatives instead.

Q: What compliance certifications apply to all recommended substitutes?

A: All recommended substitutes are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Operating temperature range is -40°C ~ 85°C (TA) for all parts.

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