FPF1108 Equivalent & Substitute Parts

Part Overview

The FPF1108 is a Power Switch/Driver IC manufactured by onsemi, featuring a 1:1 P-Channel configuration with 1.2A maximum output current in a 4-WLCSP (0.96x0.96) package. This component operates as a high-side switch with on/off interface control, load discharge capability, and slew rate control. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production support.

Substiute Parts

FPF1108

onsemiIn Stock: 1919FPF1108 Datasheet

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TPS22906YZVR

Texas InstrumentsIn Stock: 15222TPS22906YZVR Datasheet

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TPS22907YZTR

Texas InstrumentsIn Stock: 5112TPS22907YZTR Datasheet

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TPS22907YZTT

Texas InstrumentsIn Stock: 2188TPS22907YZTT Datasheet

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TPS22910AYZVT

Texas InstrumentsIn Stock: 4248TPS22910AYZVT Datasheet

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TPS22913BYZVT

Texas InstrumentsIn Stock: 1274TPS22913BYZVT Datasheet

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TPS22913CYZVT

Texas InstrumentsIn Stock: 1810TPS22913CYZVT Datasheet

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TPS22930AYZVR

Texas InstrumentsIn Stock: 35266TPS22930AYZVR Datasheet

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TPS22930AYZVT

Texas InstrumentsIn Stock: 4299TPS22930AYZVT Datasheet

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TPS22934YZVR

Texas InstrumentsIn Stock: 20336TPS22934YZVR Datasheet

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TPS22934YZVT

Texas InstrumentsIn Stock: 1544TPS22934YZVT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the FPF1108 is determined by the following critical parameters:

Primary Substitution Criteria:

• Output Configuration: High Side, P-Channel, 1:1 ratio
• Switch Type: General Purpose
• Interface: On/Off control
• Operating Temperature Range: -40°C ~ 85°C (TA)
• Mounting Type: Surface Mount
• RoHS3 Compliance and MSL Level 1

Secondary Compatibility Factors:

• Current Output Capacity: Minimum 1.2A required
• Voltage Load Range: Must encompass or exceed 1.2V ~ 4V
• Rds On (Typ): Lower values indicate better performance; 35mOhm baseline
• Package Type: 4-DSBGA or 4-WLCSP configurations acceptable

Substitute parts are grouped into two categories based on current output capacity and voltage specifications:

Group A (2A Output, Extended Voltage Range): TPS22910AYZVT, TPS22913BYZVT, TPS22913CYZVT, TPS22930AYZVR, TPS22930AYZVT — suitable for applications requiring higher current headroom and wider voltage tolerance.

Group B (1A Output, Standard Voltage Range): TPS22907YZTR, TPS22907YZTT, TPS22934YZVR, TPS22934YZVT — direct current-matched alternatives with reduced voltage range.

Group C (500mA Output, Reduced Voltage Range): TPS22906YZVR — lower current capacity option for constrained applications.

Parameter Comparison

Engineering Selection Recommendations

For Active Production (Recommended):

TPS22930AYZVR and TPS22930AYZVT are the primary recommended substitutes. Both parts are Active status, feature matching 35mOhm Rds On specification, support 2A output current with extended voltage range (1.4V ~ 5.5V), and maintain full ROHS3 compliance with MSL Level 1. These parts provide superior performance margin over the FPF1108 while maintaining electrical compatibility.

TPS22913BYZVT and TPS22913CYZVT are secondary Active alternatives with identical 2A current and 60mOhm Rds On characteristics, offering additional load discharge features. Both support the extended 1.4V ~ 5.5V voltage range.

For Current Designs (Transitional Support):

TPS22910AYZVT is Active status with 2A output and enhanced fault protection (Reverse Current, UVLO), though Rds On is 60mOhm. This part accommodates the FPF1108's 1.2V ~ 4V load voltage range within its 1.4V ~ 5.5V specification.

For Constrained Applications:

TPS22934YZVR and TPS22934YZVT are Active alternatives matching the FPF1108's 1.2A current requirement with 1A rated output, featuring load discharge and UVLO protection. Voltage range is 1.5V ~ 3.6V, which covers most of the FPF1108 specification except the 1.2V lower bound.

TPS22907YZTR and TPS22907YZTT provide 1A output with 44mOhm Rds On but are Not For New Designs status. These are suitable only for legacy system maintenance.

TPS22906YZVR is Not For New Designs status with reduced 500mA output capacity and should be avoided for new applications.

Frequently Asked Questions (FAQ)

Q: Can TPS22930AYZVR directly replace FPF1108 in existing designs?

A: Yes. TPS22930AYZVR maintains functional equivalence across all critical parameters: high-side P-Channel 1:1 configuration, 2A output (exceeds 1.2A requirement), 35mOhm Rds On (matches FPF1108), and -40°C ~ 85°C operating range. Package footprint differs (4-DSBGA 0.88x0.88 vs. 4-WLCSP 0.96x0.96), requiring PCB layout verification. Both parts are ROHS3 compliant with MSL Level 1.

Q: What is the difference between TPS22930AYZVR and TPS22930AYZVT?

A: Both parts are electrically identical with matching specifications. The difference is packaging: TPS22930AYZVR is supplied in Cut Tape (CT) & Digi-Reel format, while TPS22930AYZVT is also Cut Tape (CT) & Digi-Reel. Consult supplier documentation for exact tape configuration and reel specifications.

Q: Why do some substitutes have higher current ratings (2A) than the FPF1108 (1.2A)?

A: Higher current ratings provide design margin and thermal headroom. A 2A-rated device operating at 1.2A experiences lower junction temperature and extended component life. This is standard engineering practice for obsolete part replacement.

Q: Are TPS22907 series parts suitable for new designs?

A: No. TPS22907YZTR and TPS22907YZTT are classified as Not For New Designs. These parts are acceptable only for sustaining existing products or legacy system maintenance. New designs must use Active status parts: TPS22930, TPS22913, TPS22910, or TPS22934 series.

Q: What is the impact of different Rds On values on circuit performance?

A: Rds On (on-resistance) directly affects power dissipation and voltage drop across the switch. FPF1108 and TPS22930 series both specify 35mOhm, resulting in identical power loss at rated current. TPS22913 and TPS22910 series at 60mOhm will dissipate approximately 71% more power at 1.2A. For thermal-sensitive applications, maintain Rds On at or below 60mOhm.

Q: Can TPS22934YZVR substitute for FPF1108 if my application only requires 1A output?

A: Partial compatibility exists. TPS22934YZVR provides 1A output with matching load discharge and UVLO protection. However, voltage range is 1.5V ~ 3.6V, which does not cover the FPF1108's 1.2V lower specification. If your application operates above 1.5V, TPS22934YZVR is acceptable. If 1.2V operation is required, use TPS22930 or TPS22913 series instead.

Q: What package considerations apply when substituting FPF1108?

A: FPF1108 uses 4-WLCSP (0.96x0.96), while all Texas Instruments substitutes use 4-DSBGA (0.88x0.88 or 0.9x0.9). Both are wafer-level chip-scale packages with similar footprints but different solder pad layouts. PCB redesign and reflow profile validation are required. Consult component datasheets for exact pad dimensions and spacing.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited moisture sensitivity), matching the FPF1108 environmental specifications.