TPS74201KTWR Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The TPS74201KTWR is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This device delivers 1.5A output current in a TO-263 (DDPAK-7) surface mount package and operates across an input voltage range up to 5.5V with adjustable output from 0.8V to 3.6V. The part is currently in Last Time Buy status, making identification of equivalent and substitute components essential for design continuity and procurement planning.

Substiute Parts

TPS74201KTWR

Texas InstrumentsIn Stock: 2243TPS74201KTWR Datasheet

Current PartRFQ

TPS74901RGWR

Texas InstrumentsIn Stock: 35349TPS74901RGWR Datasheet

MFR RecommendedRFQ

TPS74201KTWTG3

Texas InstrumentsIn Stock: 4077TPS74201KTWTG3 Datasheet

Parametric EquivalentRFQ

RT9183-33GGF

Richtek USA Inc.In Stock: 12802RT9183-33GGF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TPS74201KTWR is determined by the following critical parameters: output current capability, adjustable versus fixed output voltage configuration, input voltage tolerance, package compatibility, and control/protection feature set.

Two substitution categories exist:

Parametric Equivalent (Same Electrical Characteristics): Parts that maintain identical electrical specifications and package form factor, allowing direct replacement without circuit modification.

Manufacturer Recommended Upgrade (Enhanced Capability): Parts that exceed the original specifications in current delivery or integration features while maintaining voltage range compatibility and control architecture.

Alternative Manufacturer (Fixed Output Variant): Parts from alternative manufacturers that provide similar current handling and thermal performance but with fixed output voltage configuration, requiring circuit redesign.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Package, Same Electrical Performance): TPS74201KTWTG3 provides parametric equivalence to TPS74201KTWR with identical electrical specifications and TO-263 package compatibility. However, this part carries Obsolete product status, limiting long-term availability. Selection of this substitute is appropriate only when existing inventory is available and design refresh is not feasible.

For Active Product Status with Enhanced Performance: TPS74901RGWR is the manufacturer-recommended upgrade path. This part maintains adjustable output voltage range (0.8V to 3.6V) and identical control feature set (Enable, Power Good, Soft Start) while doubling output current capability to 3A. The 20-VQFN package requires PCB layout modification but provides superior thermal performance and active product status with extended availability. Voltage dropout increases to 0.28V at rated current, which must be evaluated against application requirements.

For Fixed Output Applications (3.3V Only): RT9183-33GGF from Richtek USA Inc. is suitable only for applications requiring fixed 3.3V output. This part delivers 1.5A in a compact SOT-223F package with active product status. Reduced control features (no Enable, Power Good, or Soft Start) and higher quiescent current (500 µA versus 115 µA) must be considered. Voltage dropout of 0.5V is significantly higher than the original part. This substitute requires complete circuit redesign and is applicable only to 3.3V fixed-output applications.

All substitute parts maintain ROHS3 compliance and EAR99 export classification consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can TPS74201KTWTG3 be used as a direct replacement for TPS74201KTWR? A: Yes, TPS74201KTWTG3 is a parametric equivalent with identical electrical specifications and TO-263 package. However, this part is Obsolete, making it unsuitable for new designs or long-term production. Use only if existing inventory is available and immediate design refresh is not possible.

Q: What are the key differences between TPS74201KTWR and TPS74901RGWR? A: TPS74901RGWR doubles the output current from 1.5A to 3A and transitions from TO-263 to 20-VQFN package. Both maintain adjustable output voltage (0.8V to 3.6V) and identical control features. Voltage dropout increases from 0.12V to 0.28V at rated current. The upgrade requires PCB layout redesign but provides active product status and superior thermal performance.

Q: Is RT9183-33GGF compatible with TPS74201KTWR? A: RT9183-33GGF is not a direct substitute. This part provides fixed 3.3V output only, whereas TPS74201KTWR is adjustable from 0.8V to 3.6V. Use RT9183-33GGF only in applications requiring fixed 3.3V output. Circuit redesign is required, including removal of output voltage adjustment network and Enable/Power Good control logic.

Q: What package considerations apply when switching from TPS74201KTWR to TPS74901RGWR? A: TPS74201KTWR uses TO-263 (DDPAK-7) with 7 leads plus tab. TPS74901RGWR uses 20-VQFN (5x5) with exposed pad. Pin assignments differ significantly, requiring complete PCB layout redesign. Thermal performance improves with the VQFN package due to larger exposed pad area.

Q: Are all substitute parts RoHS3 compliant? A: Yes, all listed substitute parts (TPS74201KTWTG3, TPS74901RGWR, and RT9183-33GGF) are ROHS3 compliant and REACH unaffected, matching the compliance profile of TPS74201KTWR.

Q: What is the impact of higher voltage dropout in TPS74901RGWR? A: TPS74901RGWR exhibits 0.28V dropout at 3A compared to 0.12V at 1.5A for TPS74201KTWR. Applications with tight input-to-output voltage margins must verify that the higher dropout does not violate minimum input voltage requirements or cause output voltage regulation failure under peak load conditions.

Q: Can TPS74201KTWR be replaced with a lower-current part? A: No substitute with lower current rating is provided. The listed alternatives either match (1.5A) or exceed (3A) the original current specification. Lower-current alternatives would not meet the application's power delivery requirements.