TPS53126PWR Equivalent & Substitute Parts

Part Overview

The TPS53126PWR is a buck regulator positive output step-down DC-DC controller IC manufactured by Texas Instruments in the D-CAP2™ series. This surface mount device operates as a transistor driver for step-down topology applications with dual outputs and single phase configuration. The part is currently in active production status with 3935 units in stock. Alternative models are necessary when specific switching frequency requirements, control feature sets, or product lifecycle considerations necessitate component substitution within the same functional category and package specification.

Substiute Parts

TPS53126PWR

Texas InstrumentsIn Stock: 4014TPS53126PWR Datasheet

Current PartRFQ

TPS53128PWR

Texas InstrumentsIn Stock: 3277TPS53128PWR Datasheet

Parametric EquivalentRFQ

TPS53129PWR

Texas InstrumentsIn Stock: 3071TPS53129PWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPS53126PWR is determined by strict equivalence across the following core parameters: manufacturer (Texas Instruments), product category (Power Management PMIC), package type (24-TSSOP), topology (Buck), output configuration (Positive, 2 outputs, 1 phase), supply voltage range (4.5V ~ 24V), synchronous rectifier capability (Yes), and operating temperature range (-40°C ~ 85°C).

The identified substitute parts maintain these core electrical and mechanical specifications. Variations exist in switching frequency options (350kHz vs. 700kHz) and control feature sets (Enable and Frequency Control vs. Current Limit, Enable, and Soft Start). These variations do not prevent substitution when the application requirements align with the specific frequency and control feature profile of the substitute device. Product status differences are noted for design lifecycle considerations.

Parameter Comparison

Engineering Selection Recommendations

TPS53126PWR is the primary selection for active new designs requiring dual switching frequency capability (350kHz and 700kHz options) with Enable and Frequency Control features. This part maintains full active production status and maximum inventory availability.

TPS53128PWR serves as a direct substitute when application requirements specify 350kHz switching frequency operation. This device remains in active production status and provides expanded control features including Current Limit and Soft Start alongside Enable functionality. Inventory levels support production deployment.

TPS53129PWR is designated "Not For New Designs" and should be selected only when existing designs or legacy systems require 700kHz switching frequency operation with Current Limit, Enable, and Soft Start control features. This part remains available in inventory but is not recommended for new product development initiatives.

All three devices maintain identical compliance certifications (ROHS3, REACH Unaffected, EAR99 ECCN classification) and packaging specifications, ensuring mechanical and regulatory interchangeability within the specified parameter constraints.

Frequently Asked Questions (FAQ)

Q: Can TPS53128PWR replace TPS53126PWR in all applications?

A: TPS53128PWR is electrically and mechanically compatible with TPS53126PWR when the application operates at 350kHz switching frequency. If your design requires 700kHz operation, TPS53128PWR is not suitable. Verify your switching frequency requirement before substitution.

Q: What is the primary difference between TPS53126PWR and TPS53129PWR?

A: The primary difference is switching frequency: TPS53126PWR supports both 350kHz and 700kHz, while TPS53129PWR operates at 700kHz only. Additionally, TPS53129PWR carries "Not For New Designs" status. Both maintain identical package, topology, and supply voltage specifications.

Q: Are all three parts in the same package?

A: Yes. TPS53126PWR, TPS53128PWR, and TPS53129PWR all use 24-TSSOP packaging (0.173", 4.40mm Width) with identical pinout and mechanical dimensions, enabling direct board-level substitution.

Q: Which part should I select for a new design?

A: TPS53126PWR is the recommended selection for new designs due to its active production status and dual frequency capability. TPS53128PWR is acceptable if your design is locked to 350kHz operation. TPS53129PWR should not be used for new designs.

Q: Do all three parts meet the same compliance standards?

A: Yes. TPS53126PWR, TPS53128PWR, and TPS53129PWR are all ROHS3 Compliant, REACH Unaffected, and classified under EAR99 ECCN. Moisture Sensitivity Level is 1 (Unlimited) for all three devices.

Q: What control features differ between these parts?

A: TPS53126PWR provides Enable and Frequency Control. TPS53128PWR and TPS53129PWR provide Current Limit, Enable, and Soft Start. Select based on your circuit control requirements.