TPS2066AD Equivalent & Substitute Parts

Part Overview

The TPS2066AD is a Power Management IC (PMIC) manufactured by Texas Instruments, functioning as a power switch/driver with 1:2 input-to-output ratio and N-Channel high-side output configuration. This device delivers 1A maximum output current with 70mOhm typical on-resistance and includes integrated status flag and comprehensive fault protection (current limiting, over-temperature, and UVLO). The TPS2066AD is classified as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs or design revisions.

Substiute Parts

TPS2066AD

Texas InstrumentsIn Stock: 1299TPS2066AD Datasheet

Current PartRFQ

TPS2066DR

Texas InstrumentsIn Stock: 12782TPS2066DR Datasheet

MFR RecommendedRFQ

TPS2062D

Texas InstrumentsIn Stock: 3492TPS2062D Datasheet

Parametric EquivalentRFQ

TPS2066D

Texas InstrumentsIn Stock: 2137TPS2066D Datasheet

Parametric EquivalentRFQ

AP2172SG-13

Diodes IncorporatedIn Stock: 3841AP2172SG-13 Datasheet

MFR RecommendedRFQ

BD2066FJ-LBE2

Rohm SemiconductorIn Stock: 4105BD2066FJ-LBE2 Datasheet

MFR RecommendedRFQ

NCP382HD05AAR2G

onsemiIn Stock: 2437NCP382HD05AAR2G Datasheet

MFR RecommendedRFQ

TPS2022D

Texas InstrumentsIn Stock: 2007TPS2022D Datasheet

Parametric EquivalentRFQ

TPS2032D

Texas InstrumentsIn Stock: 2189TPS2032D Datasheet

Parametric EquivalentRFQ

TPS2061D

Texas InstrumentsIn Stock: 2167TPS2061D Datasheet

Parametric EquivalentRFQ

TPS2062AD

Texas InstrumentsIn Stock: 3227TPS2062AD Datasheet

Parametric EquivalentRFQ

TPS2065D

Texas InstrumentsIn Stock: 1075TPS2065D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPS2066AD is determined by the following critical parameters:

Primary Substitution Criteria (Exact Match Required):

• Number of Outputs: 2
• Ratio - Input:Output: 1:2
• Output Configuration: High Side
• Voltage - Load: 2.7V ~ 5.5V
• Current - Output (Max): ≥ 1A
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Interface: On/Off
• Fault Protection: Current Limiting (Fixed), Over Temperature, UVLO

Secondary Substitution Criteria (Flexible Within Limits):

• Output Type: N-Channel preferred; P-Channel acceptable with design review
• Rds On (Typ): ≤ 120mOhm
• Operating Temperature: Minimum -40°C to 125°C coverage
• Input Type: Non-Inverting preferred
• Features: Status Flag required

Substitute parts are grouped into three categories:

Category 1: Direct Equivalents (Identical Specifications) Parts with matching output type (N-Channel), identical 1:2 ratio, 1A output current, and 8-SOIC package. These require no design modifications.

Category 2: Parametric Equivalents (Functional Compatibility) Parts with 1:2 ratio and 8-SOIC package but differing in output type (P-Channel), output current (higher ratings), or Rds On values. These maintain functional compatibility within the 2.7V ~ 5.5V load voltage range.

Category 3: Functional Alternatives (Different Topology) Parts with 1:1 ratio instead of 1:2, requiring circuit redesign but offering compatible package and electrical characteristics for alternative implementations.

Parameter Comparison

Engineering Selection Recommendations

Tier 1: Recommended Direct Replacements (No Design Changes Required)

TPS2066DR, TPS2062D, TPS2066D, and TPS2062AD are all Active status parts from Texas Instruments with identical electrical specifications to the TPS2066AD. These parts maintain the same 1:2 ratio, N-Channel output type, 1A current rating, 70mOhm on-resistance, and 8-SOIC package. All are ROHS3 compliant with MSL 1 rating. TPS2066DR is available in Cut Tape and Digi-Reel packaging with highest inventory (12,720 pcs), making it the primary recommendation for volume production. TPS2062D and TPS2062AD offer equivalent performance with Tube packaging and substantial inventory levels (3,400 and 3,200 pcs respectively).

Tier 2: Parametric Equivalents (Design Review Required)

BD2066FJ-LBE2 (Rohm Semiconductor) maintains N-Channel output and 1:2 ratio with higher current capability (1.5A) and slightly higher on-resistance (80mOhm). Operating temperature range is reduced to -40°C ~ 85°C (TA). This part is suitable for applications not requiring the full -40°C ~ 125°C (TJ) range and where higher current headroom is beneficial.

AP2172SG-13 (Diodes Incorporated) and NCP382HD05AAR2G (onsemi) are P-Channel alternatives with 1:2 ratio and 8-SOIC package. AP2172SG-13 maintains 1A current rating but increases on-resistance to 120mOhm and reduces operating temperature to -40°C ~ 85°C (TA). NCP382HD05AAR2G reduces output current to 500mA, making it unsuitable for 1A load requirements. Both P-Channel parts require circuit topology modifications and are not recommended as direct substitutes.

Tier 3: Functional Alternatives (Circuit Redesign Required)

TPS2022D, TPS2032D, and TPS2061D are 1:1 ratio parts with identical 1A current and 8-SOIC package but different input-output topology. These require complete circuit redesign and are not suitable as drop-in replacements for 1:2 applications.

Frequently Asked Questions (FAQ)

Q: Can I use TPS2066DR as a direct replacement for TPS2066AD?

A: Yes. TPS2066DR is electrically and functionally identical to TPS2066AD with matching 1:2 ratio, N-Channel output, 1A current, 70mOhm on-resistance, and 8-SOIC package. The primary difference is packaging format (Cut Tape/Digi-Reel vs. Tube) and product status (Active vs. Last Time Buy). No design modifications are required.

Q: What is the difference between TPS2066D and TPS2062D?

A: Both parts are functionally equivalent with identical electrical specifications (1:2 ratio, N-Channel, 1A, 70mOhm, 8-SOIC). The difference lies in the base product number designation (TPS2066 vs. TPS2062) and inventory availability. Either part is suitable as a replacement for TPS2066AD.

Q: Can I substitute the TPS2066AD with a P-Channel part like AP2172SG-13?

A: P-Channel substitution requires circuit topology modifications. While AP2172SG-13 maintains the 1:2 ratio and 8-SOIC package, the P-Channel output configuration operates differently than the N-Channel TPS2066AD. Additionally, AP2172SG-13 has higher on-resistance (120mOhm vs. 70mOhm) and reduced operating temperature range (-40°C ~ 85°C vs. -40°C ~ 125°C). Design review and validation testing are mandatory before implementation.

Q: Why is NCP382HD05AAR2G not recommended as a substitute?

A: NCP382HD05AAR2G has reduced output current capability (500mA vs. 1A), making it unsuitable for applications requiring the full 1A rating of the TPS2066AD. While it maintains 1:2 ratio and 8-SOIC package, the current limitation creates a functional mismatch.

Q: What is the significance of the Last Time Buy status for TPS2066AD?

A: Last Time Buy status indicates the manufacturer will no longer produce this part after a specified date. Existing inventory may be available but will eventually deplete. Transitioning to Active status alternatives (TPS2066DR, TPS2062D, TPS2066D, or TPS2062AD) ensures long-term supply chain continuity for future production runs.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, matching the environmental compliance of the TPS2066AD.

Q: Can I use TPS2022D or TPS2032D as replacements?

A: No. These are 1:1 ratio parts, not 1:2. They require complete circuit redesign and are not suitable as drop-in replacements for applications designed around the 1:2 topology of the TPS2066AD.