BTS728L2 Equivalent & Substitute Parts

Part Overview

The BTS728L2 is a Power Switch/Driver IC from Infineon Technologies' PROFET® series, designed for high-side N-channel switching applications. This component operates as a 1:1 power switch with integrated fault protection, supporting load voltages from 4.75V to 41V and delivering up to 3.6A output current. The device is currently classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations.

Substiute Parts

BTS728L2

Infineon TechnologiesIn Stock: 28982BTS728L2 Datasheet

Current PartRFQ

BTS740S2XUMA1

Infineon TechnologiesIn Stock: 1709BTS740S2XUMA1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BTS728L2 is determined by strict alignment of electrical and mechanical parameters within the PROFET® power switch family. The primary substitute, BTS740S2XUMA1, maintains functional equivalence through the following criteria:

Core Substitution Parameters:

• Identical output configuration: High-side, N-channel, 1:1 ratio, 2 outputs
• Compatible package: 20-SOIC form factor with identical pin pitch and dimensions
• Matching interface: On/Off control with non-inverting input
• Equivalent fault protection architecture: Current limiting, open load detection, over-temperature, and over-voltage protection
• Overlapping thermal operating range: -40°C to 150°C junction temperature
• Same series family: PROFET® platform ensures pin-compatible design integration

Electrical Performance Considerations: The BTS740S2XUMA1 demonstrates enhanced electrical characteristics within compatible parameters: maximum output current increases from 3.6A to 4.9A, and on-resistance decreases from 50mOhm to 27mOhm. These improvements maintain backward compatibility while offering superior performance margins for existing circuit designs.

Load Voltage Range: The substitute operates within a narrower load voltage specification (5V ~ 34V) compared to the original part (4.75V ~ 41V). Applications requiring operation below 5V or above 34V require circuit-level evaluation.

Parameter Comparison

Engineering Selection Recommendations

For Active System Support: The BTS740S2XUMA1 is the designated substitute for the obsolete BTS728L2. This part maintains pin-compatible integration within existing PCB layouts and provides active product status with ongoing manufacturer support. The substitute is ROHS3 compliant and carries AEC-Q100 automotive qualification, addressing regulatory and quality requirements for modern applications.

Load Voltage Consideration: Designs operating the original BTS728L2 below 5V or above 34V require evaluation against the substitute's narrower voltage specification. Circuits within the 5V to 34V range operate with full compatibility and benefit from improved electrical performance.

Compliance Status: The transition from RoHS non-compliant to ROHS3 compliant status aligns with current environmental regulations. Automotive-grade qualification of the substitute supports applications requiring AEC-Q100 certification.

Frequently Asked Questions (FAQ)

Q: Is the BTS740S2XUMA1 a direct pin-for-pin replacement for the BTS728L2?

A: Yes. Both components use the 20-SOIC package with identical pin pitch and dimensions. The pin configuration, control interface (On/Off, non-inverting), and output structure (high-side, N-channel, 2 outputs) are functionally equivalent, enabling direct PCB substitution without layout modification.

Q: What are the key electrical differences between these parts?

A: The BTS740S2XUMA1 offers improved performance: maximum output current increases from 3.6A to 4.9A, and on-resistance decreases from 50mOhm to 27mOhm. Load voltage specification narrows from 4.75V~41V to 5V~34V. Both parts maintain identical fault protection features and thermal operating range.

Q: Can the BTS740S2XUMA1 be used in applications requiring operation below 5V or above 34V?

A: The substitute's load voltage specification is 5V ~ 34V. Applications requiring operation outside this range require circuit-level analysis to determine compatibility. The original BTS728L2 specification of 4.75V ~ 41V may be necessary for such designs.

Q: What is the significance of the automotive grade and AEC-Q100 qualification on the substitute?

A: The BTS740S2XUMA1 carries automotive-grade classification and AEC-Q100 qualification, indicating compliance with automotive industry reliability and quality standards. The original BTS728L2 does not specify these qualifications. This upgrade supports applications requiring automotive-level component certification.

Q: Does the change from RoHS non-compliant to ROHS3 compliant affect compatibility?

A: ROHS3 compliance on the BTS740S2XUMA1 reflects current environmental regulations and does not affect electrical or mechanical compatibility. This status upgrade aligns the component with modern regulatory requirements for new designs and system updates.

Q: Are there any thermal or reliability differences between these parts?

A: Both components operate across the identical thermal range (-40°C to 150°C junction temperature) and implement equivalent fault protection mechanisms. The substitute's lower on-resistance (27mOhm vs. 50mOhm) results in reduced power dissipation, potentially improving thermal performance in equivalent applications.

Q: What packaging options are available for the BTS740S2XUMA1?

A: The substitute is available in Cut Tape (CT) and Digi-Reel® packaging formats, supporting both prototype and production volume requirements.