TLE4251DATMA1 Equivalent & Substitute Parts

Part Overview

The TLE4251DATMA1 is a linear voltage regulator IC from Infineon Technologies' OPTIREG™ series, designed for positive adjustable output applications with 400mA current capability. This automotive-grade component (AEC-Q100 qualified) provides integrated protection features including over-current, over-temperature, reverse polarity, and short-circuit protection. The part is currently in active production status. Substitute parts are identified when the original TLE4251DATMA1 becomes unavailable, reaches end-of-life, or when design requirements necessitate alternative sourcing from qualified manufacturers.

Substiute Parts

TLE4251DATMA1

Infineon TechnologiesIn Stock: 2700TLE4251DATMA1 Datasheet

Current PartRFQ

NCV4276BDTADJRKG

onsemiIn Stock: 33292NCV4276BDTADJRKG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TLE4251DATMA1 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Output configuration (Positive)
• Output type (Adjustable)
• Current output capability (400mA minimum)
• Maximum input voltage (40V or higher)
• Package type (TO-252-5 / DPAK compatible)
• Automotive grade qualification (AEC-Q100)
• Operating temperature range (-40°C to 150°C minimum)
• Control features (Enable function)

Acceptable Variation Parameters:

• Voltage dropout (lower values acceptable)
• Quiescent current (lower values acceptable)
• PSRR performance (equal or better acceptable)
• Protection features (additional features acceptable; core features must be present)

The NCV4276BDTADJRKG from onsemi meets these substitution criteria with compatible electrical specifications and identical package configuration, though it carries a "Not For New Designs" status.

Parameter Comparison

Engineering Selection Recommendations

The TLE4251DATMA1 is the primary selection for new designs due to its active product status and full automotive qualification. The NCV4276BDTADJRKG serves as a qualified substitute when the primary part is unavailable, with electrical performance that meets or exceeds the original specification in key parameters (lower dropout voltage, lower quiescent current, higher PSRR). Both parts carry identical AEC-Q100 automotive qualification and ROHS3 compliance, ensuring compatibility in automotive applications. The NCV4276BDTADJRKG's "Not For New Designs" status indicates it is suitable for legacy system support and replacement applications only.

Frequently Asked Questions (FAQ)

Q: Can the NCV4276BDTADJRKG be used as a direct replacement for the TLE4251DATMA1?

A: Yes, the NCV4276BDTADJRKG is electrically and mechanically compatible. Both parts share identical output configuration, current rating, package type, and automotive qualification. Pin-to-pin compatibility is maintained in the TO-252-5 DPAK package.

Q: What are the key differences between these parts?

A: The NCV4276BDTADJRKG offers improved performance in three areas: lower maximum input voltage rating (45V vs 40V), lower dropout voltage (0.5V @ 250mA vs 0.52V @ 300mA), and lower quiescent current (200 µA vs 300 µA). PSRR performance is also superior (70dB vs 60dB at 100Hz).

Q: Why is the NCV4276BDTADJRKG marked "Not For New Designs"?

A: This designation indicates the part is in mature or declining production phase. It remains available for existing applications and legacy system support but is not recommended for new product development. The TLE4251DATMA1 should be selected for new designs.

Q: Are both parts suitable for automotive applications?

A: Yes, both parts carry AEC-Q100 automotive qualification and operate across the -40°C to 150°C temperature range required for automotive environments.

Q: What protection features are included in both parts?

A: The TLE4251DATMA1 includes over-current, over-temperature, reverse polarity, and short-circuit protection. The NCV4276BDTADJRKG includes over-temperature, reverse polarity, and short-circuit protection. Both provide essential circuit protection for automotive applications.

Q: Is the package compatibility guaranteed?

A: Yes, both parts use the TO-252-5 DPAK package with identical pinout and lead configuration, ensuring direct PCB compatibility without layout modifications.