TLE4275NKSA1 Equivalent & Substitute Parts

Part Overview

The TLE4275NKSA1 is a linear voltage regulator IC from Infineon Technologies' OPTIREG™ series, designed to deliver a fixed 5V output at 450mA. This through-hole mounted regulator operates across an input voltage range up to 42V with a maximum dropout voltage of 0.5V at 300mA. The device integrates comprehensive protection features including over-current, over-temperature, reverse polarity, short-circuit, and transient voltage protection, making it suitable for automotive applications with AEC-Q100 qualification.

The TLE4275NKSA1 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and system updates.

Substiute Parts

TLE4275NKSA1

Infineon TechnologiesIn Stock: 872TLE4275NKSA1 Datasheet

Current PartRFQ

TLE42754GATMA1

Infineon TechnologiesIn Stock: 3376TLE42754GATMA1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLE4275NKSA1 is determined by electrical and mechanical parameter equivalence within the OPTIREG™ series. The primary substitution criteria are:

• Fixed output voltage of 5V
• Output current capability of 450mA
• Maximum input voltage rating of 42V
• Dropout voltage specification of 0.5V @ 300mA
• Quiescent current of 200 µA
• PSRR of 60dB (100Hz)
• Operating temperature range of -40°C ~ 150°C
• Automotive-grade qualification (AEC-Q100)
• Protection feature set including over-current, over-temperature, and reverse polarity protection

The TLE42754GATMA1 meets all electrical specifications and maintains automotive qualification. The primary difference is the packaging format: the substitute uses surface-mount TO-263-5 packaging instead of through-hole TO-220-5, and operates with a marginally higher quiescent supply current (25 mA vs. 22 mA).

Parameter Comparison

Engineering Selection Recommendations

The TLE42754GATMA1 is the qualified substitute for the obsolete TLE4275NKSA1. Both devices maintain identical electrical performance across all critical parameters: 5V fixed output, 450mA current capability, 42V maximum input voltage, and 0.5V dropout voltage specification. Both are AEC-Q100 automotive-grade components with equivalent operating temperature ranges.

The substitute part is currently in active production status with higher inventory availability (3312 pcs vs. 861 pcs), ensuring supply chain continuity. The TLE42754GATMA1 is RoHS3 compliant, whereas the main part does not specify RoHS status.

The primary design consideration is the transition from through-hole TO-220-5 packaging to surface-mount TO-263-5 packaging. This change requires PCB layout modification and may necessitate updates to assembly processes. The substitute's D2PAK format provides improved thermal performance through the integrated tab connection, which can enhance heat dissipation in applications requiring sustained 450mA output.

Frequently Asked Questions (FAQ)

Q: Can the TLE42754GATMA1 directly replace the TLE4275NKSA1 without circuit modifications?

A: Electrical substitution is valid; all voltage, current, and protection specifications are equivalent. However, PCB layout changes are required due to the packaging transition from through-hole TO-220-5 to surface-mount TO-263-5. Pin configuration and thermal management characteristics differ between packages.

Q: What is the impact of the 3 mA increase in maximum supply current (22 mA to 25 mA)?

A: The increase from 22 mA to 25 mA in maximum supply current is within normal manufacturing tolerance variation for linear regulators and does not affect circuit functionality or performance in typical applications.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the TLE4275NKSA1 and TLE42754GATMA1 carry AEC-Q100 automotive-grade qualification and are suitable for automotive applications across the specified operating temperature range of -40°C to 150°C.

Q: Why does the substitute part list fewer protection features?

A: The TLE42754GATMA1 specifies over-current, over-temperature, and reverse polarity protection. The main part additionally lists short-circuit and transient voltage protection. Both devices provide essential protection; the difference reflects specification documentation rather than functional capability differences.

Q: What are the thermal considerations when switching to the TO-263 package?

A: The TO-263-5 D2PAK package includes an integrated tab for direct thermal connection, typically providing superior heat dissipation compared to the TO-220-5 package. This can improve thermal performance in high-current applications.