TLE42702SAKSA1 Equivalent & Substitute Parts

Part Overview

The TLE42702SAKSA1 is a linear voltage regulator IC from Infineon Technologies' OPTIREG™ series, designed for positive fixed 5V output at 650mA in a TO-220-5 through-hole package. This part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The device is qualified to AEC-Q100 automotive standards and includes comprehensive protection features including over-current, over-temperature, over-voltage, reverse polarity, and short-circuit protection.

Substiute Parts

TLE42702SAKSA1

Infineon TechnologiesIn Stock: 739TLE42702SAKSA1 Datasheet

Current PartRFQ

TLE42702GATMA1

Infineon TechnologiesIn Stock: 2454TLE42702GATMA1 Datasheet

MFR RecommendedRFQ

LT1129IT-5#PBF

Analog Devices Inc.In Stock: 1161LT1129IT-5#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLE42702SAKSA1 is determined by the following critical parameters:

Output voltage (5V fixed), output current capability (minimum 650mA), maximum input voltage rating (42V or higher), voltage dropout specification (0.7V @ 550mA or better), operating temperature range (-40°C to 150°C minimum), automotive grade qualification (AEC-Q100), and protection feature set (over-current, over-temperature, over-voltage, reverse polarity, short-circuit).

Two substitute parts meet these criteria:

TLE42702GATMA1 (Infineon Technologies): Identical electrical specifications with package change from TO-220-5 through-hole to TO-263-5-1 surface mount. Active product status with higher inventory availability. Maintains all protection features and automotive qualification.

LT1129IT-5#PBF (Analog Devices Inc.): Meets core electrical requirements with higher output current capability (700mA), improved quiescent current (70µA vs 1.5mA), and superior PSRR (64dB @ 120Hz vs 54dB @ 100Hz). Maintains TO-220-5 through-hole package compatibility. Input voltage rating reduced to 30V maximum. Protection feature set is reduced (over-temperature and reverse polarity only). Operating temperature range limited to -40°C ~ 125°C.

Parameter Comparison

Engineering Selection Recommendations

TLE42702GATMA1 is the manufacturer-recommended substitute for new designs requiring direct electrical equivalence. This part maintains identical electrical specifications, automotive grade qualification, and AEC-Q100 certification. The transition from through-hole to surface-mount packaging requires PCB redesign but eliminates obsolescence risk with active product status and superior inventory availability (2400 pcs vs 728 pcs).

LT1129IT-5#PBF provides an alternative for applications where through-hole mounting must be retained and input voltage does not exceed 30V. This part offers improved quiescent current performance and higher output current capability. However, the reduced protection feature set (absence of over-current, over-voltage, and transient voltage protection), lack of automotive grade designation, and lower maximum operating temperature (-40°C ~ 125°C vs -40°C ~ 150°C) restrict its use to non-automotive applications or designs where these limitations are acceptable.

Frequently Asked Questions (FAQ)

Q: Can TLE42702GATMA1 directly replace TLE42702SAKSA1 in existing designs?

A: Electrical substitution is direct. PCB redesign is required due to package change from TO-220-5 through-hole to TO-263-5-1 surface mount. Both parts maintain identical output voltage (5V), current rating (650mA), input voltage rating (42V), dropout voltage (0.7V @ 550mA), and protection features.

Q: What are the key differences between TLE42702GATMA1 and LT1129IT-5#PBF?

A: TLE42702GATMA1 maintains the original TO-220-5 through-hole package and automotive AEC-Q100 qualification. LT1129IT-5#PBF retains through-hole mounting but has a 30V maximum input voltage (vs 42V), reduced protection features, and no automotive qualification. LT1129IT-5#PBF offers lower quiescent current (70µA vs 1.5mA) and higher output current (700mA vs 650mA).

Q: Is LT1129IT-5#PBF suitable for automotive applications?

A: LT1129IT-5#PBF lacks automotive grade designation and AEC-Q100 qualification. Use in automotive applications requires design review and validation against specific application requirements. The reduced protection feature set and lower maximum operating temperature may not meet automotive standards.

Q: What is the impact of the package change from TO-220-5 to TO-263-5-1?

A: TO-263-5-1 (D2PAK) is a surface-mount package with different pin configuration and thermal characteristics compared to TO-220-5 through-hole. PCB layout, mounting method, and thermal management design must be updated. Electrical functionality remains identical.

Q: Can I use LT1129IT-5#PBF in applications with input voltages above 30V?

A: No. LT1129IT-5#PBF has a maximum input voltage rating of 30V. Exceeding this rating violates device specifications. For applications requiring 42V input capability, use TLE42702GATMA1 or TLE42702SAKSA1.

Q: What is the inventory status for each substitute?

A: TLE42702SAKSA1 (original): 728 pcs. TLE42702GATMA1: 2400 pcs. LT1129IT-5#PBF: 1110 pcs. TLE42702GATMA1 offers the highest availability for new production orders.