TLE42664G Equivalent & Substitute Parts

Part Overview

The TLE42664G is a linear voltage regulator IC from Infineon Technologies' OPTIREG™ series, delivering a fixed 5V output at 100mA in a surface-mount SOT223-4 package. Designed for automotive applications with AEC-Q100 qualification, this component integrates over-current, over-temperature, reverse polarity, and short-circuit protection with an enable control feature.

The TLE42664G is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support long-term product availability for applications currently using this regulator.

Substiute Parts

TLE42664G

Infineon TechnologiesIn Stock: 29230TLE42664G Datasheet

Current PartRFQ

TLE42664GHTMA2

Infineon TechnologiesIn Stock: 10489TLE42664GHTMA2 Datasheet

Parametric EquivalentRFQ

LM340MP-5.0/NOPB

Texas InstrumentsIn Stock: 25265LM340MP-5.0/NOPB Datasheet

MFR RecommendedRFQ

LM340MPX-5.0/NOPB

Texas InstrumentsIn Stock: 20838LM340MPX-5.0/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TLE42664G is determined by the following critical parameters:

Electrical Compatibility: Output voltage (5V fixed), output configuration (positive), and package type (SOT223-4) must match or be compatible with the original design.

Mechanical Compatibility: Surface-mount package TO-261-4 / TO-261AA ensures pin-compatible replacement without PCB redesign.

Performance Criteria: Output current capability, dropout voltage, input voltage rating, and protection features determine functional equivalence.

Compliance & Certification: Automotive-grade components with AEC-Q100 qualification are preferred for applications requiring automotive standards.

Substitute parts are grouped into two categories:

1. Parametric Equivalent (Same Manufacturer): TLE42664GHTMA2 — identical electrical and mechanical specifications with active product status.

2. Manufacturer Recommended Alternatives (Cross-Manufacturer): LM340MP-5.0/NOPB and LM340MPX-5.0/NOPB — higher output current capability (1.5A) with compatible package and voltage output, suitable for designs with increased current headroom.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Obsolete to Active):

TLE42664GHTMA2 is the primary substitute. It maintains identical electrical specifications, automotive-grade qualification, and AEC-Q100 certification. The part is currently in active production status with 10,400 units in stock. This option requires no design modification and preserves all original performance characteristics, including the lower quiescent current (60 µA) and superior dropout voltage (0.5V @ 100mA).

For Designs Requiring Higher Current Capacity:

LM340MP-5.0/NOPB and LM340MPX-5.0/NOPB provide 1.5A output current capability, offering 15× the current headroom of the original TLE42664G. Both parts are pin-compatible in the SOT-223-4 package and deliver the same 5V output. These alternatives are suitable for applications where current requirements may increase or where design margin is prioritized. Both parts are ROHS3 compliant and in active production.

Compliance Considerations:

For automotive applications requiring AEC-Q100 qualification, TLE42664GHTMA2 is the recommended choice. The Texas Instruments LM340 variants do not specify automotive qualification in the provided data and operate over a narrower temperature range (0°C to 125°C versus -40°C to 150°C), making them less suitable for extended automotive temperature environments.

Frequently Asked Questions (FAQ)

Q: Can TLE42664GHTMA2 be used as a direct drop-in replacement for TLE42664G?

A: Yes. TLE42664GHTMA2 is electrically and mechanically identical to TLE42664G. It shares the same output voltage (5V), output current (100mA), package (TO-261-4 / PG-SOT223-4), operating temperature range (-40°C to 150°C), and protection features. The primary difference is product status: TLE42664GHTMA2 is active and currently in production, while TLE42664G is obsolete.

Q: What are the key differences between TLE42664G and the LM340 variants?

A: The LM340MP-5.0/NOPB and LM340MPX-5.0/NOPB deliver higher output current (1.5A versus 100mA) and slightly better PSRR (70dB at 120Hz versus 68dB at 100Hz). However, they have higher dropout voltage (2V @ 1A versus 0.5V @ 100mA), higher quiescent current (8 mA versus 60 µA), and operate over a narrower temperature range (0°C to 125°C). The LM340 variants lack specified automotive qualification.

Q: Are the LM340 parts suitable for automotive applications?

A: The provided data does not specify automotive qualification or AEC-Q100 certification for the LM340MP-5.0/NOPB or LM340MPX-5.0/NOPB. For applications requiring automotive-grade components, TLE42664GHTMA2 is the appropriate choice.

Q: Can I use LM340MP-5.0/NOPB in place of TLE42664G without PCB changes?

A: Yes, from a package perspective. Both parts use the TO-261-4 / SOT-223-4 package with identical pinouts, enabling direct PCB compatibility. However, electrical performance differs: the LM340 has higher dropout voltage and quiescent current, which may affect circuit behavior in low-input-voltage or low-power applications.

Q: What is the difference between LM340MP-5.0/NOPB and LM340MPX-5.0/NOPB?

A: Both parts are electrically identical with the same output voltage (5V), output current (1.5A), dropout voltage (2V @ 1A), and operating temperature range (0°C to 125°C). The difference lies in packaging format: LM340MP-5.0/NOPB is supplied in Cut Tape (CT) & Digi-Reel®, while LM340MPX-5.0/NOPB is also supplied in Cut Tape (CT) & Digi-Reel®. Both are ROHS3 compliant and in active production.

Q: Which substitute should I choose for a new design?

A: For new designs requiring 100mA output at 5V with automotive qualification, use TLE42664GHTMA2. For designs needing higher current capacity (1.5A) without strict automotive requirements, either LM340MP-5.0/NOPB or LM340MPX-5.0/NOPB is acceptable. Verify operating temperature requirements: if your application requires operation below 0°C or above 125°C, TLE42664GHTMA2 is mandatory.