TLE42344GHTSA1 Equivalent & Substitute Parts

Part Overview

The TLE42344GHTSA1 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. This automotive-grade component (AEC-Q100 qualified) provides regulated power with integrated protection against overcurrent, overtemperature, and reverse polarity conditions. The part is currently in Last Time Buy status, making equivalent substitutes necessary for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	5V
Output Current	100mA
Input Voltage (Max)	45V
Dropout Voltage	0.5V @ 100mA
Quiescent Current	400 µA
Operating Temperature	-40°C to 150°C
Package	SOT223-4 (TO-261-4)
Grade	Automotive (AEC-Q100)
Protection Features	Over Current, Over Temperature, Reverse Polarity

Substitute Part Grouping Explanation

Substitution eligibility for the TLE42344GHTSA1 is determined by the following critical parameters:

Output voltage and current rating: 5V fixed output with minimum 100mA capability
Package compatibility: SOT223-4 (TO-261-4) surface-mount form factor
Input voltage tolerance: Maximum input voltage of 40V or higher
Automotive qualification: AEC-Q100 certification for automotive-grade applications
Protection features: Overcurrent and overtemperature protection as baseline requirements
Operating temperature range: -40°C to 150°C minimum

Substitute parts are grouped into two categories:

Category A - Direct Automotive Replacements (Preferred): Parts meeting all automotive qualifications and maintaining identical electrical specifications.

Category B - Functional Equivalents: Parts with compatible electrical characteristics but differing in quiescent current, PSRR performance, or output current capacity, suitable for applications where the TLE42344GHTSA1's specific performance metrics are not critical.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage	Quiescent Current	Operating Temp	AEC-Q100	Package	Status
TLE42344GHTSA1	Infineon	5V	100mA	45V	0.5V @ 100mA	400 µA	-40 to 150°C	Yes	SOT223-4	Last Time Buy
TLE42644GHTMA1	Infineon	5V	100mA	40V	0.5V @ 100mA	70 µA	-40 to 150°C	Yes	SOT223-4	Active
NCV4264-2ST50T3G	onsemi	5V	100mA	45V	0.5V @ 100mA	55 µA	-40 to 150°C	Yes	SOT223-4	Not For New Designs
TPS7B6950QDCYRQ1	Texas Instruments	5V	150mA	40V	0.8V @ 100mA	25 µA	-40 to 150°C	Yes	SOT223-4	Active
SPX2954M3-L-5-0/TR	MaxLinear	5V	250mA	30V	0.5V @ 250mA	170 µA	-40 to 125°C	No	SOT223-3	Active
SPX3940M3-L-5-0/TR	MaxLinear	5V	1A	16V	0.55V @ 1A	Not specified	-40 to 125°C	No	SOT223-3	Active

Engineering Selection Recommendations

For automotive applications requiring AEC-Q100 compliance:

TLE42644GHTMA1 (Infineon) is the primary substitute. It maintains automotive qualification, identical output specifications, and improved quiescent current performance (70 µA vs. 400 µA). The reduced input voltage maximum (40V vs. 45V) is acceptable for most automotive 12V/24V systems. Active product status ensures long-term availability.

TPS7B6950QDCYRQ1 (Texas Instruments) is an alternative automotive-qualified option with superior quiescent current (25 µA) and higher output current capability (150mA). The slightly higher dropout voltage (0.8V @ 100mA) and reduced maximum input voltage (40V) should be verified against circuit requirements.

For non-automotive applications or where higher output current is beneficial:

SPX2954M3-L-5-0/TR and SPX2954AM3-L-5-0/TR (MaxLinear) provide 250mA output capability with active product status. These parts lack automotive qualification and operate to 125°C maximum, limiting use to industrial or consumer applications. The 30V maximum input voltage is suitable for standard regulated supplies.

SPX3940M3-L-5-0/TR (MaxLinear) offers 1A output current for applications requiring higher current delivery, though the 16V maximum input voltage restricts use to low-voltage systems.

Avoid for new designs:

NCV4264-2ST50T3G (onsemi) carries "Not For New Designs" status despite maintaining automotive qualification and matching electrical specifications. This designation indicates manufacturer discontinuation planning.

Frequently Asked Questions (FAQ)

Q: Can TLE42644GHTMA1 directly replace TLE42344GHTSA1 in automotive applications?

A: Yes. Both parts are Infineon automotive-grade regulators with AEC-Q100 qualification, identical 5V/100mA output specifications, and SOT223-4 packaging. The TLE42644GHTMA1 features lower quiescent current (70 µA vs. 400 µA), reducing standby power consumption. The maximum input voltage is reduced from 45V to 40V, which is acceptable for 12V and 24V automotive systems.

Q: Why do some substitutes have higher output current ratings (250mA, 1A)?

A: Higher-rated parts provide design flexibility for applications requiring increased current delivery while maintaining the same 5V output and package form factor. These are suitable when the original 100mA specification is insufficient, though they may introduce different quiescent current and dropout characteristics.

Q: What is the significance of AEC-Q100 qualification?

A: AEC-Q100 certification indicates the component meets automotive industry reliability and quality standards, including temperature cycling, vibration, and moisture resistance testing. This qualification is mandatory for automotive-grade applications and ensures long-term field reliability in vehicle environments.

Q: Are MaxLinear SPX parts suitable for automotive use?

A: SPX2954 and SPX3940 series parts lack automotive qualification and AEC-Q100 certification. They are suitable for industrial and consumer applications but should not be used in automotive designs requiring compliance with automotive standards.

Q: How does quiescent current affect system design?

A: Quiescent current represents the regulator's internal power consumption when delivering no load current. Lower quiescent current (TPS7B6950QDCYRQ1 at 25 µA, NCV4264-2ST50T3G at 55 µA) reduces standby power drain, beneficial for battery-powered or always-on systems. The original TLE42344GHTSA1 at 400 µA is higher, making substitutes with lower Iq advantageous for power-sensitive applications.

Q: Can I use TPS7B6950QDCYRQ1 if my circuit operates above 40V input?

A: No. TPS7B6950QDCYRQ1 has a maximum input voltage of 40V. If your application requires 45V input tolerance, use TLE42644GHTMA1 (40V max, verify acceptability) or NCV4264-2ST50T3G (45V max, though marked "Not For New Designs").

Q: What package considerations apply to these substitutes?

A: All listed automotive-qualified substitutes (TLE42644GHTMA1, NCV4264-2ST50T3G, TPS7B6950QDCYRQ1) use SOT223-4 packaging, identical to the original TLE42344GHTSA1. MaxLinear parts use SOT223-3 packaging, which has different pinout and is not a direct mechanical substitute without PCB redesign.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message