TLE4274GSV33HTSA1 Equivalent & Substitute Parts

Part Overview

The TLE4274GSV33HTSA1 is a linear voltage regulator IC from Infineon Technologies' OPTIREG™ series, delivering a fixed 3.3V output at 400mA in a surface-mount SOT223-4 package. This device is classified as obsolete, necessitating identification of active equivalent and substitute parts for new designs and production continuity. The part provides automotive-grade regulation with comprehensive protection features including over-current, over-temperature, reverse polarity, and short-circuit protection, qualified to AEC-Q100 standards.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
Output Current	400mA
Input Voltage (Max)	40V
Dropout Voltage	1.2V @ 300mA
Quiescent Current	220 µA
Operating Temperature Range	-40°C to 150°C
Package	SOT223-4 (TO-261-4, TO-261AA)
Grade	Automotive
Qualification	AEC-Q100
Protection Features	Over Current, Over Temperature, Reverse Polarity, Short Circuit

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Output Voltage: Must be fixed at 3.3V
Output Current Capability: Minimum 400mA required for direct replacement; lower-current alternatives acceptable only for reduced-load applications
Package Type: SOT223-4 (TO-261-4, TO-261AA) for pin-compatible substitution
Input Voltage Rating: Minimum 40V to maintain specification compliance
Operating Temperature Range: Must support -40°C to 150°C for automotive applications
Protection Features: Over-current and over-temperature protection required; reverse polarity and short-circuit protection preferred for automotive grade

Substitute parts are categorized as follows:

Direct Parametric Equivalent: TLE4274GSV33HTMA1 matches all electrical and thermal specifications with identical output current and dropout voltage characteristics.

Automotive-Grade Alternatives: NCV4274AST33T3G and NCV8664CST33T3G provide automotive qualification and AEC-Q100 compliance with comparable protection features.

General-Purpose Alternatives: LM2936MP-3.3/NOPB and LM2936MPX-3.3/NOPB offer active product status but with reduced output current (50mA) and lower operating temperature maximum (125°C), suitable only for lower-current applications.

Higher-Current Alternatives: SPX3940AM3-L-3-3/TR delivers 1A output current for applications requiring increased current capacity.

Intermediate-Current Alternatives: SPX2945M3-L-3-3/TR and SPX2954M3-L-3-3/TR provide 400mA and 250mA output respectively with active status.

Parameter Comparison

Part Number	Manufacturer	Output Current	Input Voltage (Max)	Dropout Voltage	Quiescent Current	Operating Temp Range	Product Status	AEC-Q100	Package
TLE4274GSV33HTSA1	Infineon	400mA	40V	1.2V @ 300mA	220 µA	-40°C to 150°C	Obsolete	Yes	SOT223-4
TLE4274GSV33HTMA1	Infineon	400mA	40V	1.2V @ 300mA	220 µA	-40°C to 150°C	Active	Yes	SOT223-4
NCV4274AST33T3G	onsemi	400mA	40V	1.27V @ 250mA	250 µA	-40°C to 150°C	Active	Yes	SOT223
NCV8664CST33T3G	onsemi	150mA	45V	Not specified	29 µA	-40°C to 150°C	Active	Yes	SOT223
SPX2945M3-L-3-3/TR	MaxLinear	400mA	26V	0.7V @ 400mA	300 µA	-40°C to 85°C	Active	No	SOT223-3
SPX3940AM3-L-3-3/TR	MaxLinear	1A	16V	0.55V @ 1A	Not specified	-40°C to 125°C	Active	No	SOT223-3
SPX2954M3-L-3-3/TR	MaxLinear	250mA	30V	0.5V @ 250mA	170 µA	-40°C to 125°C	Active	No	SOT223-3
LM2936MP-3.3/NOPB	Texas Instruments	50mA	40V	0.4V @ 50mA	15 µA	-40°C to 125°C	Active	No	SOT223-4
LM2936MPX-3.3/NOPB	Texas Instruments	50mA	40V	0.4V @ 50mA	15 µA	-40°C to 125°C	Active	No	SOT223-4
TPS7B6933QDCYRQ1	Texas Instruments	150mA	40V	0.8V @ 100mA	25 µA	-40°C to 150°C	Active	Yes	SOT223-4

Engineering Selection Recommendations

Primary Recommendation for Automotive Applications: TLE4274GSV33HTMA1 is the direct equivalent, maintaining identical electrical specifications, automotive grade classification, and AEC-Q100 qualification with active product status. This part provides seamless design continuity.

Automotive-Grade Alternative: NCV4274AST33T3G from onsemi delivers equivalent 400mA output current, automotive qualification, and AEC-Q100 compliance. Dropout voltage is marginally higher (1.27V vs 1.2V), and quiescent current is slightly elevated (250 µA vs 220 µA), but remains suitable for automotive applications within the full -40°C to 150°C operating range.

Reduced-Current Automotive Option: TPS7B6933QDCYRQ1 from Texas Instruments provides automotive-grade regulation with AEC-Q100 qualification and full temperature range support (-40°C to 150°C). Output current is limited to 150mA, restricting use to lower-current applications.

Non-Automotive Active Alternatives: SPX2945M3-L-3-3/TR and SPX2954M3-L-3-3/TR offer active product status with improved dropout voltage characteristics but lack automotive qualification and AEC-Q100 certification. These are suitable for industrial and commercial applications only.

Higher-Current Non-Automotive Option: SPX3940AM3-L-3-3/TR delivers 1A output for applications requiring increased current capacity but does not meet automotive qualification requirements.

Low-Current Options: LM2936MP-3.3/NOPB and LM2936MPX-3.3/NOPB are limited to 50mA output and lack automotive qualification, suitable only for low-power auxiliary circuits.

Frequently Asked Questions (FAQ)

Q: Can TLE4274GSV33HTMA1 be used as a direct replacement for TLE4274GSV33HTSA1?

A: Yes. TLE4274GSV33HTMA1 is a parametric equivalent with identical electrical specifications, output current (400mA), dropout voltage (1.2V @ 300mA), and operating temperature range (-40°C to 150°C). The primary difference is product status (Active vs Obsolete) and packaging format (Tape & Reel vs bulk). Pin configuration and SOT223-4 package are identical.

Q: Which substitute parts maintain automotive qualification?

A: TLE4274GSV33HTMA1, NCV4274AST33T3G, NCV8664CST33T3G, and TPS7B6933QDCYRQ1 all carry automotive grade classification and AEC-Q100 qualification. All other alternatives lack automotive certification.

Q: What is the minimum output current requirement for a direct replacement?

A: The original part delivers 400mA. Direct replacement requires equivalent or higher output current capability. NCV4274AST33T3G matches this specification. Parts with lower output current (NCV8664CST33T3G at 150mA, LM2936 series at 50mA) are suitable only for applications with reduced current demands.

Q: Are SOT223-3 packages compatible with SOT223-4 designs?

A: SOT223-3 and SOT223-4 packages have different pin configurations. SOT223-4 includes a separate ground pin, while SOT223-3 combines ground with another function. Direct PCB substitution is not possible without layout modification. SPX2945M3-L-3-3/TR, SPX2954M3-L-3-3/TR, and SPX3940AM3-L-3-3/TR use SOT223-3 packaging and require circuit redesign.

Q: What is the significance of dropout voltage differences?

A: Dropout voltage determines the minimum input-to-output voltage differential required for regulation. The original part specifies 1.2V @ 300mA. Lower dropout voltage (such as 0.7V in SPX2945M3-L-3-3/TR or 0.55V in SPX3940AM3-L-3-3/TR) allows operation with lower input voltages. Higher dropout voltage requires greater input voltage headroom.

Q: Can non-automotive-qualified parts be used in automotive applications?

A: Non-automotive parts lack AEC-Q100 qualification and automotive-grade testing. Use in automotive applications requires engineering justification and risk assessment. Automotive-qualified alternatives (TLE4274GSV33HTMA1, NCV4274AST33T3G, TPS7B6933QDCYRQ1) are recommended for automotive designs.

Q: What is the impact of quiescent current differences?

A: Quiescent current affects standby power consumption. The original part draws 220 µA. Lower quiescent current (LM2936 series at 15 µA, NCV8664CST33T3G at 29 µA) reduces idle power dissipation. Higher quiescent current (SPX2945M3-L-3-3/TR at 300 µA) increases standby power draw.

Q: Are there temperature range limitations with substitute parts?

A: The original part operates -40°C to 150°C. SPX2945M3-L-3-3/TR is limited to -40°C to 85°C, and SPX2954M3-L-3-3/TR and SPX3940AM3-L-3-3/TR are limited to -40°C to 125°C. These restrictions may exclude use in high-temperature automotive or industrial environments.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message