TLE4278GXUMA2 Equivalent & Substitute Parts

Part Overview

The TLE4278GXUMA2 is a linear voltage regulator IC from Infineon Technologies' OPTIREG™ series, delivering a fixed 5V output at 200mA with integrated reset and watchdog control features. Designed for automotive applications with AEC-Q100 qualification, this device provides comprehensive protection including over-current, over-temperature, reverse polarity, and short-circuit safeguards.

The TLE4278GXUMA2 is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently utilizing this regulator.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	5V
Output Current	200mA
Input Voltage (Max)	45V
Voltage Dropout (Max)	0.5V @ 150mA
Quiescent Current	200 µA
Operating Temperature Range	-40°C ~ 150°C
Package	14-SOIC (0.154", 3.90mm Width)
Grade	Automotive
Qualification	AEC-Q100
Control Features	Reset, Watchdog
Protection Features	Over Current, Over Temperature, Reverse Polarity, Short Circuit

Substitute Part Grouping Explanation

Substitution eligibility for the TLE4278GXUMA2 is determined by the following critical parameters:

Fixed output voltage of 5V
Output current capability of 200mA
Maximum input voltage of 40V or higher
Automotive grade qualification (AEC-Q100)
14-SOIC package compatibility
Operating temperature range of -40°C to 150°C or wider
Presence of reset and watchdog control features
Protection against over-current, over-temperature, and reverse polarity

Three parts meet these substitution criteria: TLE4278GXUMA3 (parametric equivalent from Infineon), TLE4678GMXUMA2 (parametric equivalent with enhanced performance), and NCV4263-2CD250R2G (manufacturer-recommended alternative from onsemi).

Parameter Comparison

Parameter	TLE4278GXUMA2	TLE4278GXUMA3	TLE4678GMXUMA2	NCV4263-2CD250R2G
Manufacturer	Infineon	Infineon	Infineon	onsemi
Output Voltage	5V	5V	5V	5V
Output Current	200mA	200mA	200mA	200mA
Input Voltage (Max)	45V	45V	45V	40V
Voltage Dropout (Max)	0.5V @ 150mA	0.5V @ 150mA	0.35V @ 150mA	0.5V @ 150mA
Quiescent Current	200 µA	200 µA	80 µA	1.3 mA
Operating Temperature	-40°C ~ 150°C	-40°C ~ 150°C	-40°C ~ 150°C	-40°C ~ 150°C
Package	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Grade	Automotive	Automotive	Automotive	Automotive
AEC-Q100	Yes	Yes	Yes	Yes
Product Status	Obsolete	Active	Last Time Buy	Active
RoHS Compliance	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For applications currently using the TLE4278GXUMA2, the following selection guidance applies:

TLE4278GXUMA3 is the direct parametric equivalent with identical electrical specifications. This part maintains full compatibility with existing designs and carries active product status, ensuring long-term availability. It is the preferred choice for direct replacement in new production runs and redesigns requiring minimal validation effort.

TLE4678GMXUMA2 offers enhanced performance characteristics, including lower voltage dropout (0.35V vs. 0.5V) and reduced quiescent current (80 µA vs. 200 µA), resulting in improved power efficiency. However, this part carries Last Time Buy status, limiting its suitability for new long-term designs. It is suitable for applications where performance optimization justifies the supply chain consideration.

NCV4263-2CD250R2G is the manufacturer-recommended alternative from onsemi, providing active product status and robust availability (20,300 pcs in stock). This part maintains all critical automotive qualifications and protection features. The maximum input voltage is reduced to 40V, which is acceptable for most automotive applications but must be verified against specific circuit requirements. Higher quiescent current (1.3 mA) and supply current (23 mA) may impact power budget calculations in low-power designs.

Frequently Asked Questions (FAQ)

Q: Can TLE4278GXUMA3 be used as a direct drop-in replacement for TLE4278GXUMA2?

A: Yes. TLE4278GXUMA3 is a parametric equivalent with identical output voltage, output current, voltage dropout, quiescent current, operating temperature range, package, and control/protection features. No circuit modifications are required.

Q: What is the primary advantage of TLE4678GMXUMA2 over the original part?

A: TLE4678GMXUMA2 provides lower voltage dropout (0.35V vs. 0.5V) and significantly reduced quiescent current (80 µA vs. 200 µA), improving overall power efficiency. However, verify Last Time Buy status implications for your supply chain strategy.

Q: Is NCV4263-2CD250R2G suitable for designs with input voltages above 40V?

A: No. NCV4263-2CD250R2G has a maximum input voltage rating of 40V, compared to 45V for the TLE4278GXUMA2. Applications requiring the full 45V input range must use TLE4278GXUMA3 or TLE4678GMXUMA2.

Q: Are all substitute parts automotive-qualified?

A: Yes. All three substitute parts carry AEC-Q100 qualification and automotive-grade designation, meeting the same qualification standards as the original TLE4278GXUMA2.

Q: What is the impact of higher quiescent current in NCV4263-2CD250R2G?

A: The NCV4263-2CD250R2G draws 1.3 mA quiescent current compared to 200 µA in the TLE4278GXUMA2. In applications with strict power budget constraints or extended idle periods, this difference may be significant and should be evaluated against system requirements.

Q: Are all parts available in the same package?

A: Yes. All substitute parts use the 14-SOIC (0.154", 3.90mm Width) package, ensuring mechanical and electrical compatibility without PCB redesign.

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