TLE42344GHTMA1 Equivalent & Substitute Parts

Part Overview

The TLE42344GHTMA1 is a linear voltage regulator IC from Infineon Technologies designed for positive fixed 5V output at 100mA in a surface-mount SOT223-4 package. This automotive-grade component features integrated protection against overcurrent, overtemperature, and reverse polarity conditions, with an enable control feature for power management applications.

The TLE42344GHTMA1 carries a Last Time Buy product status, indicating that this part number is no longer in active production. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently utilizing this regulator.

Substiute Parts

TLE42344GHTMA1

Infineon TechnologiesIn Stock: 1635TLE42344GHTMA1 Datasheet

Current PartRFQ

TLE42644GHTMA1

Infineon TechnologiesIn Stock: 4368TLE42644GHTMA1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLE42344GHTMA1 is determined by strict equivalence across the following critical parameters:

Output Specifications: Output voltage (5V fixed), output current (100mA), and output configuration (positive) must remain identical across all substitute parts.

Package Compatibility: The PG-SOT223-4 surface-mount package must be maintained to ensure mechanical and electrical compatibility with existing PCB layouts.

Electrical Performance: Input voltage rating, voltage dropout characteristics, and operating temperature range must support the original application requirements.

Automotive Compliance: All substitute parts must maintain automotive-grade classification and AEC-Q100 qualification to preserve design integrity in regulated applications.

Protection Features: Overcurrent, overtemperature, and reverse polarity protection must be present in substitute parts to maintain system safety.

The TLE42644GHTMA1 from Infineon Technologies qualifies as a direct substitute based on these criteria, with enhanced performance characteristics in specific areas while maintaining full functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: The TLE42644GHTMA1 is the manufacturer-recommended substitute for the TLE42344GHTMA1. Both parts maintain identical output specifications, package configuration, and automotive-grade qualification.

Product Status Consideration: The TLE42344GHTMA1 is designated Last Time Buy, while the TLE42644GHTMA1 maintains Active product status. This status difference ensures long-term availability and supply chain continuity when transitioning to the substitute part.

Compliance Alignment: Both parts are ROHS3 compliant, REACH unaffected, and carry AEC-Q100 automotive qualification. Substitution does not compromise regulatory or compliance requirements.

Performance Enhancement: The TLE42644GHTMA1 provides improved quiescent current performance (70 µA versus 400 µA) and enhanced PSRR (68 dB versus 54 dB at 100Hz), resulting in lower power consumption and superior noise rejection. The substitute also includes short-circuit protection in addition to the overcurrent, overtemperature, and reverse polarity protection present in the original part.

Input Voltage Consideration: The TLE42644GHTMA1 specifies a maximum input voltage of 40V compared to 45V for the TLE42344GHTMA1. Applications operating above 40V input require verification that the substitute part remains suitable for the intended voltage range.

Frequently Asked Questions (FAQ)

Q: Can the TLE42644GHTMA1 directly replace the TLE42344GHTMA1 in existing designs?

A: Yes, the TLE42644GHTMA1 is a direct substitute provided that the application input voltage does not exceed 40V. Both parts share identical output voltage (5V), output current (100mA), package type (PG-SOT223-4), and automotive qualification (AEC-Q100). Pin configuration and functional operation are equivalent.

Q: What is the significance of the Last Time Buy status for the TLE42344GHTMA1?

A: Last Time Buy status indicates that Infineon Technologies has discontinued production of the TLE42344GHTMA1 and will not accept new orders beyond a specified cutoff date. Existing inventory will be depleted, making substitution necessary for long-term product support and future production runs.

Q: Are there differences in protection features between these parts?

A: The TLE42344GHTMA1 includes overcurrent, overtemperature, and reverse polarity protection. The TLE42644GHTMA1 includes all three protections plus additional short-circuit protection. Both configurations meet automotive safety requirements; the substitute offers enhanced protection coverage.

Q: How do the quiescent current specifications affect application design?

A: The TLE42644GHTMA1 quiescent current of 70 µA is significantly lower than the TLE42344GHTMA1 at 400 µA. In battery-powered or low-power standby applications, this 330 µA reduction directly decreases idle power consumption. Applications with strict power budgets benefit from this improvement.

Q: What is the maximum input voltage limitation for the TLE42644GHTMA1?

A: The TLE42644GHTMA1 specifies a maximum input voltage of 40V. If the original design operates with input voltages between 40V and 45V, the substitute part is not suitable without circuit redesign. Verify the actual input voltage range in the application before substitution.

Q: Are both parts suitable for automotive applications?

A: Yes, both the TLE42344GHTMA1 and TLE42644GHTMA1 carry automotive-grade classification and AEC-Q100 qualification. Both parts meet automotive reliability, temperature cycling, and quality standards. Substitution does not compromise automotive application requirements.

Q: Is the package footprint identical between these parts?

A: Yes, both parts use the PG-SOT223-4 package type, which corresponds to the TO-261-4 and TO-261AA case designations. PCB layout, footprint, and land pattern remain unchanged during substitution.

Q: What is the PSRR improvement significance in the TLE42644GHTMA1?

A: The TLE42644GHTMA1 provides 68 dB PSRR at 100Hz compared to 54 dB for the TLE42344GHTMA1. This 14 dB improvement represents approximately 5 times better power supply noise rejection, resulting in cleaner regulated output voltage and reduced noise coupling to sensitive circuits.