TLE4274GV85ATMA2 Equivalent & Substitute Parts

Part Overview

The TLE4274GV85ATMA2 is a linear voltage regulator IC from Infineon Technologies' OPTIREG™ series, designed to deliver a fixed 8.5V output at 400mA with integrated protection features including over-current, over-temperature, reverse polarity, and short-circuit protection. This device is qualified to AEC-Q100 automotive standards and operates across an extended temperature range of -40°C to 150°C.

The TLE4274GV85ATMA2 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for applications currently utilizing this regulator.

Substiute Parts

TLE4274GV85ATMA2

Infineon TechnologiesIn Stock: 896TLE4274GV85ATMA2 Datasheet

Current PartRFQ

LM2937ESX-8.0/NOPB

National SemiconductorIn Stock: 5632LM2937ESX-8.0/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLE4274GV85ATMA2 is determined by the following critical parameters:

• Output Voltage Compatibility: The substitute must provide a fixed output voltage within the acceptable range for the application. The TLE4274GV85ATMA2 delivers 8.5V; substitutes must deliver equivalent or compatible fixed output voltage.
• Output Current Capacity: The substitute must meet or exceed the 400mA output current requirement.
• Package Compatibility: The substitute must use the same or compatible package footprint (TO-263-4, D2PAK with 3 leads plus tab).
• Input Voltage Range: The substitute must accept the maximum input voltage of 40V or higher.
• Voltage Dropout Performance: The substitute should maintain acceptable dropout voltage characteristics for the application's operating conditions.
• Operating Temperature Range: The substitute must support the required temperature range; the TLE4274GV85ATMA2 operates from -40°C to 150°C.
• Protection Features: The substitute should include equivalent protection mechanisms (over-current, over-temperature, short-circuit protection).

The LM2937ESX-8.0/NOPB meets these substitution criteria with compatible electrical characteristics and package form factor.

Parameter Comparison

Engineering Selection Recommendations

The LM2937ESX-8.0/NOPB is an active product from National Semiconductor and represents a viable substitute for the obsolete TLE4274GV85ATMA2. Both devices share identical package geometry (TO-263-4, D2PAK with 3 leads plus tab), enabling direct footprint compatibility.

Key considerations for selection:

• Output Voltage: The LM2937ESX-8.0/NOPB provides 8V output versus the TLE4274GV85ATMA2's 8.5V. Applications requiring precisely 8.5V must evaluate whether 8V operation is acceptable within system design margins.
• Output Current: The LM2937ESX-8.0/NOPB exceeds the current requirement at 500mA versus 400mA, providing additional headroom.
• Input Voltage Range: The LM2937ESX-8.0/NOPB accepts maximum input of 26V compared to 40V for the TLE4274GV85ATMA2. Applications with input voltages exceeding 26V cannot use this substitute.
• Operating Temperature: The LM2937ESX-8.0/NOPB operates to 125°C maximum versus 150°C for the TLE4274GV85ATMA2. Applications requiring operation above 125°C require alternative solutions.
• Product Availability: The LM2937ESX-8.0/NOPB is in active production with 5616 units in stock, ensuring supply continuity.

Frequently Asked Questions (FAQ)

Q: Can the LM2937ESX-8.0/NOPB directly replace the TLE4274GV85ATMA2 in existing designs?

A: Direct replacement is possible only if the application tolerates the output voltage difference (8V versus 8.5V), input voltage does not exceed 26V, and maximum operating temperature does not exceed 125°C. Verify these parameters against your system requirements before substitution.

Q: What is the significance of the output voltage difference between 8.5V and 8V?

A: The 0.5V difference represents a 5.9% reduction in output voltage. Applications with tight voltage regulation requirements or dependent on the full 8.5V specification must evaluate whether 8V operation remains within acceptable system tolerances.

Q: Are the package footprints identical between these two devices?

A: Yes. Both the TLE4274GV85ATMA2 and LM2937ESX-8.0/NOPB use the TO-263-4 package (D2PAK with 3 leads plus tab), enabling direct PCB footprint compatibility without layout modifications.

Q: What is the impact of the higher quiescent current in the LM2937ESX-8.0/NOPB?

A: The LM2937ESX-8.0/NOPB draws 10 mA quiescent current versus 220 µA for the TLE4274GV85ATMA2. This 45-fold increase may impact power consumption in battery-powered or low-power applications where quiescent current is a critical design parameter.

Q: Can the LM2937ESX-8.0/NOPB be used in applications requiring 40V input?

A: No. The LM2937ESX-8.0/NOPB is rated for maximum 26V input. Applications requiring 40V input capability must identify alternative substitutes or continue using the original TLE4274GV85ATMA2 if available through alternative supply channels.

Q: What protection features does the LM2937ESX-8.0/NOPB provide?

A: The LM2937ESX-8.0/NOPB includes mirror-image insertion protection, over-temperature protection, short-circuit protection, and transient voltage protection. The TLE4274GV85ATMA2 provides over-current, over-temperature, reverse polarity, and short-circuit protection. Both devices offer comprehensive protection, though the specific mechanisms differ.