Infineon Technologies TLE4274DV33ATMA1

Overview

TLE4274DV33ATMA1 from Infineon Technologies is a 3.3 V ±4% fixed-output linear voltage regulator in PG-TO252-3-11 (D-PAK) package, delivering up to 400 mA output current with input voltage range 4.7–40 V. It features short-circuit and reverse-polarity protection, thermal shutdown, and AEC-Q100 qualification for automotive power supply rails.

For engineers reviewing the TLE4274DV33ATMA1 datasheet, TLE4274DV33ATMA1 pinout, TLE4274DV33ATMA1 application, or TLE4274DV33ATMA1 equivalent, key selection criteria include dropout voltage (0.7–1.2 V at 300 mA), quiescent current (8–30 µA to 30 mA depending on load), ESR-stable output capacitance (≥10 µF, ≤2.5 Ω), junction temperature range (−40 to +150 °C), and RoHS-compliant green packaging.

Technical Context

The TLE4274DV33ATMA1 uses a bandgap reference and control amplifier to regulate output voltage by driving a series pass transistor, with saturation control preventing oversaturation under high load. Its internal protection circuits actively monitor temperature, current, and polarity to trigger shutdown before damage occurs.

Designed for automotive environments, it operates across −40 to +150 °C junction temperature, supports input transients up to ±42 V, and maintains regulation stability with output capacitors ≥10 µF and ESR ≤2.5 Ω - verified over full temperature and load range per Rev. 2.3 datasheet.

Key Specifications

Pinout & Package

PG-TO252-3-11 (D-PAK) package with exposed thermal pad soldered to PCB copper for enhanced heat dissipation; pin 2 and 4 are internally connected to heatsink and ground.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output automotive LDO applications.

Compared with TLV73333PDBVR and NCV8664CDT33RKG, the TLE4274DV33ATMA1 uniquely combines reverse polarity immunity, 400 mA capability, and 4 K/W junction-to-case thermal resistance - making it optimal for space-constrained, high-reliability automotive power nodes where input fault robustness is non-negotiable.

Availability

TLE4274DV33ATMA1 is available at Aetrix Electronics and suitable for automotive body electronics, engine management systems, and ADAS camera modules requiring stable component supply with AEC-Q100 compliance, RoHS certification, and long-term production continuity.

Supply support for TLE4274DV33ATMA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and industrial control solutions, with global manufacturing and quality certifications including IATF 16949.

The TLE4274 series belongs to Infineon's automotive linear regulator product line, engineered specifically for robust, fault-tolerant power supply in harsh vehicle environments - emphasizing reverse polarity resilience, thermal survivability, and AEC-Q100 validation.

FAQ

What is the maximum allowable input voltage for continuous operation?

The TLE4274DV33ATMA1 supports continuous input voltages from 4.7 V to 40 V. Absolute maximum rating is 45 V for brief transients, but sustained operation above 40 V risks thermal overload due to increased power dissipation in the pass transistor. Input voltage must remain within 4.7–40 V under all operating conditions including cold-crank and load-dump events.

Can this regulator be used without an output capacitor?

No. An output capacitor ≥10 µF with ESR ≤2.5 Ω is mandatory for loop stability across −40 to +150 °C. Omitting it causes oscillation and unregulated output. Ceramic or low-ESR tantalum capacitors meet this requirement; aluminum electrolytics require careful ESR verification per datasheet Figure 4.

Is the PG-TO252-3-11 package thermally enhanced compared to SOT223?

Yes. The PG-TO252-3-11 (D-PAK) package has R_thJC = 4 K/W versus 25 K/W for SOT223, enabling significantly higher power dissipation. When soldered to ≥1 cm² copper, its R_thJA is 70 K/W - 30% lower than SOT223's 100 K/W - making it preferred for 400 mA continuous loads in confined automotive layouts.

Does the device support enable/shutdown control?

No. The TLE4274DV33ATMA1 has no dedicated enable pin or shutdown mode. It operates continuously when input voltage exceeds 4.7 V. For controlled power sequencing, external MOSFET switching on the input rail is required - as shown in Figure 5 of the datasheet using an INH-controlled FET stage.