Infineon Technologies TLE4274GSV25HTSA1

Overview

TLE4274GSV25HTSA1 from Infineon Technologies is a fixed-output linear voltage regulator delivering 2.5 V ±4% at up to 400 mA, designed for automotive power supply rails. It operates from 4.7 V to 40 V input, features short-circuit and reverse-polarity protection, and is AEC-Q100 qualified for under-hood applications including engine control units and body electronics.

For engineers reviewing the TLE4274GSV25HTSA1 datasheet, TLE4274GSV25HTSA1 pinout, TLE4274GSV25HTSA1 application, or TLE4274GSV25HTSA1 equivalent, key selection criteria include its 2.5 V output tolerance, 1.0–2.0 V dropout at 300 mA, 8–30 mA quiescent current across load, thermal shutdown behavior, and SOT223-4 package thermal resistance (R_thJC = 25 K/W).

Technical Context

The TLE4274GSV25HTSA1 uses a bandgap-referenced control amplifier driving a series pass transistor with saturation control to prevent oversaturation under high load. Its internal protection circuits actively monitor temperature, output current, and polarity to disable the output during fault conditions.

Stability requires an output capacitor ≥10 µF with ESR ≤2.5 Ω and an input capacitor damped by a ~1 Ω series resistor. The IC maintains regulation over junction temperatures from –40 °C to +150 °C and supports input transients up to ±42 V.

Key Specifications

Pinout & Package

PG-SOT223-4 package with exposed thermal pad (pin 4) soldered to PCB copper for thermal conduction. Pin 2 and pin 4 are internally connected to GND and heatsink.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73325PDBVR and REG1117-2.5, the TLE4274GSV25HTSA1 uniquely combines AEC-Q100 qualification, reverse-polarity survival, and 400 mA output in a thermally optimized SOT223-4 package-making it the only drop-in solution for safety-critical 2.5 V rails where fault coverage and temperature robustness are mandatory.

Availability

TLE4274GSV25HTSA1 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera systems, and electric power steering applications requiring stable component supply under automotive qualification and long-term lifecycle assurance.

Supply support for TLE4274GSV25HTSA1 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, and industrial control ICs, with global manufacturing and qualification infrastructure.

The TLE4274 family targets automotive power supply systems requiring high reliability, fault tolerance, and extended temperature operation-designed specifically for ECU, BCM, and ADAS subsystems demanding AEC-Q100 compliance.

FAQ

What is the maximum allowable input voltage for continuous operation?

The TLE4274GSV25HTSA1 supports continuous operation up to 40 V input. Absolute maximum rating is 45 V, but sustained operation above 40 V risks thermal overload or accelerated degradation. Input transients up to ±42 V are survivable per AEC-Q100 stress testing, provided duration is limited and energy is clamped externally.

Does this regulator require an external shutdown signal?

No. The TLE4274GSV25HTSA1 has no enable/shutdown pin and operates continuously when valid input voltage is applied. It incorporates autonomous thermal shutdown and current limiting-no external control signal is needed or supported for basic regulation function.

Can the SOT223-4 package be used without thermal copper pour?

No. The PG-SOT223-4 package requires pin 4 (GND/thermal pad) to be soldered to ≥1 cm² of copper on FR4 to achieve R_thJA = 100 K/W. Without this, junction temperature rises rapidly under 400 mA load, triggering thermal shutdown within seconds. Thermal design must follow Infineon's layout guidelines in Data Sheet Rev. 2.3.

Is the 2.5 V output version pin-compatible with the 3.3 V variant?

Yes. TLE4274GSV25HTSA1 and TLE4274GSV33HTSA1 share identical PG-SOT223-4 pinout, thermal pad configuration, and protection architecture. Only the internal voltage reference differs-allowing direct substitution where output voltage matches system requirements, without PCB redesign.