Infineon Technologies TLE4276GVATMA2

Overview

TLE4276GVATMA2 from Infineon is a fixed-output (5.0 V), AEC-Q100 qualified low-dropout linear voltage regulator in PG-TO263-5 package, delivering up to 400 mA output current with ±4% output voltage tolerance, 250–500 mV dropout at 250 mA, and inhibit-controlled shutdown (<10 µA quiescent current). It is designed for automotive power supply rails feeding microcontrollers, sensors, and CAN transceivers.

For engineers reviewing the TLE4276GVATMA2 datasheet, TLE4276GVATMA2 pinout, TLE4276GVATMA2 application, or TLE4276GVATMA2 equivalent, key selection criteria include its automotive qualification, thermal robustness (Tj = −40 °C to +150 °C), reverse-polarity protection, short-circuit immunity, and compatibility with low-ESR ceramic output capacitors (≥22 µF, ≤3 Ω).

Technical Context

The TLE4276GVATMA2 integrates a bandgap reference, control amplifier, saturation-controlled NPN series pass transistor, and comprehensive protection circuitry-including overtemperature shutdown, reverse-polarity blocking, and short-circuit current limiting. Its inhibit input (INH) is active-low and enables system-level power sequencing.

It operates across an input range of 5.5 V to 40 V (minimum VI = VQ + 0.5 V), maintains regulation under load currents from 5 mA to 400 mA, and achieves 54 dB PSRR at 100 Hz. Thermal resistance is 80 K/W (junction-to-ambient, mounted on 80 × 80 × 1.5 mm PCB).

Key Specifications

Pinout & Package

PG-TO263-5 (D²PAK) package with exposed thermal pad connected to GND; requires minimum 200 mm² copper pour for thermal performance. Pin 1 (I) is input, Pin 2 (INH) is active-low inhibit, Pin 3 (GND) is ground, Pin 4 (N.C.) is no-connect, Pin 5 (Q) is regulated output.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73350PDBVR and NCP1117ST50T3G, the TLE4276GVATMA2 uniquely combines AEC-Q100 qualification, integrated inhibit control, reverse-polarity immunity, and guaranteed 400 mA delivery at ≤500 mV dropout - making it the only drop-in solution for ASIL-B compliant power rails requiring functional safety support.

Availability

TLE4276GVATMA2 is available at Aetrix Electronics and suitable for Engine Control Units, Body Control Modules, ADAS camera ECUs, and Electric Power Steering systems requiring stable component supply across extended temperature and automotive lifecycle requirements.

Supply support for TLE4276GVATMA2 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 security solutions, with global manufacturing and automotive certification infrastructure.

The TLE4276 belongs to Infineon's TLE automotive linear regulator family, engineered specifically for robust, fault-tolerant power delivery in engine, chassis, and safety-critical electronic control units.

FAQ

What is the maximum allowable input voltage for continuous operation?

The TLE4276GVATMA2 supports continuous operation up to 40 V input. Absolute maximum rating is 45 V, but sustained operation above 40 V risks thermal overstress and violates AEC-Q100 stress conditions. Load dump transients must be clamped externally using a TVS diode rated for ISO 7637-2 Pulse 5a.

Can the output capacitor be reduced below 22 µF?

No - the datasheet specifies C_Q ≥ 22 µF with ESR ≤ 3 Ω at 10 kHz for guaranteed stability across temperature and load. Using smaller capacitance or higher ESR may cause oscillation, overshoot, or loss of regulation during load transients, especially above 100 mA step changes.

Is the N.C. pin (Pin 4) required to be grounded or left floating?

Pin 4 is internally unconnected and must remain unconnected - neither grounded nor tied to any potential. Connecting it to GND or another node has no functional benefit and may introduce parasitic coupling or violate layout guidelines in the Infineon application note AN2017-05.

Does the inhibit function disable internal protection circuits?

No - all protection features (overtemperature shutdown, short-circuit current limiting, reverse-polarity blocking) remain fully active even when INH = low. The inhibit input only disables the pass transistor and reduces quiescent current; fault detection and response are preserved to ensure safe fail-safe behavior.