Infineon Technologies TLE4275GATMA1

Overview

TLE4275GATMA1 from Infineon Technologies is a monolithic 5-V low-drop fixed linear voltage regulator in PG-TO263-5-1 package, delivering up to 450 mA output current with ±2% output voltage accuracy (4.9–5.1 V), 250–500 mV dropout at 300 mA, and integrated power-on/undervoltage reset with programmable delay. It is AEC-Q100 qualified and designed for automotive body control modules requiring robust thermal protection and reverse-polarity immunity.

For engineers reviewing the TLE4275GATMA1 datasheet, TLE4275GATMA1 pinout, TLE4275GATMA1 application, or TLE4275GATMA1 equivalent, key selection criteria include its 45 V max input rating, reset threshold of 4.65 V (typ.), 16 ms typical delay with 47 nF capacitor, junction-to-case thermal resistance of 4 K/W, and RoHS-compliant green packaging.

Technical Context

The TLE4275GATMA1 employs a bandgap-referenced control amplifier driving a series pass transistor with saturation control to prevent oversaturation under load. Its internal protection circuits include thermal shutdown (150 °C trip), short-circuit limiting, reverse-polarity blocking, and ESD immunity >4 kV.

Reset generation is triggered when VQ falls below 4.65 V (typ.) and remains asserted until VQ rises above 4.8 V (max); delay time is set externally via capacitor on Pin 4 (D), with 47 nF yielding 10–22 ms typical delay. The open-collector RO output sinks up to 5 mA and operates down to VQ = 1 V.

Key Specifications

Pinout & Package

PG-TO263-5-1 package: surface-mount, thermally enhanced, with Pin 3 internally connected to heatsink tab for direct PCB thermal coupling.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 5 V automotive LDO regulator applications.

Compared with TLV73350PDBVR and TPS7B6950QDCYRQ1, the TLE4275GATMA1 offers superior thermal performance (4 K/W vs. >10 K/W), faster reset reaction (<2 µs), and automotive-grade reset programmability-making it optimal for cost-sensitive, thermally demanding BCM and sensor nodes.

Availability

TLE4275GATMA1 is available at Aetrix Electronics and suitable for automotive body control modules, instrument cluster power supplies, and engine management sensor interfaces requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.

Supply support for TLE4275GATMA1 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 qualification infrastructure.

The TLE4275 product line delivers AEC-Q100-qualified linear regulators optimized for automotive subsystems requiring high reliability, wide input range, and integrated protection-targeting body electronics, chassis, and powertrain domains.

FAQ

What is the minimum input voltage required for regulation?

The TLE4275GATMA1 requires a minimum input voltage of 5.5 V to maintain 5 V output regulation, as specified in its operating range. Below this, the output drops linearly with input due to insufficient headroom for the internal pass transistor's saturation control.

Can the reset delay be disabled or shortened below 10 ms?

No-reset delay is programmable only by external capacitor on Pin 4 (D), with minimum practical delay ~10 ms (using ≤22 nF). Removing the capacitor disables reset timing entirely, causing immediate assertion of RO upon power-up or undervoltage event.

Is an external output capacitor mandatory, and what type is recommended?

Yes-an output capacitor ≥22 µF with ESR ≤5 Ω at 10 kHz is mandatory for loop stability. Aluminum polymer or low-ESR tantalum capacitors are recommended; ceramic alone is insufficient due to excessively low ESR causing phase margin loss.

Does the GND pin (Pin 3) require a dedicated PCB copper pour?

Yes-Pin 3 is internally bonded to the exposed metal heatsink tab. A large, low-thermal-resistance copper pour (≥300 mm²) connected directly to Pin 3 is required to achieve the rated 4 K/W junction-to-case thermal resistance and prevent thermal shutdown at full load.