Infineon Technologies TLE4270GNTMA1

Overview

TLE4270GNTMA1 from Infineon Technologies is a 5-V fixed-output, low-dropout linear voltage regulator with integrated reset generator, reverse polarity protection, overvoltage (≤65 V/400 ms), overtemperature, and short-circuit protection. It delivers up to 650 mA output current with ±2% output voltage tolerance (4.90–5.10 V) across -40 °C to +150 °C junction temperature, and supports automotive power rail conditioning in engine control units and body electronics.

For engineers reviewing the TLE4270GNTMA1 datasheet, TLE4270GNTMA1 pinout, TLE4270GNTMA1 application, or TLE4270GNTMA1 equivalent, key selection criteria include its 350–700 mV dropout at 550 mA, adjustable reset delay via external capacitor, 30 kΩ internal pull-up on RO, 42 V continuous input rating, and TO-263-5-1 (D²PAK) thermally enhanced package for high-reliability under-hood use.

Technical Context

This regulator uses a bandgap-referenced control amplifier driving a series pass transistor with saturation control to maintain regulation across wide load and input variations. Its reset generator monitors V_Q against a 4.5–4.8 V threshold and provides an open-collector RO signal with 30 kΩ internal pull-up to V_Q, configurable delay via capacitor on D pin.

Protection circuitry includes thermal shutdown at ~150 °C, reverse-polarity blocking, overvoltage turn-off at 42–46 V (with hysteresis), and current limiting that clamps output at ≥650 mA. Input range spans 6–42 V, supporting 12 V and 24 V automotive systems with transient immunity up to 65 V for ≤400 ms.

Key Specifications

Pinout & Package

Package: PG-TO263-5-1 (D²PAK), thermally optimized with exposed drain pad for PCB heatsinking; R_thj-c = 3 K/W, R_thj-a = 65 K/W on 80×80 mm² 35 µm Cu PCB.

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, TLE4270GNTMA1 uniquely combines 650 mA drive, full ISO 7637-2 transient immunity, reverse polarity blocking, and adjustable reset-making it the only choice for high-current, under-hood power domains requiring functional safety compliance.

Availability

TLE4270GNTMA1 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS sensor hubs, and infotainment head units requiring stable component supply across automotive production lifecycles.

Supply support for TLE4270GNTMA1 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 qualification aligned to IATF 16949.

The TLE4270 belongs to Infineon's TLE family of automotive-grade linear regulators, designed specifically for robust, high-temperature power conditioning in engine compartments and chassis electronics.

FAQ

What is the minimum input voltage required for regulation at full 650 mA load?

The minimum input voltage is 5.7 V, calculated as V_Q + V_DR(max) = 5.0 V + 0.7 V. At 550 mA, typical dropout is 350 mV, allowing regulation down to 5.35 V. Below this, output drops out of specification; design margin should include cold-crank derating.

How is the reset delay time calculated using the external capacitor on pin D?

Delay time t_rd ≈ 0.13 × C_D (in ms with C_D in nF). For example, a 100 nF capacitor yields ~13 ms typical delay. The relationship is linear and validated across -40 °C to +125 °C; capacitor tolerance directly impacts timing accuracy.

Can TLE4270GNTMA1 be used without the external capacitor on pin D?

Yes, but RO will assert immediately upon power-up without delay-causing premature reset release. Leaving D unconnected disables adjustable timing; for guaranteed power-on reset, a minimum 1 nF capacitor is recommended to filter noise and ensure reliable assertion.

Is the GND pin electrically isolated from the heatsink tab in the TO-263-5-1 package?

No-the GND pin is internally bonded to the exposed drain pad (heatsink tab), making them electrically common. PCB copper pour under the tab must be connected to system ground to ensure thermal performance and electrical safety; isolation would compromise R_thj-c = 3 K/W spec.