Infineon Technologies TLE7274DNTMA1

Overview

TLE7274DNTMA1 from Infineon Technologies is a monolithic 5-V low-dropout linear voltage regulator designed for automotive load-switch and ECU power-supply applications. It delivers up to 300 mA output current with ±2% output voltage accuracy (4.9–5.1 V), ultra-low quiescent current (20 µA typ.), and operates across 5.5–42 V input range. Its integrated reverse-current sink protects downstream circuitry during battery reversal or load-dump transients.

For engineers reviewing the TLE7274DNTMA1 datasheet, TLE7274DNTMA1 pinout, TLE7274DNTMA1 application, or TLE7274DNTMA1 equivalent, key selection criteria include dropout voltage at 200 mA (250–500 mV), thermal resistance (8 K/W junction-to-case), ceramic capacitor stability (≥470 nF), short-circuit and overtemperature protection, and suitability for always-on V_BAT-connected systems.

Technical Context

The TLE7274DNTMA1 employs a charge-pump-assisted bandgap reference architecture to achieve ultra-low quiescent current while maintaining regulation down to 5.5 V input. Its internal overtemperature shutdown and short-circuit current limiting (320 mA min., 800 mA max. at V_Q = 0 V) enable robust operation in automotive under-hood environments.

Stability is ensured with ceramic output capacitors ≥470 nF (ESR < 3 Ω), eliminating need for large electrolytics. The integrated output sink limits reverse voltage at Q to ≤5.5 V, preventing overvoltage damage during transient reverse-current events such as battery jump-starts.

Key Specifications

Pinout & Package

P-TO252-3-1 (D-PAK) package with exposed tab thermally and electrically connected to Pin 2 (GND). Mounting requires direct thermal contact to PCB copper pour for effective heat dissipation.

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 TLE7274DNTMA1 uniquely combines 42 V input tolerance, integrated reverse-current sink, and automotive-grade thermal protection-making it irreplaceable for primary V_BAT-connected 5 V rails in harsh environments.

Availability

TLE7274DNTMA1 is available at Aetrix Electronics and suitable for Body Control Modules, Engine Control Units, and Telematics Control Units requiring stable component supply across automotive production lifecycles.

Supply support for TLE7274DNTMA1 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 electronics, and industrial control ICs.

The TLE7274 belongs to Infineon's TLE7x automotive LDO family, engineered specifically for always-on, high-reliability power rails in engine compartments and chassis electronics.

FAQ

What is the minimum input voltage required for regulation at full 300 mA load?

The TLE7274DNTMA1 maintains regulation down to 5.5 V input across its operating temperature range. At 300 mA output, the dropout voltage is ≤500 mV, meaning the input must remain ≥5.5 V to sustain 5.0 V output. This enables reliable operation during automotive cold-cranking events where battery voltage dips below 6 V.

Can the device operate with a 220 nF ceramic output capacitor?

No. The datasheet specifies a minimum output capacitance of 470 nF with ESR < 3 Ω for guaranteed loop stability. Using 220 nF risks oscillation or poor transient response, especially under dynamic load changes. Stability testing with smaller values is not validated and violates the design requirements stated in Data Sheet Rev. 1.1.

Is the exposed tab electrically isolated from the GND pin?

No. Pin 2 (GND) is internally bonded to the exposed metal tab. The tab must be soldered to a PCB ground plane for both electrical grounding and thermal conduction. Isolating the tab breaks the ground path and impairs thermal performance, risking thermal shutdown or premature failure.

Does the TLE7274DNTMA1 support adjustable output voltage via external resistors?

No. The TLE7274DNTMA1 is a fixed 5.0 V output regulator with internal bandgap reference and feedback network. It does not provide an ADJ pin or external resistor divider option. For adjustable output, consider Infineon's TLE7272 series or alternate families like TPS7B87xx.