Infineon Technologies TLE4254EJAXUMA1

Overview

TLE4254EJAXUMA1 from Infineon Technologies is a monolithic high-accuracy low-dropout voltage tracking regulator in PG-DSO-8 exposed pad package, designed for automotive off-board sensor supply under harsh conditions. It delivers 70 mA output current with ±1.5% output tracking tolerance to reference, 0.2 V typical dropout at full load, and operates across -40 °C to 150 °C junction temperature with input voltage range of -20 V to +45 V.

For engineers reviewing the TLE4254EJAXUMA1 datasheet, TLE4254EJAXUMA1 pinout, TLE4254EJAXUMA1 application, or TLE4254EJAXUMA1 equivalent, this device supports precise voltage tracking in powertrain sensor systems, offers adjustable output down to 2.0 V via EN/ADJ and FB pins, integrates short-circuit and overtemperature protection, and enables low-power shutdown mode with <10 µA OFF-state current.

Technical Context

The TLE4254EJAXUMA1 implements a precision tracking architecture where the output voltage (Q) follows an externally applied reference voltage at the EN/ADJ pin with high fidelity-typical tracking error ±1.5% over temperature and load. Its internal error amplifier compares the feedback signal (FB) against a 1.4 V internal reference, enabling both step-down and step-up tracking configurations via external resistor dividers.

It features integrated reverse-polarity protection on the input (I), short-circuit protection to GND and battery on Q, and thermal shutdown triggered above 150 °C junction temperature. The exposed-pad PG-DSO-8 package provides enhanced thermal performance (R_thJA = 47 K/W with heatsink), critical for sustained 70 mA operation in engine bay environments.

Key Specifications

Pinout & Package

Package: PG-DSO-8 exposed pad (RoHS-compliant, thermally enhanced). Exposed pad must be soldered to PCB ground plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive tracking regulator applications.

Compared with TLE4254GA, the EJAXUMA1 enables higher power density in under-hood applications via its exposed pad; compared with TLV71733PDRVR, it delivers integrated automotive-grade protection and tracking flexibility absent in general-purpose LDOs.

Availability

TLE4254EJAXUMA1 is available at Aetrix Electronics and suitable for engine control units, transmission control modules, body control modules, and ADAS camera systems requiring stable component supply across extended temperature and voltage stress conditions.

Supply support for TLE4254EJAXUMA1 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 OPTIREG™ linear product line delivers AEC-Q100-qualified voltage regulators optimized for automotive subsystems requiring high reliability, transient robustness, and precision tracking under extreme environmental conditions.

FAQ

What is the minimum reference voltage required at the EN/ADJ pin for regulation?

The EN/ADJ pin requires a minimum of 2.0 V to establish regulation, as specified in the functional range table. Below 2.0 V, the device remains in shutdown or undefined state; the internal error amplifier reference is 1.4 V, but stable tracking begins only when EN/ADJ ≥2.0 V per datasheet Section 3.2.

Can the TLE4254EJAXUMA1 regulate output voltages higher than the EN/ADJ reference voltage?

Yes - the FB pin enables output voltage scaling above the EN/ADJ reference using an external resistor divider. For example, with 5 V at EN/ADJ, a 1:1 divider on FB yields 10 V output; the device maintains ±1.5% tracking accuracy regardless of whether output is set above or below the reference.

Is the exposed pad electrically connected internally, and how must it be handled on the PCB?

The exposed pad is internally connected to GND and must be soldered to a dedicated PCB ground plane with thermal vias. It is not optional: omitting pad connection degrades thermal resistance from 47 K/W to >150 K/W and risks thermal shutdown under 70 mA load at elevated ambient temperatures.

Does the TLE4254EJAXUMA1 provide status indication like the GS/EJS versions?

No - the EJAXUMA1 corresponds to the EJA version, which lacks the ST (status) pin. It does not offer open-collector fault signaling. Fault detection is internal only (thermal shutdown, short-circuit latch-off), with no external status output; use EJS variant if system-level fault reporting is required.