Infineon Technologies TLE4254GAXUMA3

Overview

TLE4254GAXUMA3 from Infineon Technologies is a high-accuracy, low-dropout voltage tracking regulator in PG-DSO-8 package, designed for automotive 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. Used in powertrain management systems to track main regulator outputs (e.g., 5 V).

For engineers reviewing the TLE4254GAXUMA3 datasheet, TLE4254GAXUMA3 pinout, TLE4254GAXUMA3 application, or TLE4254GAXUMA3 equivalent, key selection criteria include adjustable output down to 2.0 V, 1 µF ceramic capacitor stability, reverse polarity protection, short-circuit status indication (not present in GA version), and AEC-Q100 qualification for automotive use.

Technical Context

The TLE4254GAXUMA3 implements a precision tracking architecture where the output voltage follows an external reference applied to the EN/ADJ pin with tight tolerance (±1.5% over temperature and line/load). Its internal error amplifier compares the feedback signal (FB pin) against a 1.4 V internal reference, enabling both step-down and step-up tracking via external resistor dividers.

It integrates robust protection: short-circuit to GND/battery, reverse polarity input (-20 V to +45 V operating range), overtemperature shutdown, and ultra-low OFF-mode current (<10 µA). The GA variant lacks status output but supports flexible FB-based output scaling - critical for multi-rail sensor subsystems requiring coordinated voltage rails.

Key Specifications

Pinout & Package

Package: PG-DSO-8 (standard exposed-pad variant not used in GA version; TLE4254GAXUMA3 uses non-exposed pad PG-DSO-8 per Infineon marking and ordering info).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV71718PDBVR and MAX1725EUT+T, the TLE4254GAXUMA3 uniquely combines adjustable tracking, 45 V input tolerance, reverse polarity hardening, and AEC-Q100 qualification - making it the sole fit for demanding powertrain sensor supply where supply rail coordination and fault resilience are mandatory.

Availability

TLE4254GAXUMA3 is available at Aetrix Electronics and suitable for engine control units, transmission control modules, and exhaust aftertreatment systems requiring stable component supply under automotive qualification and long-term lifecycle support.

Supply support for TLE4254GAXUMA3 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 AEC-Q100 validation infrastructure.

The TLE4254 belongs to Infineon's OPTIREG™ linear product line, engineered specifically for high-reliability automotive sensor supply - emphasizing tracking accuracy, wide input range, and integrated fault protection in compact packages.

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 enable regulation and establish the tracking reference. Below 0.8 V, the device enters ultra-low-current shutdown mode (<10 µA). This threshold is guaranteed across -40 °C to 150 °C and is independent of input voltage within the -20 V to +45 V range.

Can the TLE4254GAXUMA3 drive a 1 µF ceramic capacitor without oscillation?

Yes - the TLE4254GAXUMA3 is explicitly characterized and guaranteed stable with 1 µF X7R or X5R ceramic capacitors having ESR ≤5 Ω. This eliminates need for larger, less reliable electrolytic capacitors and reduces PCB footprint in space-constrained automotive modules.

Does the TLE4254GAXUMA3 provide output short-circuit status indication?

No - the GA version (including TLE4254GAXUMA3) does not include a status output. Only GS and EJS variants feature an open-collector ST pin that pulls low during overvoltage or undervoltage faults. For fault reporting, external monitoring of Q voltage or current sense is required.

How is thermal performance affected by PCB layout for the PG-DSO-8 package?

Thermal resistance drops from 155 K/W (footprint-only) to 96 K/W with a 300 mm² copper heatsink area, and further to 86 K/W with 600 mm². Four GND pins must be soldered to inner-layer planes via thermal vias; the exposed pad is absent in GA versions, so thermal relief relies entirely on GND pin conduction and PCB copper area.