Infineon Technologies TLE4291EXUMA2

Overview

TLE4291EXUMA2 from Infineon Technologies is a monolithic automotive-grade low-dropout linear voltage regulator in PG-SSOP-14 EP package, delivering a fixed 5.0 V ±2% output at up to 450 mA. It integrates power-on/undervoltage reset with programmable delay, standard watchdog, reverse polarity protection, overtemperature shutdown, and operates across -40 °C to +150 °C. Used to supply microcontrollers (e.g., XC22xx) in engine control units and body electronics.

For engineers reviewing the TLE4291EXUMA2 datasheet, TLE4291EXUMA2 pinout, TLE4291EXUMA2 application, or TLE4291EXUMA2 equivalent, key selection criteria include its 450 mA output capability, 1 V minimum reset-supply voltage, programmable reset/watchdog timing via external capacitor, integrated protection features, and AEC-Q100 qualification for harsh automotive environments.

Technical Context

The TLE4291EXUMA2 implements a bandgap-referenced LDO regulator core with internal current limiting and thermal shutdown. Its reset generator triggers low when input drops below an adjustable threshold (via RADJ), with delay set by capacitor on D pin; reset remains active down to VQ = 1 V.

The watchdog function monitors positive edges on WI pin and asserts WO open-collector output if no edge occurs within the timeout period-both reset and watchdog timing are independently programmable using the same external capacitor connected to D pin and GND.

Key Specifications

Pinout & Package

Package: PG-SSOP-14 EP (exposed pad), RoHS-compliant, thermally enhanced for automotive under-hood mounting.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive LDO regulator with integrated supervision applications.

Compared with TLV70750PDPKR and MAX16135ATA+T, the TLE4291EXUMA2 uniquely combines 450 mA output, full AEC-Q100 Grade 0 qualification, integrated watchdog *and* reset, and operation down to VQ = 1 V-making it the only option suitable for ASIL-B–capable engine and steering control units.

Availability

TLE4291EXUMA2 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS sensor hubs, and electric power steering systems requiring stable component supply across automotive production lifecycles.

Supply support for TLE4291EXUMA2 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 R&D and manufacturing infrastructure.

The TLE4291EXUMA2 belongs to Infineon's TLE automotive power system IC family, designed specifically for intelligent, fault-tolerant power supply and supervision in safety-critical vehicle subsystems.

FAQ

What is the minimum input voltage required for regulation?

The TLE4291EXUMA2 requires input voltage ≥ (VQ + Vdr). With 5.0 V output and typical 200 mV dropout, regulation begins at 5.2 V. Below this, output follows input (pass-through mode) until VI drops below VQ − 1 V, where reset activates.

How is the watchdog timeout period set?

The watchdog timeout is set by the same external capacitor connected between pin D and GND used for reset delay. Timeout = 1.1 × R × C, where R is internal 1.2 MΩ resistor and C is the capacitor value-e.g., 100 nF yields ~132 ms timeout.

Can pin 3 (n.c.) be left floating on the PCB?

No. Pin 3 is internally not connected but must be connected to PCB GND per datasheet recommendation to improve thermal conduction and reduce noise coupling. All n.c. pins (3,5,9,11,13) should be tied to GND.

Does the TLE4291EXUMA2 support adjustable output voltage?

No. The TLE4291EXUMA2 provides only a fixed 5.0 V ±2% output. It does not include feedback resistors or an adjust pin; output voltage is trimmed during wafer test and cannot be modified externally.