Infineon Technologies TLE42794GXUMA2

Overview

TLE42794GXUMA2 from Infineon Technologies is a monolithic low-dropout linear voltage regulator delivering a fixed 5.0 V ±2% output with up to 150 mA load current, integrated power-on/undervoltage reset with programmable delay, early warning sense comparator, and reverse polarity protection - designed for automotive body control modules, lighting drivers, and sensor interface circuits operating across -40 °C to +150 °C.

For engineers reviewing the TLE42794GXUMA2 datasheet, TLE42794GXUMA2 pinout, TLE42794GXUMA2 application, or TLE42794GXUMA2 equivalent, key selection criteria include its 45 V max input rating, reset threshold adjustability via external divider, 1 V minimum reset-low capability, dropout voltage under 400 mV at 150 mA, and AEC-Q100 qualification for under-hood deployment.

Technical Context

The TLE42794GXUMA2 implements a precision bandgap reference and error amplifier driving a bipolar series pass transistor with saturation control to maintain regulation under varying load and temperature. Its internal architecture integrates separate functional blocks for reset generation (with capacitor-programmable delay), sense comparator (monitoring arbitrary voltages), and protection logic for overtemperature, short-circuit, and reverse polarity.

Reset functionality operates independently of the regulator output: the RO pin asserts low when V_Q falls below an adjustable threshold (typically 4.65 V, down to 1 V), while the SI/SO pair enables early warning detection of input or auxiliary rail collapse prior to full reset activation - supporting fail-safe sequencing in multi-rail automotive ECUs.

Key Specifications

Pinout & Package

Package: PG-DSO-8 (8-pin exposed pad SOIC), RoHS-compliant, thermally enhanced for automotive under-hood use.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLE42794GM and TLE42694G, the TLE42794GXUMA2 offers optimal balance of compact PG-DSO-8 footprint, full feature set, and lowest unit cost - ideal for cost-sensitive, volume automotive modules where thermal margin is adequate and discrete pull-ups are acceptable.

Availability

TLE42794GXUMA2 is available at Aetrix Electronics and suitable for body control modules, LED lighting drivers, rear camera ECUs, and occupancy sensor interfaces requiring stable component supply across automotive production lifecycles.

Supply support for TLE42794GXUMA2 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 security solutions, with global manufacturing and automotive qualification infrastructure.

The OPTIREG™ Linear product line delivers AEC-Q100-qualified voltage regulators optimized for automotive subsystems demanding robustness against load dump, reverse battery, and extreme temperature cycling.

FAQ

What is the minimum input voltage required for regulation?

The TLE42794GXUMA2 maintains regulation down to an input voltage of V_Q + V_DO, where V_DO ≤ 400 mV at 150 mA. With a 5.0 V output, regulation is sustained from as low as 5.4 V input under full load. At lighter loads, it operates down to ~5.1 V due to lower dropout.

Can the reset function operate independently of the 5 V output?

Yes - the reset circuitry monitors the Q pin voltage directly and remains functional even if the regulator output collapses. RO asserts low when V_Q drops below the programmed threshold, enabling reliable reset signaling during output failure or severe input sag.

Is an external pull-up resistor mandatory on the RO and SO pins?

Yes - both RO and SO are open-collector outputs requiring external pull-up resistors to V_Q. The datasheet specifies maximum values (e.g., 10 kΩ for RO) to ensure proper rise time and noise immunity; omission prevents valid logic-level signaling to downstream MCUs or supervisors.

How does the early warning (SI/SO) function differ from the reset (RADJ/RO) function?

The SI/SO comparator triggers earlier than the reset function - it can be configured to assert SO at a higher voltage threshold (e.g., 4.8 V) than the RO trip point (e.g., 4.65 V), providing advance warning of impending supply collapse and enabling preemptive system actions before hard reset occurs.