Infineon Technologies TLE42712GATMA1

Overview

TLE42712GATMA1 from Infineon Technologies is a 5-V fixed-output, low-dropout linear voltage regulator with integrated watchdog and reset generator, designed for automotive power supply rails. It delivers ±2% output voltage accuracy over 5 mA–550 mA load, supports up to 42 V DC input (65 V transient ≤400 ms), and features reverse polarity protection, overtemperature shutdown, and inhibit-controlled enable/disable functionality. Used in engine control units, body control modules, and ADAS domain controllers requiring robust 5-V biasing.

For engineers reviewing the TLE42712GATMA1 datasheet, TLE42712GATMA1 pinout, TLE42712GATMA1 application, or TLE42712GATMA1 equivalent, key selection criteria include dropout voltage at 550 mA (≤700 mV), watchdog timing tolerance (±25% over temperature), reset delay adjustability via external capacitor, and AEC-Q100 Grade 1 qualification for under-hood operation.

Technical Context

The TLE42712GATMA1 integrates a bandgap reference, error amplifier, pass transistor, and protection circuitry into a single monolithic IC. Its architecture includes an internal 30 kΩ pull-up on the open-collector reset output (RO), programmable reset delay via external capacitor on pin D, and a dedicated watchdog input (WI) with adjustable timeout (40–80 ms typical).

It operates across -40°C to +150°C junction temperature, with thermal resistance R_thJC = 3 K/W and R_thJA = 65–70 K/W depending on PCB layout. The inhibit (INH) input enables system-level power sequencing, while overvoltage protection triggers at 40–46 V and latches off until input drops below 30 V.

Key Specifications

Pinout & Package

Package: PG-TO263-7 (TO-263-7), thermally enhanced surface-mount package with exposed thermal pad; marking "4271-2G".

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV70715PDRVR and MAX16910ATA+T, the TLE42712GATMA1 uniquely combines AEC-Q100 Grade 1 qualification, adjustable reset delay, and integrated 30 kΩ pull-up on RO-reducing external component count and enabling tighter timing control in safety-critical ECUs.

Availability

TLE42712GATMA1 is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS domain controllers requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for TLE42712GATMA1 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 R&D infrastructure.

The OPTIREG™ Linear product line delivers AEC-Q100-qualified voltage regulators for automotive subsystems, emphasizing robustness against load dump, reverse battery, and thermal stress in harsh environments.

FAQ

What is the maximum allowable input voltage for continuous operation?

The TLE42712GATMA1 supports continuous input voltages from 6 V to 40 V. It tolerates up to 65 V for ≤400 ms during load dump events per ISO 7637-2 Pulse 5a, after which it enters overvoltage latch-off until input drops below ~30 V.

How is the reset delay time adjusted, and what capacitor value yields 15 ms?

Reset delay is set by connecting a capacitor between pin D and GND. With a 100 nF capacitor, delay is 8–18 ms (typ. 13 ms). For 15 ms nominal delay, use 120 nF ceramic capacitor-verified in Figure 15 of Rev. 2.8 datasheet.

Does the watchdog require an external clock source, or is timing generated internally?

Timing is fully internal and capacitor-based: a single capacitor on pin D sets both reset delay and watchdog period. No external clock or crystal is needed-the device uses internal current sources and thresholds to generate 40–80 ms watchdog timeouts and corresponding trigger windows.

Can the RO pin drive a microcontroller's external interrupt input directly?

Yes-RO is an open-collector output with internal 30 kΩ pull-up to Q (5 V). It sinks up to 3 mA with ≤400 mV saturation voltage, compatible with standard 5 V CMOS interrupt inputs. No external pull-up is required unless interfacing with 3.3 V logic, in which case a level-shifting resistor divider is recommended.