Infineon Technologies TLE6711GLXUMA1

Overview

TLE6711GLXUMA1 from Infineon is a multifunctional automotive power supply IC integrating a boost converter (programmable output), a 5 V ±2% buck regulator with short-circuit protection, digital window watchdog, power-on/off reset generator, and system enable output. It operates from −40 °C to +125 °C ambient, supports 5–35 V boost input, delivers 5 V logic supply, and features OVL/SEN open-drain fault outputs for engine control units.

For engineers reviewing the TLE6711GLXUMA1 datasheet, TLE6711GLXUMA1 pinout, TLE6711GLXUMA1 application, or TLE6711GLXUMA1 equivalent, key selection criteria include verified boost/buck voltage tolerance, watchdog window timing (tCW = 32 cycles, tOW ≤ 32 cycles), thermal resistance (65 K/W for PG-DSO-20-36), AEC-Q100 qualification, and SO-20 pin mapping for microcontroller supervision in safety-critical ECUs.

Technical Context

The device implements dual DC-DC regulation: a step-up converter generating programmable VBOOST (up to 35 V) and a precision 5 V buck output (VBUO) with ±2% tolerance and full short-circuit protection. Its digital window watchdog uses an internal oscillator-based timebase (100 clock periods per cycle) with closed-window (32 cycles) and open-window (≤32 cycles) detection logic.

Reset generation is synchronized to VCC crossing 4.65 V threshold with 64-cycle delay (tRD); overtemperature shutdown activates at Tj ≥ 150 °C. All protection functions-including boost/buck under- and overvoltage lockout and glitch-immune WDI sampling (2H+2L validation)-are implemented in monolithic SPT® technology combining bipolar, CMOS, and DMOS on one die.

Key Specifications

Pinout & Package

Package: PG-DSO-20-36 (20-pin, exposed thermal pad, RoHS-compliant, AEC-Q100 qualified).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multifunctional automotive power supply applications.

Compared with TLF35584QVVS1 and MAX25201ATPA/VY+, the TLE6711GLXUMA1 uniquely integrates programmable boost regulation with digital window watchdog in a single PG-DSO-20 package-enabling compact, cost-optimized ECU designs where external boost conversion is already present and ASIL-D is not required.

Availability

TLE6711GLXUMA1 is available at Aetrix Electronics and suitable for engine control units, transmission control modules, ADAS camera modules, and electric power steering systems requiring stable component supply across automotive production lifecycles.

Supply support for TLE6711GLXUMA1 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 industrial control solutions, with global R&D and manufacturing infrastructure.

The TLE6711 product line delivers integrated power-supervision ICs for automotive ECUs, designed to replace discrete reset, watchdog, and voltage regulation circuits while meeting AEC-Q100 Grade 0 and ISO 26262 functional safety requirements.

FAQ

What is the function of the BOFB pin?

The BOFB (Boost Feedback) pin accepts a resistor divider from the external boost converter output to set VBOOST via an internal 3.0 V reference threshold. It enables precise regulation of the boost voltage feeding the buck stage, supporting programmable output levels between 5 V and 35 V without external DAC or microcontroller intervention.

How does the digital window watchdog detect MCU faults?

The watchdog uses a fixed 100-cycle oscillator period as its timebase. After power-up, it opens a 32-cycle closed window: any trigger during this interval causes a pretrigger failure. Then it opens a ≤32-cycle open window; absence of a valid trigger (2H+2L sampled over consecutive cycles) within this window forces RO low for 64 cycles, resetting the MCU.

Is external compensation required for the buck regulator?

Yes. The BUC (Buck Compensation) pin is the error amplifier output and must be connected to GND via an external RC series network. This network sets the pole-zero locations for loop stability-typical values are 10 kΩ and 1 nF-ensuring phase margin >45° across 10 mA–1.2 A load current range.

What thermal derating applies above 100 °C ambient?

With R_thj-a = 65 K/W, maximum allowable power dissipation drops linearly above 100 °C ambient: at 125 °C ambient, junction temperature reaches 150 °C at P_D = (150−125)/65 ≈ 0.385 W. Layout must include thermal vias under the exposed pad and ≥2 oz copper to sustain rated 1.2 A buck output at full temperature range.