Infineon Technologies TLE9261BQXV33XUMA1

Overview

TLE9261BQXV33 from Infineon Technologies is an automotive-qualified System Basis Chip (SBC) integrating dual voltage regulators (3.3 V/250 mA main, 5 V/100 mA auxiliary), a high-speed CAN FD transceiver (up to 5 Mbit/s), four 7 Ω high-side switches, two HV GPIOs, three HV wake inputs, and SPI-based supervision. It serves as central power management and communication interface in body control modules requiring fail-safe operation and partial networking.

For engineers reviewing the TLE9261BQXV33 datasheet, TLE9261BQXV33 pinout, TLE9261BQXV33 application, or TLE9261BQXV33 equivalent, this device supports critical automotive subsystems including door closure control, HVAC actuation, light management, and gateway node communication with integrated diagnostics and cyclic wake capability.

Technical Context

The TLE9261BQXV33 implements a multi-state machine architecture supporting Normal, Stop, Sleep, Fail-Safe, and Development modes, with configurable wake sources including cyclic sense, internal timer, and HV wake inputs (WK1–WK3). Its CAN FD transceiver complies with ISO 11898-2:2016 and SAE J2284, enabling partial networking and bus dominant clamping.

Voltage regulation includes three independent paths: a fixed 3.3 V main LDO, a fixed 5 V auxiliary LDO, and a programmable external regulator stage using an external PNP transistor for 3.3 V or 1.8 V output with load sharing or off-board usage protection. Supervision features include watchdog timeout, interrupt generation, reset assertion, and fail-safe outputs (FO1–FO3).

Key Specifications

Pinout & Package

Package: PG-VQFN-48 (7 mm × 7 mm, 0.5 mm pitch, exposed thermal pad).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar System Basis Chip applications.

Compared with TLE9261BQXV33, TLE9262BQXV33 offers identical footprint and enhanced 3.3 V redundancy but sacrifices 5 V sensor support, while MC33816PAE provides basic LIN integration at lower complexity but cannot replace CAN FD or cyclic wake functionality in modern gateways.

Availability

TLE9261BQXV33 is available at Aetrix Electronics and suitable for Body Control Modules, HVAC actuation systems, and trailer gateway designs requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.

Supply support for TLE9261BQXV33 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 qualification infrastructure.

The OPTIREG™ SBC family targets automotive body electronics, delivering integrated power, communication, and supervision functions to reduce system complexity and improve functional safety in distributed ECUs.

FAQ

What is the maximum allowable input voltage for the VCC pin?

The absolute maximum rating for VCC is 40 V, but the functional operating range is 5 V to 28 V per datasheet Rev. 1.2 Section 4.2. Operation above 28 V risks triggering undervoltage lockout or thermal shutdown; sustained 36 V input exceeds specification and may cause permanent damage.

Does the TLE9261BQXV33 support CAN FD Classic arbitration and FD data phases simultaneously?

Yes - the integrated CAN transceiver fully supports ISO 11898-2:2016, enabling simultaneous Classic CAN arbitration (dominant recessive bit timing) and CAN FD data phase (up to 5 Mbit/s with flexible DLC and CRC). Partial networking mode allows selective node wake-up without full bus activation.

Can the external voltage regulator stage be used without an external PNP transistor?

No - the external regulator stage (VR3) requires an external PNP transistor (e.g., PBSS4041P) and shunt resistor (R_SHUNT) to set output voltage and current limit. Omitting the PNP disables VR3 functionality; the pin (VR3_OUT) remains unconnected and must be left floating or tied to GND per Section 8.5.

How is fail-safe behavior triggered and what outputs assert during fail-safe mode?

Fail-safe mode activates on detected faults including main regulator undervoltage, overtemperature (>150 °C), watchdog timeout, or CAN bus error accumulation. FO1 asserts low (open-drain), FO2/FO3 enter configurable states (default: FO2 high, FO3 low), and all HS outputs disable - verified in Section 5.1.6 and Table 13-1 of the datasheet.