Infineon Technologies TLE42694GMCT

Overview

TLE42694GMCT from Infineon Technologies is a monolithic low-dropout linear voltage regulator delivering a precise 5.0 V ±2% output with up to 150 mA load current, integrated early-warning sense comparator, programmable power-on/undervoltage reset (V_Q,rt = 4.65 V typ.), and reverse polarity protection - deployed in automotive body control modules for ECU power rail stabilization.

For engineers reviewing the TLE42694GMCT datasheet, TLE42694GMCT pinout, TLE42694GMCT application, or TLE42694GMCT equivalent, key selection criteria include its −42 V to +45 V input range, reset delay timing via external capacitor, adjustable reset threshold using RADJ, 1 V minimum reset operation, and AEC-Q100 qualification for under-hood environments.

Technical Context

The TLE42694GMCT integrates a precision bandgap reference, error amplifier, and saturation-controlled series pass transistor to maintain regulation across wide input transients and load steps. Its dual open-collector outputs (RO and SO) each feature internal 20 kΩ pull-up resistors to Q, enabling direct interface with 5 V logic without external components.

It implements three independent protection circuits: output current limiting (short-circuit proof), thermal shutdown at ~170 °C junction temperature, and reverse polarity protection down to −42 V. The sense comparator monitors arbitrary voltages (e.g., battery or MCU supply) and asserts SO low on undervoltage - decoupled from the main regulator path.

Key Specifications

Pinout & Package

Package: PG-DSO-14 (14-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 NCP1117ST50T3G and TLE42794G, the TLE42694GMCT uniquely combines AEC-Q100 qualification, integrated diagnostics (reset + sense), and automotive-grade fault tolerance in a single PG-DSO-14 package - eliminating external components while meeting functional safety readiness requirements.

Availability

TLE42694GMCT is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera systems, and electric power steering applications requiring stable component supply across extended temperature and voltage stress conditions.

Supply support for TLE42694GMCT 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 R&D and manufacturing infrastructure.

The OPTIREG™ Linear product line delivers robust, AEC-Q100-qualified voltage regulators optimized for harsh automotive environments - emphasizing fault resilience, wide input range, and integrated system-monitoring features.

FAQ

What is the minimum input voltage required for regulation?

The TLE42694GMCT regulates down to V_IN = V_OUT + V_DO, where typical dropout is 300 mV at 150 mA. Thus, it maintains 5 V output with input as low as 5.3 V. It remains functional (but not regulating) down to −42 V input due to reverse-polarity protection.

Can the reset output drive a 3.3 V logic input directly?

No - RO and SO are open-collector outputs pulled internally to Q (5 V). To interface with 3.3 V logic, an external pull-down resistor or level-shifter is required. Alternatively, use TLE42794G which omits internal pull-ups for full design flexibility.

How does the early warning sense function differ from the reset function?

The sense comparator monitors SI independently of the output voltage; it asserts SO low when SI falls below the RADJ-set threshold. Reset (RO) activates only when regulated output Q drops below that same threshold - making sense ideal for pre-failure detection of upstream rails.

Is the exposed pad on the PG-DSO-14 package electrically connected?

Yes - the exposed pad is internally connected to GND and must be soldered to a large PCB copper pour tied to all GND pins. This provides critical thermal conduction and low-impedance grounding for noise suppression and thermal derating up to 150 °C ambient.