Infineon Technologies TLE42694EXUMA1

Overview

TLE42694EXUMA1 from Infineon Technologies is a monolithic automotive-grade low-dropout linear voltage regulator delivering a precise 5.0 V ±2% output at up to 150 mA, featuring integrated power-on/undervoltage reset with programmable delay, reverse polarity protection, and overtemperature shutdown. It operates across an input range of −42 V to +45 V and supports junction temperatures from −40 °C to +150 °C, making it suitable for engine control units and body electronics.

For engineers reviewing the TLE42694EXUMA1 datasheet, TLE42694EXUMA1 pinout, TLE42694EXUMA1 application, or TLE42694EXUMA1 equivalent, key selection considerations include its adjustable reset threshold (down to 1 V), 200 mV typical dropout at 100 mA, internal 20 kΩ pull-up on open-collector reset output, and PG-SSOP-14 exposed pad thermal performance.

Technical Context

The TLE42694EXUMA1 integrates a PNP pass transistor controlled by a bandgap-referenced feedback loop, with stability dependent on external output capacitor CQ (10 µF min, ESR ≤3 Ω) and input capacitor CI. Its reset generator uses an external capacitor on pin D to set power-on delay and an external resistor divider on RADJ to adjust the reset threshold below the default 4.65 V.

Protection circuitry includes current limiting (150–500 mA trip range), reverse polarity tolerance (−42 V), thermal shutdown at ~151 °C with 15 °C hysteresis, and ESD robustness per AEC-Q100 (2 kV HBM). The exposed thermal pad must be connected to GND for effective heat dissipation under high-power conditions.

Key Specifications

Pinout & Package

Package: PG-SSOP-14 with exposed thermal pad (lead-free, RoHS-compliant); footprint optimized for PCB heatsinking via direct pad-to-GND connection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73350PDBVR and TPS7B6950QDCYRQ1, the TLE42694EXUMA1 uniquely combines adjustable reset threshold, programmable delay, reverse polarity tolerance, and AEC-Q100 Grade 0 rating in a single PG-SSOP-14 package-enabling consolidated system supervision in space-constrained under-hood designs.

Availability

TLE42694EXUMA1 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera systems, and electric power steering requiring stable component supply across extended temperature and voltage stress conditions.

Supply support for TLE42694EXUMA1 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, and industrial control ICs, with global manufacturing and AEC-Q100 validation infrastructure.

The TLE42694EXUMA1 belongs to Infineon's TLE automotive linear regulator family, engineered specifically for robust 5 V supply generation in harsh environments where load dump, reverse battery, and high ambient temperature are routine operational conditions.

FAQ

What is the minimum input voltage required for regulation at full 150 mA load?

The TLE42694EXUMA1 maintains regulation down to VI = VQ + Vdr = 5.0 V + 0.33 V = 5.33 V at 150 mA (max dropout 330 mV). During cold-crank events, it sustains output as long as VI remains above this threshold, verified across −40 °C to +150 °C junction temperature.

How is the reset delay time calculated using the external capacitor on pin D?

Delay time t_delay ≈ 1.1 × R_INT × C_D, where R_INT is the internal timing resistor (~1.2 MΩ). For example, a 100 nF capacitor yields ~132 ms delay. Values between 10 nF and 1 µF are supported; ceramic capacitors are recommended for stability.

Can the exposed thermal pad be left unconnected for low-current operation?

No. The exposed pad is electrically connected to GND and thermally essential-even at 50 mA, junction temperature rise exceeds safe limits without pad-to-GND soldering. Thermal resistance increases from 47 K/W to >145 K/W if the pad is unconnected, risking premature thermal shutdown.

Does the internal 20 kΩ pull-up on RO remain active when Q is unpowered?

No. The internal pull-up connects RO to Q, not to an independent supply. If Q is unpowered (e.g., during battery disconnect), RO becomes high-impedance. An external pull-up to a separate 5 V rail is required to maintain defined reset state in all power conditions.