Infineon Technologies TLE42694GXUMA1

Overview

TLE42694GXUMA1 from Infineon Technologies is an AEC-Q100 qualified monolithic low-dropout voltage regulator for automotive power management, delivering a stable 5.0 V ±2% output at up to 150 mA load current, with input voltage range from −42 V to 45 V, integrated reverse polarity protection, and programmable power-on reset functionality. It operates across −40 °C to 150 °C junction temperature and features internal overtemperature shutdown and output current limiting.

For engineers reviewing the TLE42694GXUMA1 datasheet, TLE42694GXUMA1 pinout, TLE42694GXUMA1 application, or TLE42694GXUMA1 equivalent, key selection criteria include its adjustable reset threshold (down to 1 V), 200 mV typical dropout at 100 mA, 70 dB PSRR at 100 Hz, exposed-pad PG-SSOP-14 thermal performance, and automotive-grade functional safety support for body control modules and ADAS sensor supplies.

Technical Context

The TLE42694GXUMA1 integrates a PNP pass transistor controlled by a bandgap-referenced feedback loop, with stability conditioned on output capacitor ESR (≤3 Ω) and capacitance (≥10 µF). Its reset generator uses an external capacitor on pin D to set delay time and an external resistor divider on RADJ to adjust threshold from internal 4.65 V down to 1 V.

Protection circuitry includes reverse polarity handling (−42 V tolerance), thermal shutdown at ~151 °C with 15 °C hysteresis, and current limiting that degrades above VI = 22 V to limit dissipation. The open-collector RO output includes a 20 kΩ internal pull-up to Q and remains functional down to VQ = 1 V.

Key Specifications

Pinout & Package

Package: PG-SSOP-14 with exposed thermal pad (lead-free, RoHS-compliant); footprint optimized for PCB heat spreading and automotive vibration resilience.

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 TLE42694GXUMA1 uniquely combines AEC-Q100 Grade 0 rating, adjustable reset threshold down to 1 V, and reverse polarity tolerance to −42 V-making it the only choice for under-hood safety-critical LDO applications demanding full ISO 7637-2 immunity.

Availability

TLE42694GXUMA1 is available at Aetrix Electronics and suitable for body control modules, ADAS camera supplies, electronic parking brake actuators, and automotive gateway ECUs requiring stable component supply across extended temperature and harsh electrical environments.

Supply support for TLE42694GXUMA1 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 automotive qualification infrastructure.

The TLE42694GXUMA1 belongs to Infineon's TLE automotive linear regulator product line, engineered specifically for robust, fault-tolerant power delivery in engine compartment and safety-critical vehicle subsystems.

FAQ

What is the minimum output capacitance required for stable operation?

The TLE42694GXUMA1 requires a minimum 10 µF ceramic output capacitor with ESR ≤3 Ω at 10 kHz. This value ensures loop stability across the full −40 °C to +150 °C temperature range and 100 mA load. Using 4.7 µF is permitted only if ESR is ≤2.7 Ω, but 10 µF is recommended for worst-case tolerance margin and transient response.

How does the reset delay time get programmed?

Reset delay is set by connecting a ceramic capacitor between pin D (Pin 3) and GND. The delay time scales linearly with capacitance: 100 nF yields ~100 ms, 1 µF yields ~1 s. The capacitor must be placed close to the IC with short traces; tantalum or electrolytic types are not recommended due to leakage and aging effects.

Can the TLE42694GXUMA1 operate with input voltage below the output voltage?

Yes-the device supports reverse polarity operation down to −42 V on the input pin, enabling protection against battery misconnection. During reverse bias, small leakage currents flow into the IC, raising junction temperature; thermal design must account for this since internal thermal protection is inactive in reverse-polarity mode.

Is the exposed thermal pad electrically connected internally?

Yes, the exposed pad is internally connected to GND and serves as both primary thermal conduction path and electrical ground reference. It must be soldered to a dedicated GND copper area ≥300 mm² on the PCB, with thermal vias to inner layers, to achieve the specified R_thJA = 47 K/W and sustain 150 mA continuous output current.