Infineon Technologies TLE42694GMXUMA2

Overview

TLE42694GMXUMA2 from Infineon Technologies is a monolithic automotive-grade low-dropout linear voltage regulator delivering a stable 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 TLE42694GMXUMA2 datasheet, TLE42694GMXUMA2 pinout, TLE42694GMXUMA2 application, or TLE42694GMXUMA2 equivalent, key selection considerations include its adjustable reset threshold (down to 1 V), 200 mV typical dropout at 100 mA, 70 dB PSRR at 100 Hz, exposed-pad SSOP-14 thermal performance, and AEC-Q100 qualification for automotive use.

Technical Context

The TLE42694GMXUMA2 implements a PNP pass transistor topology with internal bandgap reference and saturation control, enabling stable regulation under wide input transients and load steps. 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 from the default 4.65 V down to 1 V.

Thermal protection includes hysteresis-based shutdown (151 °C trip, ~15 °C hysteresis) and current limiting that de-rates above 22 V input to prevent excessive dissipation. Reverse polarity operation allows limited conduction below ground but disables thermal protection-requiring external thermal design consideration.

Key Specifications

Pinout & Package

Package: PG-SSOP-14 with exposed thermal pad (RoHS-compliant, AEC-Q100 qualified). The exposed pad must be soldered to a PCB heatsink area (recommended ≥300 mm²) and connected to GND for optimal thermal resistance (R_thJA = 63 K/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73350PDBVR and MAX16922ATP+T, the TLE42694GMXUMA2 uniquely combines AEC-Q100 qualification, −42 V reverse polarity tolerance, and field-adjustable reset in a thermally optimized SSOP-14 package-making it the only choice for cost-sensitive, high-reliability automotive power domains requiring full fault coverage.

Availability

TLE42694GMXUMA2 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera ECUs, and electric power steering control units requiring stable component supply under extended temperature and harsh electrical environments.

Supply support for TLE42694GMXUMA2 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 electronics, and security solutions, with global manufacturing and R&D infrastructure.

The TLE42694GMXUMA2 belongs to Infineon's TLE automotive linear regulator product line, engineered specifically for robust, fault-tolerant power supply in engine, chassis, and safety-critical electronic control units.

FAQ

What is the minimum output capacitance required for stable operation?

The TLE42694GMXUMA2 requires a minimum 4.7 µF ceramic or tantalum output capacitor with ESR ≤2.7 Ω at 10 kHz. For worst-case tolerance (−40%), a 10 µF capacitor with ESR ≤3 Ω is recommended. Placement must be within 5 mm of pins 11 (Q) and 4/6 (GND) to ensure loop stability 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. Delay time follows t_delay ≈ 1.1 × R_int × C_ext, where R_int is a fixed internal resistor (~1.1 MΩ). A 100 nF capacitor yields ~120 ms delay; values from 10 nF to 1 µF cover 1–1000 ms range. Do not use electrolytic capacitors due to leakage.

Can the TLE42694GMXUMA2 operate with input voltage below ground?

Yes-it tolerates −42 V input with reverse polarity protection active, but thermal shutdown is disabled in this mode. Small reverse currents flow into the IC, raising junction temperature. Thermal design must account for this; the exposed pad must be connected to GND and a heatsink area ≥300 mm² is strongly advised to avoid exceeding 150 °C.

Is an input capacitor mandatory?

Yes-an input capacitor (CI) is strongly recommended between pin I (Pin 13) and GND to suppress line transients and improve PSRR. Use a low-ESR ceramic capacitor ≥1 µF placed within 5 mm of the IC. Without CI, the regulator may exhibit instability or degraded ripple rejection, especially during load dump events per ISO 7637-2.