Infineon Technologies TLE42694GXUMA2

Overview

TLE42694GXUMA2 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 and adjustable reset threshold down to 1 V. It operates across -42 V to +45 V input range, includes reverse polarity protection, overtemperature shutdown (151 °C), and supports junction temperatures from -40 °C to 150 °C in engine control units and body electronics.

For engineers reviewing the TLE42694GXUMA2 datasheet, TLE42694GXUMA2 pinout, TLE42694GXUMA2 application, or TLE42694GXUMA2 equivalent, key selection criteria include its 200–330 mV dropout at 100 mA, 70 dB PSRR at 100 Hz, internal 20 kΩ pull-up on open-collector reset output RO, and PG-SSOP-14 exposed pad thermal performance (R_thJA = 47 K/W).

Technical Context

The TLE42694GXUMA2 integrates a PNP pass transistor controlled by a bandgap-referenced feedback loop, where stability depends critically on output capacitor C_Q (10 µF min, ESR ≤ 3 Ω at 10 kHz) and input decoupling. Its reset generator uses an external capacitor on pin D to set power-on delay and an external resistor divider on RADJ to adjust V_Q,rt from typical 4.65 V downward.

Protection circuitry includes current limiting (150–500 mA trip range), reverse polarity tolerance (−42 V), thermal shutdown with 15 °C hysteresis, and undervoltage lockout active down to V_Q = 1 V. The exposed thermal pad must be connected to GND for effective heat dissipation under continuous 150 mA load at high ambient temperatures.

Key Specifications

Pinout & Package

Package: PG-SSOP-14 with exposed thermal pad (RoHS-compliant, AEC-Q100 qualified). Exposed pad must be soldered to GND plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73350PDBVR and MAX16910ATA+T, the TLE42694GXUMA2 uniquely combines AEC-Q100 Grade 0 qualification, −42 V reverse protection, adjustable reset threshold, and exposed-pad thermal design-making it irreplaceable for under-hood ECU and BCM applications demanding functional safety compliance.

Availability

TLE42694GXUMA2 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS sensor power supplies, and infotainment subsystems requiring stable component supply across extended automotive lifecycles.

Supply support for TLE42694GXUMA2 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 industrial control ICs, with global manufacturing and AEC-Q100 validation infrastructure.

The TLE42694GXUMA2 belongs to Infineon's TLE automotive power management family, engineered specifically for robust 5 V supply generation in harsh automotive environments-including start-stop, load dump, and reverse battery conditions.

FAQ

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

The TLE42694GXUMA2 maintains 5.0 V regulation down to VI = V_Q + V_dr = 5.0 V + 0.33 V = 5.33 V at 100 mA; at 150 mA, dropout increases slightly but remains within 350 mV. Therefore, minimum functional input is approximately 5.35 V under worst-case conditions, verified per datasheet Section 4.1.5.

Can the reset output (RO) be used without connecting it to the Q output rail?

Yes - RO is an open-collector output with no internal connection to Q except via the 20 kΩ pull-up resistor. To use RO independently, disconnect it from Q and add an external pull-up to the desired voltage rail (e.g., 3.3 V), ensuring voltage compatibility with downstream logic inputs per datasheet Table 1 and Section 4.2.2.

How does the thermal shutdown behave during sustained overload?

Under continuous overload (e.g., output short), the TLE42694GXUMA2 enters thermal shutdown at T_j ≥ 151 °C, disables the pass transistor, cools, then automatically restarts - causing oscillatory output. This cycling continues until the fault is removed; prolonged operation above 150 °C degrades lifetime, per Absolute Maximum Ratings Section 3.1.5.

Is the exposed thermal pad electrically isolated or must it be connected to GND?

The exposed pad is electrically connected to GND internally and must be soldered to a GND plane on the PCB. Leaving it unconnected compromises both thermal performance (increasing R_thJA by >20 K/W) and electrical integrity, as confirmed in Package Outline PG-SSOP-14 documentation and Thermal Resistance Table 3.3.5–3.3.9.