Infineon Technologies TLE42642GHTMA1

Overview

TLE42642GHTMA1 from Infineon Technologies is a monolithic 5 V low-dropout linear voltage regulator in PG-SOT223-4 package, delivering up to 150 mA output current with ±3% output voltage tolerance (±2% up to 50 mA), 40 µA quiescent current, and operation from 5.5 V to 45 V input. It integrates overtemperature, short-circuit, reverse-polarity, and SOA protection for automotive microprocessor power supply.

For engineers reviewing the TLE42642GHTMA1 datasheet, TLE42642GHTMA1 pinout, TLE42642GHTMA1 application, or TLE42642GHTMA1 equivalent, key selection criteria include ultra-low I_Q, AEC-Q100 qualification, thermal robustness to 150°C junction, drop voltage ≤0.5 V at 100 mA, and compatibility with 10 µF/ESR ≤4 Ω output capacitors.

Technical Context

The TLE42642GHTMA1 uses an internal bandgap reference (2.5 V typical) and resistive feedback divider to regulate output to 5 V via a series pass transistor controlled by a high-gain error amplifier. Saturation control dynamically limits base drive to prevent power element over-saturation under heavy load.

Protection circuitry includes thermal shutdown triggered above 150°C junction temperature, foldback current limiting activated during short-circuit, and reverse-polarity blocking diode integration. SOA protection reduces output current above 25 V input to maintain safe power dissipation.

Key Specifications

Pinout & Package

Package: PG-SOT223-4 - thermally enhanced surface-mount package with exposed thermal pad (pin 4), footprint optimized for PCB heat spreading on 300 mm² copper area.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output LDO regulator applications.

Compared with TLV73350PDBVR and NCV8664ST50T3G, the TLE42642GHTMA1 uniquely combines AEC-Q100 Grade 0 qualification, 150°C operation, SOA protection, and reverse-polarity immunity-making it the only choice for primary 5 V regulation in harsh automotive domains.

Availability

TLE42642GHTMA1 is available at Aetrix Electronics and suitable for body control modules, instrument clusters, transmission control units, and ADAS camera ECUs requiring stable component supply across extended temperature and automotive lifecycle demands.

Supply support for TLE42642GHTMA1 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 AEC-Q100-qualified linear regulators engineered specifically for automotive power supply architectures-emphasizing ultra-low I_Q, thermal resilience, and integrated protection for ECU subsystems.

FAQ

What is the maximum allowable input voltage for continuous operation?

The TLE42642GHTMA1 supports continuous operation up to 45 V input, with absolute maximum rating at 45 V. During load-dump events, it withstands 40 V transients per ISO 7637-2 Pulse 5a, provided external clamping or TVS is used for sustained >40 V exposure.

Can this regulator operate with a 10 µF X7R ceramic capacitor on the output?

Yes-datasheet specifies ≥10 µF output capacitance with ESR ≤4 Ω at 10 kHz, fully satisfied by standard X7R MLCCs. Stability testing confirms phase margin >45° with 10 µF/2 mΩ MLCC, eliminating need for tantalum or polymer alternatives.

Is pin 4 electrically connected to ground in the PG-SOT223-4 package?

Yes-pin 4 is the exposed thermal pad and is internally connected to GND. It must be soldered to a dedicated PCB ground plane with ≥4 thermal vias (0.3 mm diameter) to achieve specified R_thj-a = 81 K/W with 300 mm² copper area.

Does the TLE42642GHTMA1 require an input capacitor, and what value is recommended?

Yes-an input capacitor is mandatory. A 100 nF ceramic capacitor placed directly between pin 1 (I) and pin 2 (GND) is required to suppress high-frequency noise and prevent oscillation. For long supply lines (>1 m), add a 470 µF electrolytic capacitor upstream to buffer low-frequency transients.