Infineon Technologies TLE42662GSV33HTMA1

Overview

TLE42662GSV33HTMA1 from Infineon Technologies is a monolithic low-dropout linear voltage regulator delivering a fixed 3.3 V output with ±3% tolerance, 150 mA load capability, and ultra-low quiescent current (40 µA typical in ON mode, <1 µA in OFF mode). It features an inhibit control pin (INH), reverse polarity protection, overtemperature shutdown, and operates across -40°C to +150°C junction temperature-designed for automotive microprocessor power supply under harsh conditions.

For engineers reviewing the TLE42662GSV33HTMA1 datasheet, TLE42662GSV33HTMA1 pinout, TLE42662GSV33HTMA1 application, or TLE42662GSV33HTMA1 equivalent, key selection criteria include its 3.3 V fixed output, 1.0 V typical dropout at 100 mA, AEC-Q100 qualification, SOT223-4 package compatibility, and inhibit-driven enable/disable functionality for low-power automotive subsystems.

Technical Context

The TLE42662GSV33HTMA1 implements a bandgap-referenced feedback loop comparing a resistive divider of the 3.3 V output against a 2.5 V internal reference, enabling precise regulation across input voltages from 4.4 V to 45 V. Its SOA protection reduces maximum output current above 25 V input to prevent thermal runaway.

It integrates a dedicated INH input with internal 1 MΩ pull-down resistor and 3.5 V turn-on threshold, allowing direct microcontroller GPIO control without external biasing. Protection circuitry includes reverse-polarity blocking, thermal shutdown, and short-circuit current limiting-ensuring robust operation in automotive battery environments subject to load dump and cold crank.

Key Specifications

Pinout & Package

Supplied in PG-SOT223-4 (SOT-223-4) surface-mount package with exposed thermal pad for enhanced heat dissipation in high-ambient automotive environments.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout automotive LDO applications.

Compared with NCP1117ST33T3G and TLV73333PDBVR, the TLE42662GSV33HTMA1 uniquely combines AEC-Q100 Grade 0 qualification, reverse-polarity immunity, inhibit control, and sub-1 µA OFF current-making it the only choice for automotive modules requiring guaranteed fail-safe behavior and ultra-low standby drain.

Availability

TLE42662GSV33HTMA1 is available at Aetrix Electronics and suitable for automotive body control modules, ADAS sensor power supplies, and telematics control units requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for TLE42662GSV33HTMA1 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 industrial control solutions, with global manufacturing and quality systems certified to IATF 16949.

The OPTIREG™ linear regulator product line targets automotive power supply design, emphasizing robustness, low IQ, and functional safety-specifically engineered for ECU, sensor, and connectivity module power rails operating under extreme thermal and electrical stress.

FAQ

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

The TLE42662GSV33HTMA1 requires a minimum input voltage of 4.4 V to maintain 3.3 V output at any load up to 150 mA. At 100 mA, the typical dropout is 1.0 V, meaning 4.3 V input would still regulate-but 4.4 V is the guaranteed minimum per datasheet specifications across temperature and process variation.

Can the INH pin be left floating, or does it require external pull-up/down?

The INH pin must not be left floating. It features an internal 1 MΩ pull-down resistor that ensures default OFF state when unconnected or driven low. For reliable operation, drive it actively with a logic signal (≥3.5 V to enable, ≤0.8 V to disable); no external pull-up is needed unless interfacing with open-drain controllers.

Is an input capacitor mandatory, and what type is recommended?

Yes-an input capacitor is mandatory for stability and transient suppression. A 100 nF ceramic capacitor placed directly at the I pin is required. For long supply lines (>1 m), add a 470 µF electrolytic capacitor upstream to buffer load-dump energy. Avoid tantalum at the input due to surge-current risks during cold crank.

Does this device support parallel operation to increase output current?

No-parallel operation is not supported. The TLE42662GSV33HTMA1 lacks current-sharing features such as current-sense outputs or master/slave synchronization. Attempting parallel connection may cause unequal current distribution, thermal imbalance, and premature failure. For >150 mA, select a higher-current automotive LDO like TLE4274G or use discrete FET-based current boost.