Infineon Technologies TLE42662GSV33HTMA2

Overview

TLE42662GSV33HTMA2 from Infineon Technologies is a monolithic low-drop fixed linear voltage regulator delivering 3.3 V at up to 150 mA, with ±3% output tolerance, 1.0–1.1 V dropout at 100 mA, and inhibit-controlled ON/OFF operation. It features reverse polarity protection, overtemperature shutdown, and operates across −40 °C to +150 °C junction temperature-designed for automotive microprocessor power rails.

For engineers reviewing the TLE42662GSV33HTMA2 datasheet, TLE42662GSV33HTMA2 pinout, TLE42662GSV33HTMA2 application, or TLE42662GSV33HTMA2 equivalent, key selection criteria include its 3.3 V output accuracy under wide input (4.4–45 V), ultra-low quiescent current (40 µA typical in ON mode, <1 µA in OFF), and AEC-Q100 qualification for harsh automotive environments.

Technical Context

The TLE42662GSV33HTMA2 implements a bandgap-referenced control loop comparing a resistive divider of the 3.3 V output against a 2.5 V internal reference. Regulation is maintained via a pass transistor with SOA-limited current reduction above 25 V input to prevent thermal runaway.

Its inhibit function uses an integrated 1 MΩ pull-down resistor and requires ≥3.5 V on INH to enable regulation; below 0.8 V it forces shutdown. Protection includes thermal foldback, short-circuit current limiting, and reverse-polarity robustness-enabling direct battery connection without external diodes.

Key Specifications

Pinout & Package

Package: PG-SOT223-4 (surface-mount, thermally enhanced 4-pin SOT-223 variant with exposed thermal pad).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73333PDBVR and TLE42744DV33, the TLE42662GSV33HTMA2 uniquely balances AEC-Q100 Grade 0 qualification, 1.1 V dropout at 100 mA, inhibit control, and sub-1 µA OFF current-making it optimal for space-constrained, thermally aggressive automotive nodes requiring intelligent power gating.

Availability

TLE42662GSV33HTMA2 is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, body control modules, and infotainment displays requiring stable component supply across extended automotive temperature and voltage ranges.

Supply support for TLE42662GSV33HTMA2 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, and industrial control ICs, with leadership in AEC-Q100-qualified analog and power solutions.

The OPTIREG™ linear regulator product line delivers robust, low-quiescent-current LDOs engineered specifically for automotive subsystems where reliability under extreme thermal, electrical, and mechanical stress is mandatory.

FAQ

What is the minimum input voltage required for regulation at 3.3 V output?

The TLE42662GSV33HTMA2 requires a minimum input voltage of 4.4 V to maintain 3.3 V regulation at full load, based on its maximum dropout of 1.10 V at 100 mA. Below this, output voltage collapses linearly; operation is not guaranteed below 4.4 V per datasheet Section 3.

Can the INH pin be left floating, or does it require external biasing?

The INH pin must not be left floating: it has an internal 1 MΩ pull-down resistor that ensures safe default-OFF behavior, but floating connections risk noise-induced false enabling. For reliable operation, drive INH actively high (≥3.5 V) to enable or low (≤0.8 V) to disable-no external pull-up is needed.

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 between pin 1 (I) and pin 4 (GND) is required. For long supply lines (>1 m), add a 470 µF electrolytic capacitor upstream to buffer load-dump energy, as specified in Figure 3 of the datasheet.

How does thermal performance change when mounted on a standard 4-layer PCB versus the reference 80×80 mm² test board?

On a standard 4-layer PCB with limited copper area, junction-to-ambient thermal resistance will exceed the datasheet's 81 K/W (measured on 80×80×1.5 mm³ board with 300 mm² heatsink). Derate output current accordingly-e.g., at 150 mA and 45 V input, ensure board layout provides ≥500 mm² of 2-oz copper connected to pin 4 (GND) to avoid exceeding 150 °C junction temperature.