Infineon Technologies TLE42744GSV33HUMA1

Overview

TLE42744GSV33HUMA1 from Infineon Technologies is a monolithic low-dropout linear voltage regulator delivering 3.3 V ±2% at up to 400 mA output current, with input voltage range 4.7–40 V and dropout voltage as low as 250 mV at 400 mA. It features reverse polarity protection, overtemperature shutdown, and output current limitation, and is qualified for automotive use in engine control units and body electronics.

For engineers reviewing the TLE42744GSV33HUMA1 datasheet, TLE42744GSV33HUMA1 pinout, TLE42744GSV33HUMA1 application, or TLE42744GSV33HUMA1 equivalent, key selection criteria include its PG-SOT223-4 package thermal resistance (R_thJA = 54 K/W on 2s2p board), 150 °C max junction temperature, 22 µF minimum output capacitance requirement, and AEC-Q100 qualification for under-hood environments.

Technical Context

The TLE42744GSV33HUMA1 implements an internal bandgap reference and control amplifier driving a pass transistor, with saturation control and integrated protection circuitry for overload, short-circuit, and thermal fault conditions. Its architecture enables stable regulation without external compensation when used with ≥22 µF ceramic output capacitors having ESR ≤3 Ω.

Designed specifically for permanent battery connection (VBAT) in automotive systems, it maintains regulation down to 4.7 V input while consuming ultra-low quiescent current-critical for always-on modules such as CAN transceiver power supplies and microcontroller backup rails.

Key Specifications

Pinout & Package

PG-SOT223-4 package with exposed heat slug internally connected to GND; requires PCB copper area for thermal dissipation and electrical grounding.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73333PDBVR and TPS7B8733QKVURQ1, the TLE42744GSV33HUMA1 uniquely combines AEC-Q100 Grade 0 rating, integrated reverse polarity protection, and PG-SOT223-4 thermal performance suitable for sustained 400 mA loads at 150 °C junction temperature.

Availability

TLE42744GSV33HUMA1 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera systems, and transmission control units requiring stable component supply across automotive production lifecycles.

Supply support for TLE42744GSV33HUMA1 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 automotive qualification infrastructure.

The TLE42744 belongs to Infineon's TLE automotive linear regulator product line, engineered specifically for harsh-environment power supply in engine, transmission, and chassis control systems where reliability under voltage transients and extreme temperatures is mandatory.

FAQ

What is the minimum input voltage required for regulation at full 400 mA load?

The TLE42744GSV33HUMA1 requires a minimum input voltage of 4.7 V to maintain 3.3 V output regulation at 400 mA load, as specified in the Functional Range table. Below this, dropout occurs-e.g., at 4.5 V input, output drops to approximately 3.1 V. This threshold ensures reliable operation during automotive cold-crank events.

Can the device operate without an output capacitor?

No. The TLE42744GSV33HUMA1 requires a minimum 22 µF ceramic output capacitor with ESR ≤3 Ω for stability, as defined in the Functional Range table. Omitting it causes oscillation and potential damage. The capacitor must be placed adjacent to pins 4 (Q) and 2/3 (GND) with short, low-inductance traces.

Is the heat slug electrically isolated or connected internally?

The exposed heat slug in the PG-SOT223-4 package is internally connected to GND, as confirmed in the Pin Definitions section. It must be soldered to a PCB copper pour tied to the system ground plane to ensure both thermal conduction and low-impedance grounding for noise immunity and protection circuit integrity.

Does the device support adjustable output voltage via external resistors?

No. The TLE42744GSV33HUMA1 is a fixed-output regulator with internal feedback network set to 3.3 V ±2%. It does not provide an adjust pin or external resistor divider option. For adjustable output, consider Infineon's TLE4275 series or alternative programmable LDOs.