Infineon Technologies TLE42764DV50ATMA1

Overview

TLE42764DV50ATMA1 from Infineon Technologies is a monolithic low-dropout linear voltage regulator delivering a fixed 5 V ±2% output at up to 400 mA, with enable control, reverse polarity protection, and operation across -40°C to +150°C. Designed for automotive power rails, it regulates input voltages from 5.5 V to 40 V while maintaining ultra-low quiescent current (<10 µA in shutdown) and dropout as low as 0.5 V at full load.

For engineers reviewing the TLE42764DV50ATMA1 datasheet, TLE42764DV50ATMA1 pinout, TLE42764DV50ATMA1 application, or TLE42764DV50ATMA1 equivalent, key selection criteria include AEC-Q100 qualification, integrated overtemperature and current limiting, PG-TO252-5 thermal performance, and compatibility with permanent battery-connected (VBAT) systems requiring stable 5 V supply under harsh transients.

Technical Context

The device implements a bandgap reference, error amplifier, and saturation-controlled pass transistor to regulate output voltage with precision feedback. Protection circuitry includes thermal shutdown triggered above 165°C junction temperature and foldback current limiting activated during short-circuit conditions.

Its enable input features an internal pull-down resistor and accepts TTL/CMOS-compatible logic levels; assertion of EN >2.0 V enables regulation, while EN <0.8 V disables output and reduces quiescent current to <10 µA. The VA pin is unconnected (n.c.) in the DV50 variant, confirming fixed 5 V configuration without external adjustment.

Key Specifications

Pinout & Package

Package: PG-TO252-5 (D-Pak), thermally enhanced with exposed GND slug soldered to PCB copper for efficient heat dissipation in high-ambient automotive environments.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout linear regulator applications.

Compared with NCP1117ST50T3G and TLV73350PDBVR, TLE42764DV50ATMA1 uniquely combines AEC-Q100 Grade 0 qualification, 40 V input tolerance, reverse polarity immunity, and 400 mA continuous output in a thermally optimized D-Pak-making it the only choice for safety-critical, high-reliability automotive power nodes.

Availability

TLE42764DV50ATMA1 is available at Aetrix Electronics and suitable for Body Control Modules, Engine Control Units, Telematics Gateways, and ADAS Camera Systems requiring stable component supply under automotive qualification and long-term lifecycle assurance.

Supply support for TLE42764DV50ATMA1 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 AEC-Q100 validation infrastructure.

The TLE42764 belongs to Infineon's OPTIREG™ linear family, engineered specifically for automotive power supply resilience-delivering robust regulation, integrated protection, and extended temperature operation in engine, chassis, and safety-critical domains.

FAQ

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

The TLE42764DV50ATMA1 requires a minimum input voltage of 5.5 V to maintain 5 V output at 400 mA, based on its 0.5 V dropout specification. Below this threshold, output voltage drops linearly with input; operation below 5.5 V is unsupported and may trigger undervoltage lockout behavior in downstream circuits.

Can the VA pin be left unconnected in the TLE42764DV50ATMA1?

Yes-the VA pin is designated "n.c." (no connect) for the DV50 variant and has no electrical function. It may be left floating or tied to GND without affecting regulation, as the 5 V output is internally trimmed and does not rely on external feedback resistors.

Is external output capacitance mandatory, and what are the limits?

Yes-minimum 22 µF output capacitance with ESR ≤3 Ω at 10 kHz is required for stability per datasheet Section 3.2. Ceramic capacitors meeting these specs ensure phase margin >45°; using lower capacitance or higher ESR risks oscillation or poor transient response during load steps.

How does the enable function behave during power-up sequences?

The EN pin has an internal pull-down resistor (~100 kΩ), ensuring the device remains disabled until a valid high-level signal (>2.0 V) is applied. This prevents uncontrolled power-on sequencing and allows synchronization with system controllers or watchdog timers before enabling regulated output.