Infineon Technologies TLS850A4TEV50ATMA1

Overview

TLS850A4TEV50ATMA1 from Infineon Technologies is an AEC-Q100-qualified ultra-low-quiescent-current linear voltage regulator delivering 5 V at up to 500 mA output current, with 4.3 µA typical IQ at light load, 3.7–40 V input range, and 190 mV dropout at <100 mA - designed for permanent-battery-connected automotive systems operating through cranking.

For engineers reviewing the TLS850A4TEV50ATMA1 datasheet, TLS850A4TEV50ATMA1 pinout, TLS850A4TEV50ATMA1 application, or TLS850A4TEV50ATMA1 equivalent, key selection criteria include quiescent current under microamp-level standby loads, cranking-voltage resilience (down to 3.7 V), ceramic-capacitor stability (4.7 µF), thermal performance in TO252-3 packages, and integrated overtemperature/current protection.

Technical Context

This regulator uses a bandgap reference-based control loop optimized for fast transient response and high stability with minimal external components. Its architecture supports operation down to 3.7 V input while maintaining regulated 5 V output - critical for engine cranking where battery voltage dips below 6 V.

Internal protection includes foldback current limiting and thermal shutdown triggered at junction temperatures exceeding 150 °C. The device is rated for continuous operation across –40 °C to +150 °C ambient, with thermal resistance R_thJC = 4 K/W enabling sustained power dissipation when mounted on heatsinked PCB areas.

Key Specifications

Pinout & Package

Package: PG-TO252-3 (DPAK), thermally enhanced with exposed GND heat slug soldered to PCB copper pour for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73350PDBVR and TPS7B8750QKVURQ1, TLS850A4TEV50ATMA1 uniquely balances ultra-low IQ (4.3 µA), cranking capability (3.7 V min), and automotive qualification in a thermally efficient TO252-3 package - making it optimal for cost-constrained, high-reliability battery-permanent applications without added complexity.

Availability

TLS850A4TEV50ATMA1 is available at Aetrix Electronics and suitable for automotive body electronics, ADAS camera modules, telematics control units, and electric power steering sensor interfaces requiring stable component supply across long production lifecycles.

Supply support for TLS850A4TEV50ATMA1 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 manufacturing and automotive qualification infrastructure.

This device belongs to the OPTIREG™ linear regulator product line, engineered specifically for ultra-low-power, high-reliability automotive power rails where battery longevity and cranking resilience are mandatory design constraints.

FAQ

What is the minimum input voltage required for regulation during cranking?

The TLS850A4TEV50ATMA1 maintains 5 V regulation down to 3.7 V input - verified per ISO 16750-2 cranking profiles. At 3.7 V input, output remains within ±2% tolerance up to 100 mA load. Below 3.7 V, output drops linearly with input, enabling graceful shutdown rather than abrupt failure.

Can this regulator operate without an output capacitor?

No. A minimum 4.7 µF ceramic capacitor with ESR ≤40 Ω is mandatory for loop stability and transient response. Omitting it causes oscillation and potential damage. The datasheet explicitly prohibits operation without this capacitor - unlike some regulators supporting "capacitor-less" modes.

Is the heat slug electrically connected, and how must it be handled on the PCB?

Yes, the exposed heat slug is internally connected to Pin 2 (GND). It must be soldered to a dedicated GND copper pour with ≥6 thermal vias (0.3 mm diameter) connecting to inner-layer GND planes. Failure to do so raises junction temperature by >40 °C at 300 mA, risking thermal shutdown.

Does this part support reverse-polarity protection externally?

No internal reverse-polarity protection exists. The datasheet recommends adding an external Schottky diode (e.g., SS34) between battery and Pin 1 (I) to prevent damage from –13.5 V reverse battery connection. Without it, absolute maximum rating of –0.3 V on I pin will be violated, causing immediate failure.