Infineon Technologies TLS850D0TEV50ATMA1

Overview

TLS850D0TEV50ATMA1 from Infineon Technologies is a fixed-output 5 V, 500 mA automotive-grade low-dropout linear voltage regulator in PG-TO252-5 package, featuring 70 mV typical dropout at 100 mA, ±2 % output voltage accuracy, and integrated enable, reset, overtemperature shutdown, and current limiting. It operates from 3.0 V to 40 V input and supports cranking conditions in engine control units.

For engineers reviewing the TLS850D0TEV50ATMA1 datasheet, TLS850D0TEV50ATMA1 pinout, TLS850D0TEV50ATMA1 application, or TLS850D0TEV50ATMA1 equivalent, key selection criteria include ultra-low quiescent current (40 µA), ceramic-capacitor stability (1 µF), delayed power-on reset (16.5 ms), and AEC-Q100 qualification for under-hood deployment.

Technical Context

The device implements a bandgap-referenced regulation loop with fast transient response and inherent stability using only a 1 µF ceramic output capacitor. Its internal architecture integrates an open-collector reset output (RO) with built-in pull-up to Q, an enable input with internal pull-down, and thermal shutdown triggered at junction temperatures exceeding 150 °C.

Functional operation spans an extended input range (3.0–40 V), enabling continuous operation during automotive battery cranking (≥3 V). Output voltage remains regulated down to VI = VQ,nom + Vdr; below that threshold, output follows input minus dropout until cutoff.

Key Specifications

Pinout & Package

Package: PG-TO252-5 (DPAK-5), thermally enhanced with exposed heat slug connected to GND for PCB heatsinking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73350PDBVR and TPS7B8750QKVURQ1, TLS850D0TEV50ATMA1 uniquely combines cranking-range operation (3.0 V min), AEC-Q100 Grade 0, and deterministic 16.5 ms reset delay-making it optimal for cost-sensitive, thermally constrained automotive ECU designs requiring minimal external components.

Availability

TLS850D0TEV50ATMA1 is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS domain controllers requiring stable component supply across automotive production lifecycles.

Supply support for TLS850D0TEV50ATMA1 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 security solutions, with global manufacturing and automotive qualification infrastructure.

TLS850D0TE belongs to Infineon's automotive LDO portfolio designed specifically for battery-connected, always-on vehicle subsystems requiring high reliability, low quiescent current, and integrated supervision functions.

FAQ

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

The TLS850D0TEV50ATMA1 maintains regulation down to 3.0 V input across its entire operating temperature range, enabled by its extended functional range specification. At 500 mA load, regulation holds as long as input exceeds 5.07 V (5.0 V + 70 mV dropout), but the device remains functional-though unregulated-down to 3.0 V, supporting critical cranking scenarios where battery voltage dips transiently.

Can the reset output (RO) be used without external pull-up?

Yes. The RO pin has an internal pull-up resistor to the Q (output) rail, eliminating the need for an external pull-up. When the device is enabled and output voltage is valid, RO remains high-impedance (open-drain high). It pulls low during undervoltage or during the 16.5 ms power-on delay, providing a ready-to-use reset signal for MCUs without additional components.

Is a heatsink required for 500 mA continuous operation?

Not necessarily - the PG-TO252-5 package includes an exposed heat slug electrically and thermally connected to GND. With ≥200 mm² of 2-oz copper on the GND plane beneath the slug and minimal ambient temperature rise, the device sustains 500 mA at +85 °C ambient without external heatsink. Thermal derating applies above +100 °C ambient or with limited PCB copper area.

Does this part support reverse polarity protection?

No. The TLS850D0TEV50ATMA1 does not integrate reverse polarity protection. External protection - such as a series Schottky diode or MOSFET-based ideal diode circuit - must be added if the application risks reverse battery connection, as specified in Section 6.4 of the datasheet.