Infineon Technologies TLS850B0TBV50ATMA1

Overview

TLS850B0TBV50ATMA1 from Infineon Technologies is a high-performance automotive-grade low-dropout linear voltage regulator in PG-TO263-5 package, delivering fixed 5 V output at up to 500 mA with ≤±2% accuracy, 100 mV typical dropout at 100 mA, and 20 µA quiescent current - enabling reliable operation during battery cranking in permanently connected vehicle systems.

For engineers reviewing the TLS850B0TBV50ATMA1 datasheet, TLS850B0TBV50ATMA1 pinout, TLS850B0TBV50ATMA1 application, or TLS850B0TBV50ATMA1 equivalent, key selection criteria include input voltage range (3–40 V), enable-controlled power sequencing, thermal shutdown behavior, ceramic capacitor stability (1 µF min), and AEC-Q100 qualification for under-hood deployment.

Technical Context

This LDO employs an integrated bandgap reference and fast-loop regulation architecture optimized for transient response and stability with low-ESR ceramic capacitors. Its extended 3.0 V minimum input enables functionality below nominal battery voltage - critical for cold-crank scenarios where system voltage dips to ~3.5 V.

Internal protection includes current limiting (prevents damage during output short-to-GND) and overtemperature shutdown (activates at T_j ≥ 150 °C). The EN pin features an integrated pull-down resistor, allowing direct microcontroller GPIO control without external biasing.

Key Specifications

Pinout & Package

Package: PG-TO263-5 (D²PAK) with exposed thermal pad (heat slug) requiring PCB copper area connection for thermal management. Pin 4 is not connected (n.c.) and may be left floating or tied to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73350PDBVR and TPS7B8750QKVURQ1, TLS850B0TBV50ATMA1 delivers superior cranking resilience (3.0 V start-up), tighter output accuracy (±2%), and lower quiescent current - making it optimal for AEC-Q100-compliant, always-on automotive subsystems where thermal and voltage-margin constraints dominate.

Availability

TLS850B0TBV50ATMA1 is available at Aetrix Electronics and suitable for automotive body control modules, ADAS camera power supplies, and engine control unit auxiliary rails requiring stable component supply with AEC-Q100 compliance and long-term lifecycle support.

Supply support for TLS850B0TBV50ATMA1 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 quality certification aligned to ISO/TS 16949 and IATF 16949.

TLS850B0TBV50ATMA1 belongs to the OPTIREG™ linear family, engineered specifically for robust, low-quiescent-current voltage regulation in automotive battery-connected systems - prioritizing cranking survival, thermal resilience, and functional safety readiness.

FAQ

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

The TLS850B0TBV50ATMA1 maintains regulation down to 3.0 V input across its operating temperature range, even at 500 mA load. At 100 mA, dropout is typically 100 mV, meaning regulation holds as long as input remains ≥5.1 V; below that, output tracks input minus dropout until the 3.0 V extended range limit is reached.

Can the n.c. pin (Pin 4) be used for thermal relief or grounding?

No - Pin 4 is internally unconnected and serves no electrical function. It may be left floating or connected to GND solely for mechanical reinforcement or solder joint reliability; doing so does not improve thermal performance. Thermal management must be handled exclusively via the exposed heat slug (GND-connected thermal pad) per JEDEC JESD51-2/-5 guidelines.

Is an input capacitor mandatory, and what value is recommended?

Yes - an input capacitor is required for EMI suppression and transient immunity. Infineon recommends a 100 nF ceramic capacitor placed directly between Pin 1 (I) and Pin 3 (GND), as close as possible to the device. Larger bulk capacitance (e.g., 1–10 µF) may be added upstream if line impedance or long trace lengths introduce instability risks.

How does the enable function behave during power-up and brown-out conditions?

The EN pin has an internal pull-down resistor (~1 MΩ), ensuring default OFF state at power-up. When driven high (>2.0 V), the device enables with typical turn-on delay of 50 µs. During input brown-out (VI < 3.0 V), the regulator ceases regulation but remains enabled; EN retains its logic state, and the device resumes regulation immediately once VI rises above the dropout threshold plus 5 V.