Infineon Technologies TLS820F1ELV50XUMA1

Overview

TLS820F1ELV50 from Infineon Technologies is an AEC-Q100 qualified automotive-grade low dropout linear voltage regulator in PG-SSOP-14 package, delivering a fixed 5 V output with ±2 % accuracy, 200 mA max output current, 70 mV typical dropout at 100 mA, and ultra-low 40 µA quiescent current. It integrates enable control, programmable delayed reset (8.5 ms / 16.5 ms), adjustable reset threshold (down to 2.50 V), and a flexible watchdog (16/32/48/96 ms) for microcontroller supervision in battery-connected automotive ECUs.

For engineers reviewing the TLS820F1ELV50 datasheet, TLS820F1ELV50 pinout, TLS820F1ELV50 application, or TLS820F1ELV50 equivalent, key selection criteria include input voltage range (3–40 V), ceramic-capacitor stability (1 µF), cranking-mode operation (3 V start-up), integrated protection (current limit, thermal shutdown), and dual timing configuration via DT1/DT2 pins.

Technical Context

The TLS820F1ELV50 implements a high-stability regulation loop optimized for low-ESR ceramic capacitors, enabling stable operation with only 1 µF output capacitance. Its architecture integrates bandgap reference, enable-controlled pass transistor, open-collector reset and watchdog outputs, and programmable delay logic via DT1/DT2 pins.

Reset functionality includes undervoltage detection with user-adjustable threshold (via RADJ), power-on delay selection (8.5 ms or 16.5 ms), and active-low open-collector RO output. Watchdog timing is configurable across four values (16/32/48/96 ms) using DT1 and DT2 logic states, while EN provides high-active enable with internal pull-down.

Key Specifications

Pinout & Package

Package: PG-SSOP-14 (exposed thermal pad), RoHS-compliant, AEC-Q100 qualified for automotive use.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive LDO regulator with integrated supervisor applications.

Compared with TLV70750PDP and MAX16910ATA+, TLS820F1ELV50 uniquely combines cranking-voltage operation (3 V start), ceramic-capacitor stability, and dual-pin programmable reset/watchdog timing - making it optimal for compact, self-contained automotive ECUs requiring minimal external components.

Availability

TLS820F1ELV50 is available at Aetrix Electronics and suitable for body control modules, engine control units, ADAS camera ECUs, and infotainment power sequencing requiring stable component supply, AEC-Q100 qualification, and long-term automotive lifecycle support.

Supply support for TLS820F1ELV50 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 expertise.

The TLS820F1ELV50 belongs to Infineon's TLE/TLS automotive LDO family, designed specifically for battery-connected vehicle systems requiring high reliability, cranking-mode operation, and integrated functional safety features like reset and watchdog.

FAQ

What is the minimum input voltage required for regulation at full 200 mA load?

The TLS820F1ELV50 maintains regulation down to 3.0 V input across its full operating temperature range (−40 °C to +125 °C junction). At 200 mA load, the required minimum input is 5.07 V (5 V output + 70 mV dropout), but the device remains functional and enters dropout only when VIN falls below VOUT + VDO - ensuring cranking-mode compatibility even below nominal battery voltage.

Can the reset threshold be set below 2.50 V?

No. The datasheet specifies 2.50 V as the absolute lower limit for adjustable reset threshold via the RADJ pin. This is enforced by internal reference design and validated across process/voltage/temperature corners. Attempting to configure below 2.50 V results in undefined reset behavior and is outside guaranteed operation.

Is the exposed thermal pad electrically isolated or connected internally?

The exposed pad is internally connected to GND (Pin 5) and must be soldered to a PCB copper pour tied to system ground. It serves both thermal dissipation and electrical grounding functions - floating or non-GND connections degrade thermal performance and may cause instability or premature thermal shutdown.

How does the watchdog respond if the WI pin is left unconnected?

WI has an internal pull-down resistor; an unconnected WI pin defaults to logic low. Since the watchdog requires periodic edge transitions (not level hold), absence of toggling causes timeout after the selected interval (e.g., 16 ms), asserting WO low. This failsafe behavior ensures microcontroller lockup detection even without explicit WI routing.