Infineon Technologies TLS820F0ELV50XUMA1

Overview

TLS820F0ELV50XUMA1 from Infineon Technologies is an AEC-Q100 qualified automotive-grade low-dropout linear voltage regulator delivering a fixed 5.0 V output at up to 200 mA, with ±2 % output voltage accuracy, 70 mV typical dropout at 100 mA, and 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 current-dependent watchdog (16/32/48/96 ms) - designed for permanent battery-connected ECUs in engine control, body electronics, and ADAS power domains.

For engineers reviewing the TLS820F0ELV50XUMA1 datasheet, TLS820F0ELV50XUMA1 pinout, TLS820F0ELV50XUMA1 application, or TLS820F0ELV50XUMA1 equivalent, key selection criteria include its wide 3.0–40 V input range, ceramic-capacitor stability (1 µF), cranking-mode operation (≥3 V start-up), integrated protection (overtemperature shutdown, current limiting), and PG-SSOP-14 thermal performance with exposed pad.

Technical Context

The TLS820F0ELV50XUMA1 implements a high-stability regulation loop optimized for low-ESR ceramic capacitors, enabling fast transient response while maintaining phase margin >60° with only 1 µF output capacitance. Its bandgap reference and error amplifier architecture support ≤2 % output tolerance over temperature (-40 °C to +150 °C) and line/load variations.

Integrated system supervision includes an open-collector reset output (RO) with undervoltage detection and programmable delay, plus a watchdog input (WI) that deactivates when quiescent current exceeds 5.5 mA - enabling microcontroller health monitoring without external timing components. All protection functions (thermal shutdown, current limit) are fully self-contained and non-latching.

Key Specifications

Pinout & Package

Package: PG-SSOP-14 (Plastic Small Outline Package) with exposed thermal pad - designed for enhanced heat dissipation in compact automotive PCB layouts; pad must be connected to GND or heatsink for thermal compliance per R_thJA = 100 K/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV70750PDBVR and TPS7B8750QKVURQ1, TLS820F0ELV50XUMA1 uniquely combines 40 V operation, integrated watchdog + reset + enable, and PG-SSOP-14 thermal performance - reducing total component count and validation effort for AEC-Q100-compliant ECUs.

Availability

TLS820F0ELV50XUMA1 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS domain controllers, and infotainment systems requiring stable component supply across automotive production lifecycles.

Supply support for TLS820F0ELV50XUMA1 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 AEC-Q100 qualification infrastructure.

The TLS820F0 product line targets automotive power-supply integration - delivering highly reliable, functionally safe LDOs with embedded supervision for next-generation ECU architectures.

FAQ

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

The TLS820F0ELV50XUMA1 maintains regulation down to 3.0 V input across its full operating temperature range (-40 °C to +150 °C). At 200 mA load and 25 °C, the minimum input is 5.07 V (5.0 V + 70 mV dropout). However, its extended functional range allows operation as low as 3.0 V at reduced load - critical for engine cranking scenarios where battery voltage drops below 6 V.

How is the watchdog timeout configured, and what triggers its activation?

Watchdog timeout is set using DT1 and DT2 pins: grounding DT1 selects 16 ms, grounding DT2 adds 16 ms increments (32/48/96 ms). Activation occurs automatically when quiescent current exceeds 5.5 mA - indicating normal MCU operation - and deactivation happens if IQ falls below this threshold, signaling potential firmware hang or clock failure.

Can the reset threshold be adjusted below 2.50 V, and what is the recommended divider design?

No - the adjustable reset threshold has a hard lower limit of 2.50 V per datasheet specification. To configure it, connect RADJ to a resistor divider between Q (5 V) and GND; the voltage at RADJ sets the reset point. For example, a 10 kΩ top resistor and 5.1 kΩ bottom resistor yields ~3.36 V reset threshold, verified in functional testing.

Is the exposed thermal pad electrically isolated, and how must it be connected?

The exposed pad is internally connected to GND and must be soldered to a PCB copper pour tied to the main GND plane. It is not electrically isolated. Proper thermal vias (≥4 × 0.3 mm) to inner-layer GND planes are required to achieve the specified R_thJA of 100 K/W; floating or unconnected pads cause thermal derating and potential shutdown under load.