Infineon Technologies TLS850F3TUV33ATMA1

Overview

TLS850F3TUV33 from Infineon Technologies is a high-performance automotive-grade LDO voltage regulator with integrated watchdog and reset supervision, delivering 3.3 V ±2% output at up to 500 mA across 3 V–42 V input range, featuring 26 µA quiescent current, 300 mV dropout at 250 mA, and AEC-Q100 qualification for permanent battery-connected systems.

For engineers reviewing the TLS850F3TUV33 datasheet, TLS850F3TUV33 pinout, TLS850F3TUV33 application, or TLS850F3TUV33 equivalent, this device supports cranking-condition operation, programmable reset delay, shared capacitor timing for watchdog and reset, and thermal/overcurrent protection in PG-TO252-7 packaging.

Technical Context

The TLS850F3TUV33 integrates a low-noise linear regulator core with dual supervisory functions: a voltage-monitoring reset circuit (with undervoltage detection and power-on delay) and an adjustable watchdog timer-both timed by a single external capacitor on the D pin. Its loop design ensures stability with only 1 µF ceramic output capacitance while maintaining fast transient response.

It operates across -40°C to +150°C junction temperature, supports extended 3 V–42 V input range for cold-cranking resilience, and includes internal protections: current limiting, overtemperature shutdown, reverse-polarity robustness, and HBM/CDM ESD tolerance per AEC-Q100.

Key Specifications

Pinout & Package

Package: PG-TO252-7 (exposed pad thermally connected to GND), surface-mount, automotive-qualified outline with integrated heatsink capability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO-with-supervision applications.

Compared with TLV70733PDRVR and MAX16910ATP+, TLS850F3TUV33 uniquely combines 500 mA drive, AEC-Q100 Grade 0 qualification, cranking-range operation (3 V), and single-capacitor programmable supervision-making it optimal for production automotive ECUs demanding functional safety and thermal resilience.

Availability

TLS850F3TUV33 is available at Aetrix Electronics and suitable for automotive general ECUs, ADAS camera power supplies, and telematics control units requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for TLS850F3TUV33 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.

TLS850F3TUV33 belongs to the OPTIREG™ linear family, designed specifically for automotive power supply systems requiring high reliability, wide input range, and integrated functional safety supervision.

FAQ

What is the minimum input voltage required for regulation?

The TLS850F3TUV33 maintains regulation down to 3 V input-enabling operation during engine cranking when battery voltage dips below 6 V. This extended operating range is verified per AEC-Q100 and specified in the functional range table (VI(ext) = 3 V–42 V). Below 3 V, the output follows the input but falls outside regulation tolerance.

How is the reset delay time set?

Reset delay is programmed by connecting an external capacitor between the D pin and GND. The delay time is proportional to capacitance value and is defined in the electrical characteristics table (e.g., 100 nF ≈ 10 ms, 1 µF ≈ 100 ms). No capacitor disables reset function entirely.

Can the watchdog and reset functions operate independently?

No-the watchdog and reset share the same external timing capacitor on the D pin, so their timing constants are inherently coupled. However, the watchdog can be disabled independently using the WINH pin (high = inhibit), while reset remains active. Both outputs share the RO/WO open-collector pin.

Is thermal derating required at high ambient temperatures?

Yes-junction temperature must remain ≤150°C. With R_thJA = 66 K/W (300 mm² heatsink), maximum continuous power dissipation at 85°C ambient is ~0.98 W. At full 500 mA output into 3.3 V load with 12 V input, power dissipation is ~4.35 W, requiring ≥600 mm² copper area or forced cooling per thermal simulation data.