Infineon Technologies TLS203B0EJVXUMA1

Overview

TLS203B0EJVXUMA1 from Infineon is a fixed-output (3.3 V), 300 mA automotive-grade LDO linear voltage regulator in PG-DSO-8 exposed-pad package, featuring 270 mV dropout at full load, 24 µVRMS output noise (10 Hz–100 kHz), and ±2.5% output accuracy over temperature and load. It delivers stable post-regulation for battery-powered ADAS sensors and infotainment power domains.

For engineers reviewing the TLS203B0EJVXUMA1 datasheet, TLS203B0EJVXUMA1 pinout, TLS203B0EJVXUMA1 application, or TLS203B0EJVXUMA1 equivalent, key selection criteria include low-noise operation with bypass capacitor support, reverse polarity protection, AEC-Q100 qualification, and compatibility with ceramic output capacitors ≥3.3 µF.

Technical Context

The TLS203B0EJVXUMA1 integrates an internal 1.22 V reference, error amplifier, saturation control, and thermal/overcurrent protection circuitry. Its Kelvin-sense capability (via SENSE pin) enables precise regulation under PCB trace resistance, while the BYP pin accepts up to 10 nF capacitor to reduce reference noise and achieve 24 µVRMS output noise.

It operates across 3.8 V to 20 V input range with 30 µA quiescent current and shuts down to <1 µA. Internal reverse-battery protection blocks reverse current flow from output to input, eliminating need for external diodes - critical for 12 V automotive battery systems subject to jump-start or reverse-connection events.

Key Specifications

Pinout & Package

Package: PG-DSO-8 exposed-pad (RoHS-compliant, thermally enhanced). Exposed pad (Pin 9) must be soldered to PCB ground plane and electrically tied to Pin 6 (GND) for optimal thermal performance (R_thJA = 52 K/W with 600 mm² copper area).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise automotive LDO applications.

Compared with TLV73333PDBVR and TPS79933DRVR, TLS203B0EJVXUMA1 uniquely combines AEC-Q100 Grade 1 qualification, reverse polarity protection, 24 µVRMS noise, and 300 mA output - making it the only option qualified for demanding front-radar and telematics always-on rails.

Availability

TLS203B0EJVXUMA1 is available at Aetrix Electronics and suitable for ADAS camera power supplies, infotainment SoC core rails, and telematics control units requiring stable component supply, long-term automotive lifecycle support, and RoHS-compliant manufacturing.

Supply support for TLS203B0EJVXUMA1 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 ICs, and security solutions, with global R&D and wafer fabrication infrastructure.

The OPTIREG™ linear regulator product line targets automotive power systems requiring high reliability, low noise, and integrated protection - specifically engineered for post-regulation in battery-supplied ECUs and ADAS subsystems.

FAQ

Can TLS203B0EJVXUMA1 operate with input voltage below 3.8 V?

No. The functional input voltage range is strictly 3.8 V to 20 V for the fixed 3.3 V version (TLS203B0EJ V33). Operation below 3.8 V violates the minimum input specification and results in loss of regulation or dropout. This limit ensures sufficient headroom for the 270 mV dropout and internal circuit biasing.

Is the SENSE pin mandatory for all applications?

No. The SENSE pin is optional and used only when PCB trace resistance between Q and the load causes measurable voltage drop (>10 mV). In standard layouts, SENSE is shorted to Q. When used, it must be routed as a dedicated Kelvin pair to the load's power entry point - not shared with high-current paths.

What is the maximum allowable BYP capacitor value?

The datasheet specifies a maximum of 10 nF for the BYP capacitor to achieve the 24 µVRMS noise figure over 10 Hz–100 kHz. Larger values degrade phase margin and may cause instability. If noise reduction is not required, BYP must remain unconnected - no capacitor should be placed there.

Does TLS203B0EJVXUMA1 require an input capacitor?

An input capacitor is recommended but not always mandatory. It is required if the device is located >15 cm from the main filter capacitor or if input trace inductance is significant (e.g., long harness runs). For most PCB-mounted automotive applications, a 1–10 µF ceramic capacitor at the I pin improves transient response and reduces high-frequency noise coupling.