Infineon Technologies TLS205B0EJV33XUMA1

Overview

TLS205B0EJV33XUMA1 from Infineon Technologies is a fixed-output (3.3 V), 500 mA automotive-grade LDO voltage regulator in PG-DSO-8 exposed-pad package, featuring 24 µVRMS noise (10 Hz–100 kHz), 320 mV dropout at full load, and ±2.5% output accuracy over temperature and load. It serves as a low-noise post-regulator in battery-powered automotive ECUs requiring stable 3.3 V supply under wide input (3.8–20 V) and harsh thermal conditions.

For engineers reviewing the TLS205B0EJV33XUMA1 datasheet, TLS205B0EJV33XUMA1 pinout, TLS205B0EJV33XUMA1 application, or TLS205B0EJV33XUMA1 equivalent, key selection criteria include its AEC-Q100 qualification, reverse polarity protection, <1 µA shutdown current, Kelvin sense capability for load regulation, and stability with ≥3.3 µF ceramic output capacitors without ESR requirements.

Technical Context

The TLS205B0EJV33XUMA1 implements a micropower error amplifier with internal 1.22 V reference and saturation control to maintain regulation down to 2.3 V input for the adjustable variant-here configured as fixed 3.3 V output via internal resistor divider. Its architecture integrates reverse-battery protection, thermal shutdown, and foldback current limiting without external diodes.

It supports low-noise operation via external 10 nF BYP-to-Q capacitor, reducing output noise to 24 µVRMS; the SENSE pin enables Kelvin sensing for precise load-side regulation, while EN provides logic-compatible shutdown with <1 µA quiescent current in disable state.

Key Specifications

Pinout & Package

Package: PG-DSO-8 exposed-pad (RoHS-compliant, thermally enhanced); requires soldering of exposed pad (Pin 9) to PCB ground plane for thermal performance (R_thJA = 52 K/W with 600 mm² heatsink).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLD5098EL and TLV73333PDBVR, TLS205B0EJV33XUMA1 uniquely combines AEC-Q100 qualification, Kelvin sensing, reverse-battery robustness, and sub-25 µVRMS noise in a thermally optimized exposed-pad package-making it the only choice for safety-critical 3.3 V post-regulation in engine bay or ADAS domains.

Availability

TLS205B0EJV33XUMA1 is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, and body control modules requiring stable component supply with full AEC-Q100 compliance and long-term lifecycle support.

Supply support for TLS205B0EJV33XUMA1 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 manufacturing and automotive qualification infrastructure.

This device belongs to the OPTIREG™ linear regulator product line, designed specifically for demanding automotive power rails where low noise, reverse protection, and AEC-Q100 reliability are mandatory-not general-purpose or industrial LDOs.

FAQ

Can TLS205B0EJV33XUMA1 operate with input voltage below 3.3 V?

No. The fixed 3.3 V version requires minimum 3.8 V input to maintain regulation at full 500 mA load due to its 320 mV dropout voltage. Operation below 3.8 V results in pass transistor saturation and unregulated output. For sub-3.3 V input applications, consider buck-boost regulators instead.

Is an input capacitor mandatory for TLS205B0EJV33XUMA1?

Yes-an input capacitor (1–10 µF ceramic) is required if the device is placed >15 cm from the main filter capacitor or if input trace inductance is non-negligible. This prevents instability and voltage spikes during load transients, especially in battery-fed automotive systems where source impedance rises with frequency.

What happens if the SENSE pin is left unconnected on TLS205B0EJV33XUMA1?

If SENSE is left unconnected, the regulator loses feedback path integrity and may oscillate or fail to regulate. Per datasheet, SENSE must be connected directly to Q (output) in standard configurations. Leaving it floating violates functional range and risks output inaccuracy or instability under load variation.

Does TLS205B0EJV33XUMA1 require a minimum ESR for the output capacitor?

No. Unlike many LDOs, TLS205B0EJV33XUMA1 is stable with ceramic capacitors having zero ESR. The datasheet specifies stability with ≥3.3 µF capacitance and no ESR requirement-enabling use of low-ESR X7R/X5R types without series resistors, simplifying filtering and saving board space.