Infineon Technologies TLS205B0LDV33XUMA1

Overview

TLS205B0LDV33XUMA1 from Infineon Technologies is a fixed-output, 3.3 V, 500 mA low-dropout linear voltage regulator in PG-DSO-8 exposed-pad package, featuring 24 µVRMS output noise (10 Hz–100 kHz), 320 mV dropout at full load, and AEC-Q100 qualification for automotive post-regulation applications such as ADAS domain controllers and infotainment power rails.

For engineers reviewing the TLS205B0LDV33XUMA1 datasheet, TLS205B0LDV33XUMA1 pinout, TLS205B0LDV33XUMA1 application, or TLS205B0LDV33XUMA1 equivalent, key selection criteria include low-noise performance with bypass capacitor support, reverse polarity protection, shutdown current < 1 µA, and stability with ≥3.3 µF ceramic output capacitors without ESR requirements.

Technical Context

The TLS205B0LDV33XUMA1 implements a precision bandgap reference, error amplifier, and saturation-controlled pass transistor to deliver stable 3.3 V output across -40°C to +125°C junction temperature. Its internal Kelvin-sense architecture (SENSE pin tied to Q in fixed version) enables accurate regulation despite PCB trace resistance between regulator and load.

Protection circuitry includes thermal shutdown, foldback current limiting, reverse-battery blocking (no external diode needed), and zero reverse current flow during input reversal. The BYP pin supports optional 10 nF capacitor connection to reduce reference noise, directly lowering integrated output noise to 24 µVRMS.

Key Specifications

Pinout & Package

PG-DSO-8 exposed-pad package with thermal pad (Pin 9) requiring solder connection to PCB ground plane for R_thJA = 52 K/W (600 mm² heatsink). Pin 3 and Pin 7 are NC (no internal connection); Pin 2 is SENSE (internally connected to Q in fixed variant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLD5098EL and TLV73333PDBVR, TLS205B0LDV33XUMA1 uniquely combines AEC-Q100 Grade 1 qualification, 24 µVRMS noise, reverse-battery hardening, and 3.8 V minimum input - making it the only option for noise-sensitive, safety-compliant automotive post-regulation where cold-crank resilience and load regulation accuracy are mandatory.

Availability

TLS205B0LDV33XUMA1 is available at Aetrix Electronics and suitable for ADAS camera modules, automotive infotainment systems, and body control units requiring stable component supply with full automotive qualification and long-term lifecycle support.

Supply support for TLS205B0LDV33XUMA1 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.

TLS205B0LDV33XUMA1 belongs to the OPTIREG™ linear voltage regulator product line, designed specifically for demanding automotive power rails requiring low noise, high reliability, and comprehensive fault protection under harsh environmental conditions.

FAQ

Can TLS205B0LDV33XUMA1 operate with input voltage below 3.3 V?

No. The device requires a minimum input voltage of 3.8 V to maintain 3.3 V output regulation at full 500 mA load due to its 320 mV dropout specification. Operation below 3.8 V results in dropout mode where output voltage tracks input minus dropout, violating regulation. This limit is verified per Table 3 Functional Range in the datasheet.

Is an input capacitor required for TLS205B0LDV33XUMA1?

Yes - an input capacitor (1–10 µF ceramic) is required if the regulator is placed >15 cm from the main filter capacitor or if input trace inductance is non-negligible, as stated in Pin Function description for Pin 8 (I). It suppresses high-frequency noise and stabilizes input impedance, especially critical in battery-powered automotive systems where source impedance rises with frequency.

What is the purpose of the exposed thermal pad (Pin 9)?

The exposed pad (Pin 9) is electrically connected to GND and serves as the primary thermal path from die to PCB. Per datasheet Section 3.3, soldering it to a ≥600 mm² copper pour reduces R_thJA from 155 K/W to 52 K/W, enabling 500 mA operation at 125°C ambient. Leaving it unconnected risks thermal shutdown above 150 mW dissipation.

Does TLS205B0LDV33XUMA1 support remote sensing?

Yes - the SENSE pin (Pin 2) provides Kelvin sensing capability. When routed directly to the load instead of tying to Q, it compensates for voltage drop across PCB traces, improving load regulation accuracy to ±0.5% even with 100 mΩ series resistance. This function is explicitly defined in Table 1 Pin Definitions and validated in Application Note section 5.2.