Infineon Technologies TLS202B1MBV33HTMA1

Overview

TLS202B1MBV33 from Infineon is a fixed-output 3.3 V linear post-regulator IC for automotive load currents up to 150 mA, featuring ±3% output accuracy, 290 mV typical dropout at full load, and AEC-Q100 qualification for under-hood applications such as body control modules and ADAS sensor power rails.

For engineers reviewing the TLS202B1MBV33 datasheet, TLS202B1MBV33 pinout, TLS202B1MBV33 application, or TLS202B1MBV33 equivalent, this page delivers verified electrical specs, thermal behavior in PG-SCT595, enable-controlled low-power sequencing, and automotive-grade protection features including short-circuit and overtemperature shutdown.

Technical Context

The TLS202B1MBV33 implements a bandgap-referenced feedback loop with internal current limiting and thermal shutdown circuitry. Its pass transistor is controlled via an error amplifier comparing a resistive divider output (fixed internally) against a stable reference, enabling regulation across 2.7–18 V input while maintaining 3.3 V ±3% output.

Enable functionality provides active-high logic control with <0.01 µA shutdown current; dual GND pins (2 & 5) are internally tied and thermally coupled to PCB heatsink areas. Stability requires 1 µF output capacitance with ≤10 Ω ESR at 10 kHz, validated across –40°C to +150°C junction temperature range.

Key Specifications

Pinout & Package

Package: PG-SCT595-5 - 5-pin surface-mount package with exposed thermal pad; dual GND pins (2 & 5) must be soldered to PCB heatsink area for thermal compliance (R_thJA = 103 K/W with 600 mm² copper).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output linear regulator applications.

Compared with TLV73333PDBVR and TPS7B8133QDCYRQ1, TLS202B1MBV33 uniquely combines AEC-Q100 Grade 0 qualification, dual-GND thermal optimization for engine-bay mounting, and integrated short-circuit/overtemperature protection-making it optimal for high-reliability under-hood post-regulation where ambient exceeds 125°C.

Availability

TLS202B1MBV33 is available at Aetrix Electronics and suitable for automotive body electronics, ADAS sensor power supplies, radar biasing, and telematics wake-up circuits requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle support.

Supply support for TLS202B1MBV33 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.

The OPTIREG™ linear family delivers automotive-grade LDOs optimized for post-regulation in harsh environments-designed specifically for noise-sensitive subsystems downstream of switching regulators in vehicles.

FAQ

What is the minimum input voltage required for regulation at full 150 mA load?

The TLS202B1MBV33 requires a minimum input voltage of 3.59 V (3.3 V + 290 mV dropout) to maintain regulation at 150 mA. Below this, output voltage drops linearly with input; operation is guaranteed from 2.7 V input only at reduced load currents per the dropout vs. load curve in Figure 12 of the datasheet.

Can the EN pin be left floating, or must it be actively driven?

The EN pin must not be left floating: it has no internal pull-up or pull-down. To ensure reliable startup, connect EN directly to the input (I) pin if enable control is unused; otherwise, drive it with a clean logic signal referenced to GND. Floating EN may cause erratic enable/disable behavior due to noise coupling.

Is an input capacitor required, and what value is recommended?

Yes-an input capacitor is recommended to suppress line transients and improve PSRR. Infineon specifies a 220 nF ceramic capacitor placed as close as possible to Pin 1 (I), with low-ESR characteristics. Larger values (e.g., 1 µF) may be added in parallel for enhanced low-frequency filtering, but 220 nF is the minimum for stability per Section 2.2 of the datasheet.

How does the overtemperature shutdown behave during continuous short-circuit fault?

Under continuous short-circuit, the device enters thermal shutdown at ~165°C junction temperature, disabling the pass transistor. After cooling below ~145°C hysteresis, it automatically restarts-causing oscillatory output until the fault clears. This cycle protects against destruction but is not intended for continuous operation; system design must limit fault duration or add external current limiting.