Infineon Technologies TLS202B1MBV33HTSA1

Overview

TLS202B1MBV33 from Infineon Technologies is a fixed-output 3.3 V linear post-regulator IC for automotive applications, delivering up to 150 mA output current with ±3% voltage accuracy, 290 mV typical dropout, and AEC-Q100 qualification. It operates across 2.7–18 V input range, features enable control, and is designed for use downstream of DC-DC preregulators in body control modules.

For engineers reviewing the TLS202B1MBV33 datasheet, TLS202B1MBV33 pinout, TLS202B1MBV33 application, or TLS202B1MBV33 equivalent, key selection criteria include low shutdown current (0.01 µA), high PSRR (63 dB @ 10 kHz), thermal protection, and PG-SCT595 package compatibility with automotive PCB layout constraints.

Technical Context

The TLS202B1MBV33 implements a bandgap-referenced feedback loop controlling a pass transistor to maintain regulated 3.3 V output. Its internal current limitation and overtemperature shutdown circuits respond independently to short-circuit and thermal faults, causing oscillatory restart behavior until fault removal.

Stability requires an output capacitor CQ of ≥1 µF with ESR ≤10 Ω at 10 kHz, and an input capacitor CI is recommended for line transient suppression. The dual-GND pins (2 and 5) must both be soldered to a heatsink area to meet thermal resistance targets (R_thJA = 117 K/W with 300 mm² copper).

Key Specifications

Pinout & Package

Package: PG-SCT595-5 - thermally enhanced 5-pin surface-mount package with dual exposed GND pads (pins 2 and 5) requiring direct connection to PCB heatsink area for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLD5098EL and TLV73333PDBVR, TLS202B1MBV33 uniquely combines AEC-Q100 qualification, enable control, and ultra-low shutdown current - making it the only choice for automotive always-on domains where functional safety and battery preservation are co-dependent.

Availability

TLS202B1MBV33 is available at Aetrix Electronics and suitable for body control modules, telematics units, door electronics, and climate actuators requiring stable component supply under automotive qualification and thermal stress conditions.

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 AEC-Q100-qualified voltage regulators optimized for post-regulation in harsh automotive environments - specifically targeting low-quiescent-current, high-PSRR, and thermally robust operation downstream of DC-DC converters.

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 to maintain 3.3 V output at 150 mA, based on its 290 mV typical dropout voltage. Below this threshold, output voltage drops linearly with input; operation below 2.7 V is outside the functional range per datasheet Table 3.

Can the EN pin be left floating, or must it be pulled high/low?

The EN pin must not be left floating. It is CMOS-compatible and requires a defined logic level: connect to input (VI) for always-on operation, or drive actively high/low via microcontroller GPIO. Floating may cause unpredictable startup behavior or increased leakage due to undefined gate bias on the internal enable driver.

Is an input capacitor (CI) mandatory, or only recommended?

An input capacitor CI is recommended-not mandatory-for line transient suppression, but omission risks instability during fast input voltage changes (e.g., load dump). Infineon specifies a 220 nF ceramic capacitor placed adjacent to pin 1; absence may degrade PSRR and increase susceptibility to conducted EMI from upstream DC-DC stages.

How does the dual-GND configuration affect PCB layout requirements?

Both GND pins (2 and 5) must be connected to the same low-impedance thermal plane using wide copper pours and multiple thermal vias. Separating them or routing one to a different net violates the internal grounding scheme and degrades thermal performance-increasing junction temperature by up to 40°C and risking premature thermal shutdown under 150 mA load.