Infineon Technologies TLS105B0MBHTSA1

Overview

TLS105B0MBHTSA1 from Infineon is a monolithic high-precision voltage tracking linear regulator in PG-SCT595-5 package, delivering 50 mA output with ±0.5% tracking accuracy over 2.0–20 V reference input range and 4–40 V input supply. It features 250 mV typical dropout at full load, 3 µA standby current, reverse polarity protection, short-circuit protection (to GND and battery), and AEC-Q100 qualification for automotive sensor supply.

For engineers reviewing the TLS105B0MBHTSA1 datasheet, TLS105B0MBHTSA1 pinout, TLS105B0MBHTSA1 application, or TLS105B0MBHTSA1 equivalent, key selection criteria include tracking accuracy under wide temperature (−40°C to +150°C), ceramic capacitor stability, low quiescent current in always-on systems, and fault resilience in harsh automotive environments.

Technical Context

The TLS105B0MBHTSA1 implements a PNP-based tracking architecture where the OUT pin replicates the voltage applied to EN/ADJ with minimal offset-enabling precision replication without external feedback resistors. Its enable/adjust input accepts 2.0–20 V reference signals, supporting both direct connection and resistor-divider configurations for sub-2.0 V tracking via scaling.

Protection circuitry includes integrated reverse-polarity tolerance (−16 V input), thermal shutdown (>150°C junction), and dual short-circuit detection (to GND and to battery). The device operates across −40°C to +150°C junction temperature and maintains regulation down to 4 V input, making it suitable for 12 V and 24 V automotive battery rails with transient headroom.

Key Specifications

Pinout & Package

PG-SCT595-5 is a thermally enhanced 5-pin surface-mount package with dual GND pins (2 and 5) internally connected and designed for PCB heatsink attachment. Pin pitch is 0.5 mm; body size is 2.9 mm × 1.6 mm × 0.6 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision automotive voltage tracking applications.

Compared with TLV70733PDPWR and TPS7B8133QDGNRQ1, TLS105B0MBHTSA1 uniquely combines adjustable tracking, ±0.5% accuracy, dual short-circuit protection, and reverse polarity tolerance-making it the only option qualified for precision off-board sensor supply in AEC-Q100 Grade 0 environments.

Availability

TLS105B0MBHTSA1 is available at Aetrix Electronics and suitable for automotive sensor supply, protected off-board load switching, and secondary ECU voltage rails requiring stable component supply across extended temperature and harsh electrical environments.

Supply support for TLS105B0MBHTSA1 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 industrial control solutions, with global manufacturing and automotive qualification infrastructure.

TLS105B0MBHTSA1 belongs to the OPTIREG™ linear regulator product line, engineered specifically for high-reliability automotive applications demanding precision voltage tracking, fault resilience, and AEC-Q100 Grade 0 operation in extreme thermal and electrical conditions.

FAQ

What is the minimum reference voltage required at the EN/ADJ pin for regulation?

The TLS105B0MBHTSA1 requires a minimum of 2.0 V at the EN/ADJ pin to maintain regulation. This is specified in the functional range (Table 3, P_3.2.2) and enables precise tracking down to 2.0 V output when used directly-or lower outputs via resistor dividers scaling the reference. Operation below 2.0 V disables regulation.

Can TLS105B0MBHTSA1 operate with input voltages below 4 V?

No. The functional input voltage range is strictly 4 V to 40 V (Table 3, P_3.2.1). While absolute maximum rating allows −16 V to +45 V, regulation is not guaranteed below 4 V. Below this threshold, the internal pass transistor cannot sustain control loop stability or specified tracking accuracy.

Is external compensation required for stability with ceramic output capacitors?

No. The TLS105B0MBHTSA1 is internally compensated for stability with 1 µF ceramic capacitors having ESR ≤ 3 Ω (per Table 3, P_3.2.3–P_3.2.4). No external compensation network is needed-unlike many older LDOs-reducing design complexity and board space.

How does the thermal shutdown behave during sustained overload?

When junction temperature exceeds 150°C, the device shuts down the pass transistor. After cooling below the hysteresis threshold (~140°C), it automatically restarts. If the overload persists, this causes oscillatory output-intended as a fail-safe, not continuous operation. PCB heatsinking (e.g., 600 mm² copper) reduces R_thJA to 109 K/W to mitigate cycling.