Infineon Technologies TLS125D0EJXUMA1

Overview

TLS125D0EJXUMA1 from Infineon is a monolithic high-precision linear voltage tracking regulator in PG-DSO-8 exposed pad package, delivering 250 mA output current with ±0.5% tracking accuracy, 250 mV typical dropout at full load, and operation across -16 V to 45 V input range. It serves as a protected off-board sensor supply in automotive powertrain systems, replicating an external reference voltage (2.0–14 V) at its output under harsh thermal and electrical conditions.

For engineers reviewing the TLS125D0EJXUMA1 datasheet, TLS125D0EJXUMA1 pinout, TLS125D0EJXUMA1 application, or TLS125D0EJXUMA1 equivalent, key selection criteria include tracking accuracy vs. reference voltage drift, dropout behavior under 250 mA load, PG open-drain fault signaling, reverse polarity protection, and AEC-Q100 qualification for under-hood deployment.

Technical Context

The TLS125D0EJXUMA1 implements a precision analog tracking architecture where the output voltage follows the ADJ pin reference with <±0.5% error over temperature and line/load variations. Its internal PMOS pass element enables low dropout (250 mV @ 250 mA) and reverse polarity protection without external components.

Protection functions are fully integrated: short-circuit protection to GND and battery, overtemperature shutdown, and undervoltage/overvoltage detection routed to the open-drain PG pin. The EN pin supports system-level enable control, while soft-start limits inrush current during turn-on.

Key Specifications

Pinout & Package

Package: PG-DSO-8 with exposed thermal pad (connected to GND), optimized for automotive thermal cycling and PCB heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS855D0EJXUMA1 and TLV71725PDQNR, TLS125D0EJXUMA1 uniquely combines adjustable tracking, reverse polarity immunity, PG fault signaling, and AEC-Q100 Grade 0 qualification-making it the sole option for robust, high-accuracy off-board sensor regulation in powertrain systems.

Availability

TLS125D0EJXUMA1 is available at Aetrix Electronics and suitable for automotive powertrain sensor supply, secondary ECU voltage rails, and protected off-board load switching requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle continuity.

Supply support for TLS125D0EJXUMA1 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.

TLS125D0EJXUMA1 belongs to the OPTIREG™ linear regulator product line, engineered specifically for high-reliability automotive voltage tracking applications-including engine control, transmission, and exhaust aftertreatment systems-where precision, protection, and thermal resilience are mandatory.

FAQ

What is the minimum reference voltage required at the ADJ pin?

The ADJ pin requires a minimum reference voltage of 2.0 V to ensure proper tracking operation across the full temperature and load range. This value is specified in the functional range table (Table 2, P_3.2.3) and verified down to -40°C junction temperature. Operation below 2.0 V may result in loss of regulation or increased tracking error beyond ±0.5%.

Can TLS125D0EJXUMA1 operate with input voltages below ground?

Yes-the device supports input voltages as low as -16 V relative to GND, enabling robust reverse battery protection without external components. This capability is validated per absolute maximum ratings (Table 1, P_3.1.1) and confirmed in automotive load-dump and jump-start test profiles per ISO 7637-2 and ISO 16750-2 standards.

Is an external capacitor required on the PG pin?

No external capacitor is required on the PG pin. It is an open-drain output designed to interface directly with an external pull-up resistor (typically 10 kΩ to 3.3 V or 5 V). Adding capacitance would delay fault reporting and violate the timing specifications defined in the electrical characteristics table (Section 4.13).

How is thermal performance affected by the exposed pad connection?

The exposed thermal pad must be soldered to a PCB copper pour connected to GND to achieve the specified thermal resistance (R_thJA = 60 K/W). Leaving the pad unconnected increases junction temperature by >35°C at 250 mA load, risking thermal shutdown. Layout guidelines in Section 6 mandate ≥4 thermal vias under the pad for optimal heat transfer.