Infineon Technologies TLF1963TEATMA1

Overview

TLF1963TEATMA1 from Infineon is a low-dropout linear voltage regulator designed as an adjustable post-regulator for automotive power rails. It delivers up to 1.5 A output current with a typical dropout voltage of 340 mV at 1.5 A, ±1.5% output voltage tolerance at light loads, and low noise of 40 µVRMS (10 Hz–100 kHz). It operates from 2.5 V to 20 V input and supports output voltages from 1.21 V to VI − Vdr, enabling flexible rail generation in ADAS domain controllers.

For engineers reviewing the TLF1963TEATMA1 datasheet, TLF1963TEATMA1 pinout, TLF1963TEATMA1 application, or TLF1963TEATMA1 equivalent, key selection criteria include its AEC-Q100 qualification, reverse polarity protection, enable-controlled sequencing, ceramic-capacitor compatibility, and thermal shutdown behavior across −40°C to +150°C junction temperature.

Technical Context

The TLF1963TEATMA1 integrates an error amplifier, precision 1.21 V reference, saturation control for low-V_DS pass transistor operation, and protection circuitry including overtemperature shutdown and current limiting. Its adjustable topology uses external resistive feedback from Q to ADJ to set output voltage, with internal biasing ensuring stability down to 10 µF ceramic output capacitance.

Input voltage range starts at 1.7 V minimum (at light load), extending functionality into low-voltage subsystems. The PG-TO252-5 package features an exposed thermal pad tied to GND, enabling efficient heat dissipation with R_thJC = 0.78 K/W and R_thJA = 24 K/W on standard 2-layer FR4.

Key Specifications

Pinout & Package

TLF1963TEATMA1 is housed in a PG-TO252-5 surface-mount package with exposed thermal pad (GND-connected) for enhanced thermal performance. Pin 1 is EN, Pin 2 is IN, Pin 3 is GND, Pin 4 is Q (output), and Pin 5 is ADJ. The package complies with RoHS and is optimized for automotive PCB layouts requiring high reliability and thermal robustness.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout post-regulator applications.

Compared with TLF1963TEATMA1, TLE42754G offers lower cost for fixed 5 V use but forfeits adjustability and noise performance, while TLF1963AQV50 trades external feedback complexity for reduced component count-both retain full automotive qualification and thermal robustness.

Availability

TLF1963TEATMA1 is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, camera modules, and infotainment head units requiring stable component supply, AEC-Q100 compliance, and extended temperature operation.

Supply support for TLF1963TEATMA1 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 quality certification aligned to ISO/TS 16949.

The OPTIREG™ linear product line delivers AEC-Q100-qualified LDOs and DC/DC converters engineered specifically for automotive power integrity, emphasizing low noise, thermal resilience, and fault protection in safety-critical ECUs.

FAQ

What is the minimum input voltage required for 1.5 A output at 3.3 V?

The datasheet specifies a minimum input voltage of 2.1 V at 1.5 A load (P_5.1.2). For a 3.3 V output, the required input is at least 3.3 V + V_dr, where V_dr = 0.45 V max at 1.5 A → minimum VI = 3.75 V. This ensures regulation remains within dropout margin across temperature and process variation.

Can TLF1963TEATMA1 operate with zero-load current?

Yes - the device functions down to zero output current. Quiescent current is 1.0–1.5 mA (P_5.1.16) with no load, and the EN pin can reduce it to <1.5 µA in shutdown mode. Output voltage remains regulated and stable even at I_Q = 0 mA, provided C_Q ≥10 µF and ESR ≤3 Ω.

Is external compensation required for stability?

No external compensation is required. Stability is guaranteed with a minimum 10 µF ceramic output capacitor (X7R/X5R) having ESR ≤3 Ω at 10 kHz (P_4.2.2–P_4.2.3). The internal compensation network is optimized for this capacitor range, eliminating need for series RC networks or feedforward caps.

How does reverse polarity protection function in practice?

When IN is driven negative relative to GND (e.g., −20 V), internal protection diodes block conduction, limiting reverse current to <1 µA and preventing damage to the pass transistor or reference circuitry. This withstands battery terminal reversal during service or jump-start scenarios without external diodes.