Infineon Technologies IFX7805ABTCATMA1

Overview

IFX7805ABTCATMA1 from Infineon Technologies is a fixed-output 5 V, 1.0 A positive linear voltage regulator in PG-TO-263-3 (D²PAK) package, featuring internal current limiting, thermal shutdown, and safe-area protection. It operates across -40 °C to +125 °C junction temperature, supports up to 35 V input, and delivers ±2% output voltage accuracy at 1 A load - used for local regulation in industrial power supplies and embedded control boards.

For engineers reviewing the IFX7805ABTCATMA1 datasheet, IFX7805ABTCATMA1 pinout, IFX7805ABTCATMA1 application, or IFX7805ABTCATMA1 equivalent, key selection criteria include dropout voltage (2 V @ 1 A), PSRR (68 dB @ 120 Hz), thermal resistance (R_thJA = 23 K/W with heatsink), short-circuit current limit (0.5–1.2 A), and RoHS-compliant thermally optimized packaging.

Technical Context

The IFX7805ABTCATMA1 implements a monolithic three-terminal architecture with an internal bandgap reference, error amplifier, and series pass transistor. Protection functions include foldback current limiting, SOA compensation, and thermal shutdown triggered above 150 °C junction temperature.

Its functional input range spans 7.5 V to 35 V, with line regulation of ≤10 mV over 7.5–20 V and load regulation of ≤15 mV across 5 mA–1 A. Output stability requires ≥100 nF ceramic capacitor at OUT and ≥0.33 µF at IN per datasheet layout guidance.

Key Specifications

Pinout & Package

IFX7805ABTCATMA1 uses the PG-TO-263-3 (D²PAK) package with exposed thermal pad soldered to PCB ground plane for enhanced heat dissipation. Pin 1 = IN, Pin 2 = GND (internally connected to thermal tab), Pin 3 = OUT.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM7805CDT/NOPB and STLD10050TR, IFX7805ABTCATMA1 uniquely combines 1 A continuous rating, integrated thermal shutdown, and 23 K/W R_thJA in D²PAK - enabling compact, self-protected 5 V regulation where reliability under sustained load matters.

Availability

IFX7805ABTCATMA1 is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostic devices, point-of-sale terminals, and automotive body control units requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for IFX7805ABTCATMA1 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 to ISO/TS 16949 and ISO 9001.

The IFX7805 belongs to Infineon's standard linear regulator product line, designed for robust local regulation in harsh-environment industrial and commercial systems - not qualified for automotive safety-critical applications.

FAQ

What is the minimum input voltage required for regulation at full 1 A load?

The IFX7805ABTCATMA1 requires a minimum input voltage of 7.5 V to maintain specified line regulation at 1 A output current, as defined in the functional range table. This accounts for the 2 V dropout voltage plus margin for internal reference and amplifier headroom. Operation below 7.5 V may cause output sag or instability.

Can this regulator be used without a heatsink in free-air convection?

No - at 1 A load with 35 V input, power dissipation exceeds 30 W, far exceeding the 23 K/W R_thJA limit for safe operation without heatsinking. Even at 12 V input (7 V drop × 1 A = 7 W), a minimum 300 mm² copper pour is required per JEDEC JESD51-3 data. Thermal simulation is recommended for board-specific layouts.

Does the GND pin require a dedicated PCB trace or can it share ground with other components?

The GND pin must connect directly to a low-impedance, wide copper plane tied to the thermal pad - not shared via narrow traces. It serves as both signal reference and primary thermal path; routing through vias or daisy-chained ground nets increases R_thJA and risks thermal runaway. Dedicated thermal land with ≥4 thermal vias to inner ground layers is strongly advised.

Is output capacitor ESR critical for stability with this regulator?

Yes - the IFX7805ABTCATMA1 requires a minimum 100 nF ceramic capacitor (low-ESR, X7R or better) at the output. High-ESR electrolytics or tantalums may cause oscillation due to phase shift in the feedback loop. The datasheet specifies ceramic-only for stability; adding bulk capacitance beyond 100 nF is acceptable if ceramic remains dominant in the 10 kHz–1 MHz range.