Infineon Technologies IFX25001TFV33ATMA1

Overview

IFX25001TFV33ATMA1 from Infineon Technologies is a 3.3 V fixed-output, low-dropout linear voltage regulator in PG-TO252-3 (D-Pak) package, delivering up to 400 mA output current with dropout voltage as low as 700 mV at 300 mA, wide 4.7–40 V input range, and integrated reverse polarity protection, overtemperature shutdown, and current limiting. It serves as a primary power supply for microcontroller I/O rails in industrial HMI panels.

For engineers reviewing the IFX25001TFV33ATMA1 datasheet, IFX25001TFV33ATMA1 pinout, IFX25001TFV33ATMA1 application, or IFX25001TFV33ATMA1 equivalent, key selection criteria include guaranteed 3.3 V ±3.4% output accuracy across load (5–300 mA) and temperature (−40 °C to +125 °C), thermal resistance of 27 K/W (junction-to-ambient, natural convection), and minimum 22 µF/≤3 Ω ESR output capacitance requirement for stability.

Technical Context

The IFX25001TFV33ATMA1 implements a bandgap-referenced control amplifier driving a pass transistor with saturation control, enabling stable regulation under varying line and load conditions. Its protection circuitry includes dedicated thermal sensing with shutdown threshold between 151 °C and 200 °C and foldback current limiting triggered at 400–1100 mA.

Designed for unregulated DC inputs-such as automotive battery-derived supplies or rectified AC rails-the device operates with input voltages from 4.7 V to 40 V while maintaining 3.3 V output. Its 100 µA quiescent current at light load and 30 mA at full 400 mA load supports both standby efficiency and sustained power delivery.

Key Specifications

Pinout & Package

IFX25001TFV33ATMA1 uses the PG-TO252-3 (D-Pak) package with exposed heat slug electrically connected to GND. Thermal performance relies on soldering the heat slug to a PCB copper pour or external heatsink.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLE4275G and MCP1703T-3302E/MB, IFX25001TFV33ATMA1 uniquely combines 3.3 V output, reverse polarity tolerance, and 700 mV dropout in TO252-making it optimal for cost-sensitive, protection-critical 12 V-fed embedded controllers without external protection components.

Availability

IFX25001TFV33ATMA1 is available at Aetrix Electronics and suitable for industrial HMI panels, network router power rails, and home appliance control boards requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.

Supply support for IFX25001TFV33ATMA1 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 AG is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949 and ISO 14001.

The IFX25001 series belongs to Infineon's standard power linear regulator product line, engineered for robustness in harsh environments-including reverse polarity, thermal overload, and wide-input-voltage industrial power systems.

FAQ

What is the minimum input voltage required for stable 3.3 V output at 300 mA?

The IFX25001TFV33ATMA1 requires a minimum input voltage of 4.0 V to maintain regulation at 300 mA load, based on its typical 700 mV dropout voltage (VI = VQ + V_dr). The functional input range starts at 4.7 V per datasheet specification, ensuring margin for line transient suppression and PCB trace losses.

Can this regulator be used without an external heatsink in a sealed enclosure?

Yes, at ≤250 mA continuous load and ambient temperatures ≤50 °C, the PG-TO252-3 package achieves thermal equilibrium with R_thJA = 27 K/W on a standard 2-layer FR4 board. Above 250 mA or in enclosures exceeding 50 °C ambient, a ≥300 mm² copper pour or external heatsink is required to prevent junction temperature exceedance of 125 °C.

Does the device require a specific type of output capacitor?

Yes-the IFX25001TFV33ATMA1 mandates a minimum 22 µF output capacitor with ESR ≤3 Ω at 10 kHz. Ceramic capacitors meeting these specs (e.g., X5R/X7R 22 µF, 10 V) are recommended; tantalum or aluminum electrolytics may be used only if their ESR falls within the specified limit and lifetime ratings match the application's thermal profile.

How does the overtemperature shutdown behave during repeated fault events?

The overtemperature shutdown activates at 151–200 °C junction temperature and latches off until junction cools by ≥20 °C hysteresis. Repeated short-duration faults (e.g., <1 s) will not cause cumulative thermal stress due to the fast response of the internal thermal sensor and the hysteresis design, but continuous operation above 125 °C degrades long-term reliability and is outside the specified functional range.