Infineon Technologies IFX25001TFV50ATMA1

Overview

IFX25001TFV50ATMA1 from Infineon Technologies is a 5.0 V fixed-output, low-dropout linear voltage regulator in PG-TO252-3 package, delivering up to 400 mA output current with dropout voltage as low as 250 mV at 250 mA load, functional input range 5.5–40 V, and integrated reverse polarity protection, overtemperature shutdown, and current limiting. It targets industrial power rails in network routers and HDTV power supplies where stable 5 V bias is required under wide-input-voltage conditions.

For engineers reviewing the IFX25001TFV50ATMA1 datasheet, IFX25001TFV50ATMA1 pinout, IFX25001TFV50ATMA1 application, or IFX25001TFV50ATMA1 equivalent, key selection criteria include dropout performance at 250 mA, thermal resistance (R_thJA = 27 K/W on FR4 2s2p board), output stability with ≥22 µF/≤3 Ω ESR capacitor, and junction temperature operation up to 125 °C.

Technical Context

The IFX25001TFV50ATMA1 implements a bandgap-referenced control amplifier driving an internal pass transistor, with saturation control circuitry enabling low-dropout operation. Protection logic monitors junction temperature, output current, and input polarity-triggering shutdown or current foldback when thresholds are exceeded.

Its functional architecture supports continuous operation across -40 °C to +125 °C ambient, with specified line regulation (10–25 mV over 12–32 V input) and load regulation (20–50 mV from 5 mA to 400 mA), ensuring stable 5.0 V ±4% output under dynamic load and input transients typical in industrial DC-fed systems.

Key Specifications

Pinout & Package

IFX25001TFV50ATMA1 uses PG-TO252-3 (D-Pak) package with exposed thermal pad connected internally to GND. Pin 1: Input (VI); Pin 2: GND (internally tied to heat slug); Pin 3: Output (VQ). The heat slug must be soldered to a PCB copper pour for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLE4275G and MCP1703T-5002E/MB, IFX25001TFV50ATMA1 uniquely combines reverse polarity hardening, 400 mA capability, and 27 K/W thermal resistance in TO252-making it optimal for ruggedized 5 V rails where input fault tolerance and thermal headroom are design priorities.

Availability

IFX25001TFV50ATMA1 is available at Aetrix Electronics and suitable for network routers, HDTV power supplies, industrial PLC I/O modules, and smart appliance control boards requiring stable component supply with industrial temperature qualification and long-term lifecycle support.

Supply support for IFX25001TFV50ATMA1 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, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.

The IFX25001 belongs to Infineon's industrial-grade linear regulator product line, designed specifically for robust DC/DC conversion in harsh environments-including manufacturing automation, home appliances, and consumer electronics with extended temperature and transient requirements.

FAQ

What is the minimum input voltage required for regulation at full 400 mA load?

The IFX25001TFV50ATMA1 requires a minimum input voltage of 5.25 V to maintain 5.0 V output at 400 mA, based on its maximum dropout voltage of 500 mV (typ. 250 mV) at that load. Below this, output voltage drops linearly with input; the functional lower limit is 5.5 V per datasheet specifications.

Can this regulator operate without an output capacitor?

No. An output capacitor of at least 22 µF with ESR ≤3 Ω at 10 kHz is mandatory for stability across all load conditions. Omitting it causes oscillation and potential device failure. Ceramic or low-ESR tantalum types are recommended, placed within 5 mm of the Q pin.

Is the heat slug electrically isolated from other pins?

No. The exposed heat slug is internally connected to Pin 2 (GND) and must be soldered to a GND copper pour on the PCB. Using non-GND thermal pads or insulating layers degrades thermal performance and risks overheating due to increased R_thJC.

Does the overtemperature shutdown feature latch or auto-recover?

It auto-recovers. When junction temperature exceeds 151–200 °C, the regulator shuts down output and enters thermal shutdown mode. Once T_j falls below the hysteresis threshold (~140 °C), normal regulation resumes without requiring power cycle or external reset.