Infineon Technologies IFX25001MEV33HTSA2

Overview

IFX25001MEV33HTSA2 from Infineon Technologies is a 3.3 V, 400 mA low-dropout linear voltage regulator in PG-SOT223-4 package with 250 mV typical dropout at 250 mA, -40 °C to 125 °C operating junction temperature, and integrated reverse polarity protection, overtemperature shutdown, and current limiting. It powers microcontroller core rails in industrial HMI panels where input supply varies from 4.7 V to 40 V.

For engineers reviewing the IFX25001MEV33HTSA2 datasheet, IFX25001MEV33HTSA2 pinout, IFX25001MEV33HTSA2 application, or IFX25001MEV33HTSA2 equivalent, key selection criteria include dropout voltage at full load, thermal resistance in SOT223, output capacitor ESR limits (≤3 Ω), and functional input range compliance for 12 V/24 V industrial bus systems.

Technical Context

The IFX25001MEV33HTSA2 uses a bandgap reference and control amplifier to regulate output voltage with ±3.5% initial accuracy (3.17–3.44 V) across 5–300 mA load and 4.7–28 V input. Its saturation control circuit enables overtemperature shutdown at 151–200 °C and foldback current limiting that activates at 400–1100 mA.

Protection logic operates outside normal functional range: reverse polarity protection engages below -42 V input, and short-circuit survival relies on thermal shutdown rather than continuous current limiting. The device requires ≥22 µF output capacitance with ≤3 Ω ESR at 10 kHz for stability.

Key Specifications

Pinout & Package

PG-SOT223-4 package with exposed heat slug electrically connected to GND; requires soldered thermal pad for rated 400 mA performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLE42754G and MCP1703T-3302E/MB, IFX25001MEV33HTSA2 delivers higher current in SOT223 with lower dropout and industrial temperature qualification-making it optimal for 3.3 V, 400 mA industrial loads where thermal headroom and transient robustness are critical.

Availability

IFX25001MEV33HTSA2 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, HDTV power management, and network router control planes requiring stable component supply under extended temperature and transient conditions.

Supply support for IFX25001MEV33HTSA2 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 harsh-environment applications including factory automation, building controls, and white goods where input transients, reverse polarity, and extended temperature operation are routine.

FAQ

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

The IFX25001MEV33HTSA2 requires ≥4.7 V input for functional operation in the 3.3 V version. At 400 mA load, the dropout voltage is up to 1.2 V, so minimum input is 3.3 V + 1.2 V = 4.5 V. The 4.7 V specification includes margin for line regulation and PCB trace drops, ensuring stable output across temperature and manufacturing variation.

Can this LDO be used without an output capacitor?

No. The IFX25001MEV33HTSA2 requires a minimum 22 µF output capacitor with ESR ≤3 Ω at 10 kHz for loop stability. Omitting it causes oscillation and output voltage overshoot during load transients. Ceramic capacitors alone often have insufficient ESR; a parallel electrolytic or polymer capacitor may be needed to meet the ESR requirement.

How does the overtemperature shutdown behave during repeated fault events?

Overtemperature shutdown is non-latching: once junction temperature falls below the hysteresis threshold (typically ~140 °C), the device automatically resumes regulation. However, repeated cycling accelerates package degradation. The datasheet explicitly states protection functions are not designed for continuous repetitive operation-persistent overheating indicates inadequate PCB thermal design or excessive ambient temperature.

Is the heat slug electrically isolated in the PG-SOT223-4 package?

No. The heat slug in the PG-SOT223-4 package is internally connected to Pin 2 (GND) and must be soldered to a PCB ground plane. This dual role provides both thermal conduction and electrical grounding. Using insulating thermal pads or dielectric paste defeats the internal GND connection and degrades both thermal performance and noise immunity.