Infineon Technologies IFX25001TSV10AKSA1

Overview

IFX25001TSV10AKSA1 from Infineon is a low-dropout linear voltage regulator delivering a fixed 10.0 V output with ±4% tolerance, 400 mA continuous output current, 500 mV typical dropout at 250 mA, and operation across -40 °C to +125 °C junction temperature. It features reverse polarity protection, overtemperature shutdown at 151–200 °C, and supports input voltages up to 45 V - used in industrial power rails for HDTV mainboards and network router auxiliary supplies.

For engineers reviewing the IFX25001TSV10AKSA1 datasheet, IFX25001TSV10AKSA1 pinout, IFX25001TSV10AKSA1 application, or IFX25001TSV10AKSA1 equivalent, key selection criteria include dropout voltage at full load, thermal resistance (R_thJA = 22 K/W typ. for PG-TO263-3), output stability with ≥22 µF/≤3 Ω ESR capacitors, and compatibility with 10.5–40 V input range in automotive-adjacent industrial systems.

Technical Context

The IFX25001TSV10AKSA1 implements a bandgap-referenced control amplifier driving a pass transistor with integrated saturation control, enabling precise 10.0 V regulation under varying line and load conditions. Its protection circuitry includes dedicated thermal sensing and current-limit detection that triggers shutdown before junction damage occurs.

Designed for unregulated DC inputs (e.g., 12–24 V battery or rectified AC rails), it maintains regulation down to VI = 10.5 V at full 400 mA load due to its low dropout architecture. The internal GND-connected heat slug requires external heatsinking for sustained high-current operation above 200 mA in ambient >85 °C environments.

Key Specifications

Pinout & Package

IFX25001TSV10AKSA1 uses the PG-TO263-3 (D²PAK) thermally enhanced surface-mount package with an exposed GND-connected heat slug. Pin 1 is Input (VI), Pin 2 is Ground (GND), Pin 3 is Output (VQ); the heat slug is internally tied to Pin 2 and must be soldered to a thermal pad for reliable power dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV1117-10IDCYR and MCP1703T-1002E/MB, IFX25001TSV10AKSA1 delivers higher current (400 mA), integrated reverse polarity and thermal protection, and superior thermal performance in TO263 - making it preferred for industrial and high-reliability 10 V rail generation where fault resilience and sustained load capability are critical.

Availability

IFX25001TSV10AKSA1 is available at Aetrix Electronics and suitable for HDTV mainboard power, industrial PLC I/O modules, and network router auxiliary rails requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for IFX25001TSV10AKSA1 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 electronics, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.

The IFX25001 series belongs to Infineon's industrial-grade linear regulator product line, engineered for robust operation in harsh environments including manufacturing automation, home appliances, and infrastructure equipment where reliability under voltage transients and thermal stress is essential.

FAQ

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

The IFX25001TSV10AKSA1 requires a minimum input voltage of 10.5 V to maintain 10.0 V output at 400 mA load, based on its maximum dropout voltage of 500 mV at 250 mA and confirmed line regulation behavior across the functional input range. Below 10.5 V, output voltage drops linearly with input.

Can this regulator be used without an external heatsink in a 200 mA application at 70 °C ambient?

Yes - with R_thJA = 22 K/W (typ.) for PG-TO263-3 and 200 mA load dissipating ~0.1 W (V_dr × I_OUT ≈ 0.3 V × 0.2 A), junction temperature rise is ~2.2 °C, resulting in T_j ≈ 72.2 °C - well within the -40 °C to +125 °C operating range without additional heatsinking.

Does the device require a specific output capacitor type or value for stability?

Yes - the datasheet mandates a minimum 22 µF output capacitor with ESR ≤ 3 Ω at 10 kHz. Ceramic or low-ESR tantalum capacitors meeting these values ensure phase margin and prevent oscillation; using smaller or higher-ESR capacitors risks instability and output ripple amplification.

Is reverse polarity protection active during startup or only under steady-state fault conditions?

Reverse polarity protection is fully active at all times - including power-up, shutdown, and steady state - as it relies on internal MOSFET-level blocking architecture rather than external circuitry. The device withstands -42 V applied to the input pin indefinitely without conduction or damage, per Absolute Maximum Ratings.