Infineon Technologies IFX25001TSV85AKSA1

Overview

IFX25001TSV85AKSA1 from Infineon is a fixed-output 8.5 V low-dropout linear voltage regulator in PG-TO220-3 package, delivering up to 400 mA output current with dropout voltage as low as 250 mV at 250 mA. It operates across 9.5–40 V input range, features reverse polarity protection, overtemperature shutdown (151–200 °C), and is qualified for industrial temperature range (−40 °C to +125 °C). Used in HDTV power rails and network router auxiliary supplies.

For engineers reviewing the IFX25001TSV85AKSA1 datasheet, IFX25001TSV85AKSA1 pinout, IFX25001TSV85AKSA1 application, or IFX25001TSV85AKSA1 equivalent, key selection criteria include guaranteed 8.5 V ±4% output accuracy at 5–400 mA load, thermal performance with R_thJA = 57 K/W (no heatsink) and 42 K/W (600 mm² heatsink), and compatibility with ≥22 µF/≤3 Ω ESR output capacitors.

Technical Context

The IFX25001TSV85AKSA1 implements a bandgap-referenced control amplifier driving a pass transistor, with integrated saturation control and protection circuitry. Its architecture enables stable regulation under wide input variation (9.5–40 V) while maintaining tight output tolerance (±4%) across −40 °C to +125 °C junction temperature.

Protection functions include current limiting (400–1100 mA trip), thermal shutdown (151–200 °C), and reverse polarity blocking. The device requires no external compensation and achieves 60 dB PSRR at 100 Hz, supporting noise-sensitive analog subsystems in consumer and industrial equipment.

Key Specifications

Pinout & Package

IFX25001TSV85AKSA1 uses the PG-TO220-3 package with an exposed heat slug electrically connected to GND. Thermal performance is enhanced by mounting the slug to a heatsink; PCB copper area improves conduction cooling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV76785DRVR and LD1085V85, IFX25001TSV85AKSA1 uniquely combines 400 mA output, 250 mV dropout, reverse polarity blocking, and thermal shutdown in a single TO-220 package-enabling robust, drop-in replacement in industrial and consumer power rails where fault resilience is mandatory.

Availability

IFX25001TSV85AKSA1 is available at Aetrix Electronics and suitable for HDTV power management, network router auxiliary supply, and industrial PLC I/O modules requiring stable component supply with full RoHS compliance and extended temperature support.

Supply support for IFX25001TSV85AKSA1 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 9001 and IATF 16949.

The IFX25001 series targets industrial and consumer power regulation, designed to replace discrete regulator solutions with integrated protection, wide input range, and thermal robustness in space-constrained TO-220 and surface-mount packages.

FAQ

What is the minimum input voltage required for stable 8.5 V output?

The IFX25001TSV85AKSA1 requires a minimum input voltage of 9.5 V to maintain regulation across its full load range (5–400 mA) and temperature span (−40 °C to +125 °C), per functional range specification 4.2.3. Below 9.5 V, dropout behavior begins and output voltage declines linearly with input.

Does this regulator require an external output capacitor, and what are its specifications?

Yes, a minimum 22 µF output capacitor with ESR ≤3 Ω at 10 kHz is required for stability, as specified in section 4.2.5–4.2.6. Ceramic or low-ESR tantalum types are recommended; placement must be within 5 mm of the Output and GND pins to minimize loop inductance.

How does the reverse polarity protection function, and what voltage levels does it withstand?

The internal protection blocks conduction when input polarity is reversed, preventing damage from −42 V applied to the Input pin (absolute maximum rating 4.1.1). It operates without external components and remains active across the full operating temperature range, eliminating need for series diodes in battery-backed systems.

Can IFX25001TSV85AKSA1 be used in automotive applications?

No-this variant is not qualified for automotive use. Infineon explicitly directs automotive and transportation applications to its TLE and TLF series regulators, which meet AEC-Q100 qualification, extended temperature grades, and automotive-specific fault coverage requirements not present in the IFX25001 series.