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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Infineon Technologies IFX78M05ABTFATMA1

Name: IFX78M05ABTFATMA1
Brand: Infineon Technologies
SKU: IFX78M05ABTFATMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IFX78M05ABTFATMA1

Manufacturer:: Infineon Technologies

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: IFX78M05ABTFATMA1.pdf

Description:: IC REG LINEAR 5V 500MA TO252-3

Quantity:: RFQ Add To RFQ list

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Inventory:4,059

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Product details

Overview

IFX78M05ABTFATMA1 from Infineon Technologies is a monolithic 3-terminal positive linear voltage regulator delivering a fixed 5 V output at up to 500 mA, with input voltage support up to 35 V, thermal shutdown, short-circuit current limiting, and safe-area protection. It operates across –40 °C to +125 °C junction temperature and is packaged in PG-TO-252-3 for thermal performance in industrial power rails and local board-level regulation.

For engineers reviewing the IFX78M05ABTFATMA1 datasheet, IFX78M05ABTFATMA1 pinout, IFX78M05ABTFATMA1 application, or IFX78M05ABTFATMA1 equivalent, key selection criteria include dropout voltage (2 V @ 500 mA), load regulation (15 mV), PSRR (75 dB @ 120 Hz), quiescent current (5.0 mA), and thermal resistance (R_thJA = 27 K/W on FR4 2s2p).

Technical Context

The IFX78M05ABTFATMA1 implements internal current-limiting, thermal shutdown, and safe-area compensation using an error amplifier, voltage reference, and bias circuitry. Its block diagram confirms a classic series-pass architecture with IN, GND, and OUT terminals and no external feedback network-output is fixed at 5 V via internal resistor divider.

It functions within a 7.5–35 V input range and maintains regulation under load currents from 5 mA to 500 mA. Protection features activate only during fault conditions-not for continuous operation-and are designed to prevent destruction, not sustain repetitive overloads.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.00 V ±1.9%, stable across 5–500 mA load and –40 °C to +125 °C junction temp
Max Input Voltage	35 V absolute max; functional range starts at 7.5 V to maintain line regulation
Dropout Voltage	2.0 V @ 500 mA, defining minimum headroom needed for regulation at full load
Load Regulation	15 mV change over 5–500 mA load, critical for stable supply to sensitive analog/digital loads
PSRR	75 dB @ 120 Hz, enabling effective rejection of rectified AC ripple in offline power supplies
Quiescent Current	5.0 mA @ 500 mA load, directly impacting no-load power loss in always-on systems
Thermal Resistance	R_thJA = 27 K/W on JEDEC-standard FR4 2s2p board, guiding heatsink and layout design

Pinout & Package

IFX78M05ABTFATMA1 is housed in the PG-TO-252-3 (DPAK) thermally enhanced surface-mount package, featuring an exposed thermal pad internally connected to GND for PCB heat sinking.

Pin/Terminal	Circuit Role	Design Meaning
1 (IN)	Input Supply Terminal	Accepts unregulated DC input (7.5–35 V); requires ≥0.33 µF ceramic capacitor to ground for stability
2 (GND)	Ground Reference & Thermal Path	Reference node for regulation; internally bonded to thermal tab-must be soldered to large copper pour
3 (OUT)	Regulated Output Terminal	Delivers fixed 5 V; requires ≥100 nF ceramic capacitor to ground for transient response and loop stability

Key Features

Feature	Design Value
Overtemperature Protection	Thermal shutdown activates at ~150 °C junction temperature, halting output until safe cooldown
Short-Circuit Current Limit	Clamps output to ~0.8 A at 35 V input, preventing destructive current during output faults
Safe-Area Compensation	Dynamically limits internal power dissipation to avoid second breakdown during high-V_IN/high-I_OUT transients
Green Product Compliance	RoHS-compliant materials and manufacturing-no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE

Applications

Industrial PLC I/O Modules

Automotive Body Control Units (Non-Safety)

Use Scenario: Local 5 V rail generation for microcontroller peripherals and sensor interfaces in DIN-rail mounted controllers.

IC Role / Device Role / Timing Role: Fixed-output linear regulator providing low-noise, fault-protected local power independent of main system rail.

Use Value: 40 µV RMS output noise and 75 dB PSRR ensure clean supply for ADC references and CAN transceivers.

Use Scenario: Powering non-safety-critical lighting drivers and door module logic in 12 V vehicle architectures.

IC Role / Device Role / Timing Role: Robust 5 V regulator tolerant of load dump and cold-crank conditions up to 35 V input.

Use Value: Short-circuit limit (0.8 A) and thermal shutdown enable survival during wiring faults without external fusing.

Point-of-Load Regulators in Telecom Equipment

Medical Diagnostic Instrumentation

Use Scenario: On-board 5 V supply for FPGA configuration circuits and interface ICs in base station line cards.

IC Role / Device Role / Timing Role: Local regulation eliminating IR drop and noise coupling from centralized DC/DC converters.

Use Value: 27 K/W R_thJA allows reliable 500 mA operation on standard FR4 without dedicated heatsinks.

Use Scenario: Powering isolated data acquisition front-ends and display controllers in portable ultrasound devices.

IC Role / Device Role / Timing Role: Low-noise, wide-temp linear regulator supporting FDA-cleared Class II medical electronics.

Use Value: –40 °C to +125 °C operating range and RoHS compliance meet IEC 60601-1 environmental and material requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM78M05CDT/NOPB	Higher quiescent current (6.5 mA typ), lower PSRR (70 dB), R_thJA = 65 K/W (SOIC-8)	Limited to ≤250 mA continuous in same PCB area due to thermal constraints	Prefer when SOIC-8 footprint required and load < 300 mA
TLV76050DBVR	Lower dropout (300 mV @ 150 mA), but max I_OUT = 150 mA and no short-circuit foldback	Not suitable for 500 mA loads or automotive transients; lacks safe-area protection	Choose only for ultra-low-dropout needs with light loads and benign environments

Compared with LM78M05CDT/NOPB and TLV76050DBVR, IFX78M05ABTFATMA1 uniquely combines 500 mA capability, 27 K/W thermal performance in DPAK, and integrated safe-area protection-making it optimal for industrial and automotive body electronics where robustness and power density matter.

Availability

IFX78M05ABTFATMA1 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, telecom point-of-load regulation, medical diagnostic instrumentation, and automotive body control units requiring stable component supply and long-term lifecycle assurance.

Supply support for IFX78M05ABTFATMA1 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 ISO 9001.

The IFX78M05 belongs to Infineon's legacy linear regulator product line, designed specifically for ruggedized fixed-voltage local regulation in harsh industrial and non-safety automotive environments-prioritizing fault resilience over ultra-low IQ or ultra-low dropout.

FAQ

Is IFX78M05ABTFATMA1 qualified for automotive safety-critical applications?

No. The datasheet explicitly states this device is "not qualified and manufactured according to the requirements of Infineon Technologies with regards to automotive and/or transportation applications." For ASIL-compliant designs, use Infineon's TLx series (e.g., TLE4274) instead. IFX78M05ABTFATMA1 is rated for industrial and non-safety automotive body electronics only.

What is the minimum input capacitor required for stable operation?

A minimum 0.33 µF ceramic capacitor is required between IN and GND, placed as close as possible to the device pins. This value ensures stability across the full operating range and prevents oscillation under transient load conditions, per Section 3.2 and Figure 12 in the official datasheet.

Can IFX78M05ABTFATMA1 be used in parallel to increase output current?

No. The device lacks built-in current-sharing circuitry or matching tolerance specifications for paralleling. Attempting parallel operation risks thermal runaway due to V_OUT mismatch (±1.9%) and unequal thermal coupling. For >500 mA, select a higher-current regulator or switch-mode solution.

Does the GND pin require a dedicated PCB plane or thermal connection?

Yes. Pin 2 (GND) is internally connected to the thermal tab. To achieve the specified R_thJA = 27 K/W, the tab must be soldered to a minimum 300 mm² copper pour on the top layer, with ≥4 thermal vias to inner ground planes. Without this, junction temperature rise exceeds safe limits at full load.

IFX78M05ABTFATMA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 35V

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 2V @ 500mA (Typ)

Current - Output:: 500mA

Current - Quiescent (Iq):: 5 mA

Current - Supply (Max):: 6 mA

PSRR:: 75dB (120Hz)

Control Features:: -

Protection Features:: Over Current, Over Temperature, Short Circuit

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-TO252-3

IFX78M05ABTFATMA1 FAQ

1.How can I place an order for IFX78M05ABTFATMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for IFX78M05ABTFATMA1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for IFX78M05ABTFATMA1 reliable?

The price and inventory of IFX78M05ABTFATMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IFX78M05ABTFATMA1 is usually 5 days.

3.What payment methods are accepted for IFX78M05ABTFATMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IFX78M05ABTFATMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IFX78M05ABTFATMA1?

IFX78M05ABTFATMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IFX78M05ABTFATMA1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for IFX78M05ABTFATMA1?

For technical support, including IFX78M05ABTFATMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IFX78M05ABTFATMA1 requirements.

6.How does Aetrix verify that IFX78M05ABTFATMA1 is sourced from the original manufacturer or authorized distributors?

All IFX78M05ABTFATMA1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that IFX78M05ABTFATMA1 meets industry standards.

7.What is the process for return or replacement of IFX78M05ABTFATMA1?

All IFX78M05ABTFATMA1 units undergo pre-shipment inspection (PSI). If there is an issue with IFX78M05ABTFATMA1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The IFX78M05ABTFATMA1 part is unused and in its original packaging.

Return procedure for IFX78M05ABTFATMA1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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