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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Infineon Technologies IFX91041EJVXUMA1

Name: IFX91041EJVXUMA1
Brand: Infineon Technologies
SKU: IFX91041EJVXUMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IFX91041EJVXUMA1

Manufacturer:: Infineon Technologies

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 8-SOIC (0.154", 3.90mm Width) Exposed Pad

Datasheet:: IFX91041EJVXUMA1.pdf

Description:: IC REG BUCK ADJ 1.8A DSO-8-27

Quantity:: RFQ Add To RFQ list

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Inventory:1,597

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Product details

Overview

IFX91041EJVXUMA1 from Infineon Technologies is a monolithic 1.8A step-down (buck) DC/DC voltage regulator with adjustable output (0.60 V reference), 4.75–45 V input range, 370 kHz fixed switching frequency, and integrated power DMOS transistor. It features soft-start, synchronization input, feedforward line regulation, and operates across industrial temperature range (−40 °C to +125 °C) in PG-DSO-8-27 package.

For engineers reviewing the IFX91041EJVXUMA1 datasheet, IFX91041EJVXUMA1 pinout, IFX91041EJVXUMA1 application, or IFX91041EJVXUMA1 equivalent, key selection considerations include its adjustable feedback architecture (0.60 V reference), bootstrap gate drive with UVLO on BDS, ±2% output tolerance at mid-load, <2 µA shutdown current, and compatibility with low-ESR output capacitors (≤0.3 Ω).

Technical Context

The IFX91041EJVXUMA1 implements voltage-mode PWM control with feedforward path active from 8.0 V to 36 V input, enabling fast line transient rejection. Its internal charge pump supports gate drive during low-V_IN/high-duty-cycle conditions and disables automatically when bootstrap supply is sufficient.

Regulation stability relies on external RC compensation at COMP pin, while FB pin accepts either direct connection (fixed-output variants) or resistive divider (adjustable variant). The device integrates overtemperature shutdown (trip at ~175 °C), cycle-by-cycle current limiting (2.2–3.6 A peak), and soft-start ramp generation (~0.5 ms typical).

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	1.8 A continuous load capability with integrated DMOS switch and thermal shutdown protection
Input Voltage Range	4.75 V to 45 V - supports wide industrial supply rails including 12 V, 24 V, and 36 V systems
Feedback Reference	0.60 V ±2% - enables precise adjustable output from 0.60 V up to 16 V using external resistor divider
Switching Frequency	370 kHz fixed - allows use of compact, low-cost inductors (18–56 µH) and ceramic output capacitors
Shutdown Current	<2 µA - minimizes system standby power loss in battery-backed or energy-sensitive applications
Thermal Resistance	R_thJA = 52 K/W - requires exposed pad soldered to PCB copper pour for reliable 1.8 A operation at T_j ≤ 125 °C
Protection Functions	Overcurrent limit (2.2–3.6 A), overtemperature shutdown (~175 °C), input UVLO, bootstrap UVLO, and FB open-circuit clamp

Pinout & Package

IFX91041EJVXUMA1 is housed in PG-DSO-8-27: thermally enhanced 8-pin SOIC with exposed thermal pad (EP), RoHS-compliant, moisture sensitivity level 3.

Pin/Terminal	Circuit Role	Design Meaning
1 SYNC	Synchronization Input	Accepts external clock (≤5.5 V) to align switching frequency; tie to GND if unused
2 GND	Power Ground	Main return path; must be low-inductance connection to EP and system ground plane
3 COMP	Loop Compensation Node	Connects external RC network to stabilize voltage-mode control loop
4 FB	Feedback Input	0.60 V reference input; for adjustable version, connect via resistor divider to output
5 BDS	Bootstrap Supply Input	Drives high-side gate via external bootstrap capacitor; monitored for UVLO (V_BDS,off = V_BUO + 3.3 V)
6 BUO	Buck Switch Output	Source of internal DMOS; connects directly to catch diode cathode and inductor
7 EN	Enable Input	Active-high logic input with internal pull-down; >2.0 V enables regulator
8 VS	Supply Input	Main input voltage rail (4.75–45 V); decoupling capacitor required near pin
EP (Exposed Pad)	Thermal & Electrical Ground	Must be soldered to large GND copper area for thermal dissipation and noise reduction

Key Features

Feature	Design Value
Feedforward Line Regulation	Enables sub-10 µs line transient response for input steps within 8–36 V range without loop compensation changes
Integrated Charge Pump	Automatically activates below ~12 V input to sustain gate drive during startup and high-duty-cycle operation
Soft-Start Ramp	0.5 ms typical output voltage ramp prevents inrush current and overshoot during power-up or thermal recovery
FB Open-Circuit Protection	Internal pull-up current limits uncontrolled output rise if FB trace opens - specific to adjustable version (IFX91041EJV)
Pulse-Skipping Mode	Maintains regulation at light loads (ICC down to 0 mA) and high input voltages by skipping switching cycles

Applications

Industrial PLC Power Supply

Automated Test Equipment (ATE) Bias Rail

Use Scenario: Providing stable 3.3 V or 5.0 V bias for microcontrollers and I/O drivers in programmable logic controllers operating from 24 V DC bus.

IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated output with tight line/load regulation and robust fault handling.

Use Value: Enables single-stage conversion from 24 V to 3.3 V/5.0 V with <2 µA shutdown current, reducing auxiliary supply complexity and board space.

Use Scenario: Generating precision-adjustable analog supply (e.g., 1.8 V, 2.5 V) for ADC references and sensor excitation in modular ATE systems.

IC Role / Device Role / Timing Role: Adjustable buck controller with 0.60 V reference and ±2% tolerance supporting multi-voltage rail generation.

Use Value: Eliminates need for post-regulation LDOs by delivering accurate, low-noise output directly from wide-input industrial supply.

Motor Drive Auxiliary Power

Rail-to-Rail Industrial Sensor Interface

Use Scenario: Powering gate drivers and isolated communication ICs in 48 V motor inverters where EMI and thermal constraints demand high-efficiency, compact solution.

IC Role / Device Role / Timing Role: High-input-voltage buck regulator with 370 kHz switching and integrated DMOS, synchronized to main inverter clock via SYNC pin.

Use Value: Synchronization reduces beat-frequency noise; 45 V max input rating avoids derating when bus transients exceed nominal 48 V.

Use Scenario: Supplying dual rails (±5 V or +3.3 V/−5 V) for rail-to-rail op-amps and signal conditioning circuits in harsh industrial environments.

IC Role / Device Role / Timing Role: Primary positive rail generator paired with inverting charge-pump or negative LDO; leverages wide input range and −40 °C to +125 °C operation.

Use Value: Maintains regulation under brownout (down to 4.75 V) and survives ambient temperatures exceeding 85 °C without derating.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM2678SD-5.0/NOPB	Fixed 5.0 V output only; no adjustable option; 100 kHz switching; external MOSFET required	Lacks synchronization, soft-start control, and integrated high-side switch - requires additional components for full functionality	Select when cost sensitivity outweighs integration needs and 5.0 V fixed output suffices
TPS54302DDCR	Adjustable output (0.6 V ref); 2.5 A rating; 500 kHz switching; integrated FET; no charge pump or feedforward	Higher current and frequency but lacks feedforward path and bootstrap UVLO - less robust under wide-line transients	Prefer for higher efficiency at light loads and smaller magnetics, but verify line transient performance in 24 V+ systems

Compared with LM2678SD-5.0/NOPB and TPS54302DDCR, IFX91041EJVXUMA1 uniquely combines feedforward-enhanced line regulation, bootstrap UVLO, and industrial-grade thermal operation in a single DSO-8 package - critical for reliability in unregulated 24 V/48 V industrial power rails.

Availability

IFX91041EJVXUMA1 is available at Aetrix Electronics and suitable for industrial PLC power supplies, automated test equipment bias rails, motor drive auxiliary power, and rail-to-rail sensor interfaces requiring stable component supply across extended temperature and input voltage ranges.

Supply support for IFX91041EJVXUMA1 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 certifications including ISO/TS 16949 and ISO 14001.

The IFX91041 series belongs to Infineon's industrial-grade DC/DC regulator product line, designed specifically for ruggedized, high-reliability power conversion in factory automation, process control, and transportation infrastructure systems.

FAQ

What is the minimum recommended output capacitance and ESR for stable operation?

The datasheet specifies C_BU1 = 33–120 µF with ESR ≤ 0.3 Ω for stable loop behavior and ripple suppression. Ceramic capacitors meeting these values are preferred; tantalum or polymer types may be used if ESR falls within range and ripple current rating exceeds 1.8 A RMS.

Can IFX91041EJVXUMA1 operate with input voltage below 4.75 V?

No - the absolute minimum functional input voltage is 4.75 V per the datasheet's "Functional Range" table. Operation below this threshold risks failure to start, unstable regulation, or activation of undervoltage lockout; the device will not regulate output below this limit even with EN asserted.

How does the synchronization input (SYNC) affect switching behavior?

The SYNC pin accepts an external TTL/CMOS clock signal to force the internal oscillator to lock to that frequency. When driven, the device synchronizes its 370 kHz switching edge to the external clock's rising edge; if unused, it must be tied to GND to prevent noise-induced mis-triggering.

Is the exposed thermal pad electrically isolated or connected internally?

The exposed pad (EP) is internally connected to GND and must be soldered to a dedicated GND copper pour on the PCB. It serves both thermal conduction and electrical grounding functions; floating or non-GND connections degrade thermal performance and may cause instability or EMI issues.

IFX91041EJVXUMA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width) Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 4.75V

Voltage - Input (Max):: 45V

Voltage - Output (Min/Fixed):: 0.6V

Voltage - Output (Max):: 16V

Current - Output:: 1.8A

Frequency - Switching:: 370kHz

Synchronous Rectifier:: No

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-DSO-8-27

IFX91041EJVXUMA1 FAQ

1.How can I place an order for IFX91041EJVXUMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for IFX91041EJVXUMA1 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 IFX91041EJVXUMA1 reliable?

The price and inventory of IFX91041EJVXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IFX91041EJVXUMA1 is usually 5 days.

3.What payment methods are accepted for IFX91041EJVXUMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IFX91041EJVXUMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IFX91041EJVXUMA1?

IFX91041EJVXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IFX91041EJVXUMA1 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 IFX91041EJVXUMA1?

For technical support, including IFX91041EJVXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IFX91041EJVXUMA1 requirements.

6.How does Aetrix verify that IFX91041EJVXUMA1 is sourced from the original manufacturer or authorized distributors?

All IFX91041EJVXUMA1 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 IFX91041EJVXUMA1 meets industry standards.

7.What is the process for return or replacement of IFX91041EJVXUMA1?

All IFX91041EJVXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with IFX91041EJVXUMA1, 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 IFX91041EJVXUMA1 part is unused and in its original packaging.

Return procedure for IFX91041EJVXUMA1:

1.Submit a request within 90 days.

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

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