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

Infineon Technologies IFX91041EJV50XUMA1

Name: IFX91041EJV50XUMA1
Brand: Infineon Technologies
SKU: IFX91041EJV50XUMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IFX91041EJV50XUMA1

Manufacturer:: Infineon Technologies

Category:: Voltage Regulators - DC DC Switching Regulators

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

Datasheet:: IFX91041EJV50XUMA1.pdf

Description:: IC REG BUCK 5V 1.8A DSO-8-27

Quantity:: RFQ Add To RFQ list

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Product details

Overview

IFX91041EJV50XUMA1 from Infineon Technologies is a monolithic 1.8A step-down (buck) DC/DC voltage regulator with fixed 5.0V output, ±2% tolerance at mid-load, 4.75–45V input range, and 370kHz switching frequency. It integrates a power DMOS transistor, feedforward PWM control, soft-start, and thermal shutdown. Used in industrial power supplies for programmable logic controllers requiring stable 5V rail generation under wide-input-voltage conditions.

For engineers reviewing the IFX91041EJV50XUMA1 datasheet, IFX91041EJV50XUMA1 pinout, IFX91041EJV50XUMA1 application, or IFX91041EJV50XUMA1 equivalent, key selection criteria include its adjustable synchronization input, bootstrap gate drive architecture, low shutdown current (<2µA), and operation across –40°C to +125°C junction temperature.

Technical Context

The IFX91041EJV50XUMA1 implements voltage-mode PWM regulation with feedforward path active from 8.0V to 36V input, enabling fast line transient rejection. Its internal charge pump supports gate drive during low-V_IN/high-duty-cycle conditions, while bootstrap UVLO prevents MOSFET overheating by disabling switching if V_BDS drops below V_BUO + 3.3V.

It features pulse-skipping mode for light-load efficiency and a 0.5ms typical soft-start ramp initiated after EN assertion or thermal recovery. The FB pin connects directly to the output capacitor for fixed-5V operation, eliminating external divider components and reducing BOM count.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 5.0V ±2% (mid-load), ±4% full-load range - ensures stable microcontroller core supply without external feedback tuning.
Max Output Current	1.8A continuous - supports single-rail powering of industrial I/O modules or sensor signal chains.
Input Voltage Range	4.75V to 45V - accommodates 12V/24V/36V industrial bus systems with brown-out margin.
Switching Frequency	370kHz - enables use of compact 18–56µH inductors and 33–120µF output capacitors.
Shutdown Current	<2µA - preserves battery or backup power in always-on monitoring systems.
Junction Temp Range	–40°C to +125°C - qualified for enclosure-mounted control electronics in harsh environments.
Thermal Resistance	R_thJA = 52K/W - requires exposed-pad PCB layout with thermal vias to sustain full load at 125°C ambient.

Pinout & Package

IFX91041EJV50XUMA1 is housed in PG-DSO-8-27, an 8-pin thermally enhanced SOIC package with exposed thermal pad (EP) connected to GND and heatsink plane.

Pin/Terminal	Circuit Role	Design Meaning
1 (SYNC)	Synchronization Input	Accepts external clock (≤370kHz) to align switching with system timing; tie to GND if unused.
2 (GND)	Power Ground	Main return path for power stage and control circuitry; must connect to EP and low-inductance ground plane.
3 (COMP)	Loop Compensation Node	Connects RC network to stabilize voltage-mode control loop; critical for transient response and phase margin.
4 (FB)	Feedback Input	Direct connection to 5V output capacitor - sets regulation point; no resistor divider needed for fixed-output version.
5 (BDS)	Bootstrap Supply Input	Drives high-side gate via external bootstrap capacitor; UVLO disables switching if voltage falls below V_BUO + 3.3V.
6 (BUO)	Buck Switch Output	Source terminal of integrated DMOS; connects to cathode of catch diode and buck inductor node.
7 (EN)	Enable Input	Active-high logic input with internal pull-down; asserts soft-start and enables regulation when >1.2V.
8 (VS)	Supply Voltage Input	Main input rail (4.75–45V); decoupling capacitor required close to pin for EMI suppression.

Key Features

Feature	Design Value
Integrated Power DMOS	Eliminates external high-side switch and driver IC, reducing component count and board area in space-constrained designs.
Feedforward PWM Control	Improves line transient response by 3× compared to standard voltage-mode control, minimizing output voltage dip during input surges.
Charge Pump Support	Enables reliable high-side gate drive down to 4.75V input, maintaining >92% duty cycle capability without external boost circuitry.
Soft-Start Ramp	0.5ms typical rise time limits inrush current and prevents overshoot during cold start or thermal recovery cycles.
Overtemperature Shutdown	Turns off power stage at T_j ≥ 175°C and auto-restarts after cooldown - protects against sustained overload or cooling failure.

Applications

Industrial PLC I/O Module

Factory Automation Sensor Hub

Use Scenario: Powering isolated digital I/O channels and analog input front-ends in DIN-rail mounted PLC backplanes.

IC Role / Device Role / Timing Role: Primary 5V buck regulator supplying FPGA configuration, ADC reference, and optocoupler LED drivers.

Use Value: Wide 4.75–45V input range accepts unregulated 24V DC field bus; ±2% output tolerance ensures accurate 12-bit ADC reference stability.

Use Scenario: Centralized 5V rail generation for multi-sensor nodes (temperature, pressure, vibration) in predictive maintenance gateways.

IC Role / Device Role / Timing Role: Main DC/DC converter feeding MCU, wireless transceiver, and signal-conditioning op-amps.

Use Value: 370kHz switching allows small 22µH inductor and 47µF ceramic output cap, reducing footprint vs. lower-frequency alternatives.

Motor Drive Control Board

Harsh-Environment Data Logger

Use Scenario: Generating clean 5V supply for gate driver ICs, position encoder interfaces, and safety monitoring circuits on servo drive control cards.

IC Role / Device Role / Timing Role: Secondary regulated rail derived from main 48V bus; synchronized to system clock via SYNC pin.

Use Value: Synchronization capability eliminates beat frequencies with motor PWM signals, reducing conducted EMI in EMC-critical drives.

Use Scenario: Battery-backed 5V supply for long-term environmental monitoring units deployed in outdoor enclosures (-40°C to +85°C ambient).

IC Role / Device Role / Timing Role: Always-on regulator operating in pulse-skipping mode during sleep cycles to extend battery life.

Use Value: <2µA shutdown current enables >5-year battery runtime with 2Ah Li-thion cell; -40°C to +125°C rating ensures reliability at extreme temperatures.

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	5V fixed, 5A output, 260kHz, no SYNC or charge pump; requires external high-side MOSFET.	Lacks synchronization and bootstrap support; unsuitable for tight EMI or ultra-low-V_IN operation.	Select if higher current (>1.8A) and lower cost are priorities, and input stays >7V.
TPS54302DDAR	5V fixed, 3A, 500kHz, integrated FETs, no charge pump; uses current-mode control.	No charge pump limits minimum input to ~6.5V; lacks thermal shutdown latch and sync input.	Prefer for higher efficiency above 12V input and where current-mode loop stability simplifies design.

Compared with LM2678SD-5.0/NOPB and TPS54302DDAR, IFX91041EJV50XUMA1 uniquely combines synchronization, charge-pump-assisted bootstrap, and automotive-grade thermal robustness in a 1.8A monolithic solution - ideal for industrial systems demanding precise timing alignment and wide-input-voltage resilience.

Availability

IFX91041EJV50XUMA1 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, factory automation sensor hubs, and motor drive control boards requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for IFX91041EJV50XUMA1 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 IFX91041 series belongs to Infineon's industrial-grade DC/DC regulator product line, designed specifically for ruggedized power conversion in programmable logic controllers, motor drives, and process instrumentation where reliability under thermal stress and wide input voltage variation is mandatory.

FAQ

What is the recommended minimum output capacitance for stable operation?

The datasheet specifies 33µF to 120µF for the output capacitor, with ESR ≤0.3Ω. A 47µF X7R ceramic capacitor with 2mΩ ESR is commonly used to ensure loop stability and meet ripple requirements under 1.8A load. Layout must minimize trace inductance between BUO, GND, and the capacitor.

Does IFX91041EJV50XUMA1 require external compensation components?

Yes - the COMP pin requires an external RC network (typically 10kΩ + 1nF) to set dominant pole and ensure phase margin >45° across load and input voltage variations. Compensation values depend on selected inductor and output capacitor; refer to Section 6.2 of the datasheet for design equations and stability plots.

Can the SYNC pin be left floating?

No - the SYNC pin must be either connected to a clean external clock source or tied directly to GND. Floating the pin may cause erratic switching frequency, increased EMI, or startup failure due to undefined logic state at power-up.

How does the bootstrap UVLO protect the power stage?

The bootstrap UVLO monitors V_BDS relative to V_BUO; if V_BDS falls below V_BUO + 3.3V, the high-side gate drive is disabled to prevent partial turn-on of the DMOS, which would cause excessive conduction loss and thermal runaway. This occurs during insufficient bootstrap capacitor recharge or rapid load transients.

IFX91041EJV50XUMA1 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:: Fixed

Number of Outputs:: 1

Voltage - Input (Min):: 4.75V

Voltage - Input (Max):: 45V

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

Voltage - Output (Max):: -

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

IFX91041EJV50XUMA1 FAQ

1.How can I place an order for IFX91041EJV50XUMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for IFX91041EJV50XUMA1 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 IFX91041EJV50XUMA1 reliable?

The price and inventory of IFX91041EJV50XUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IFX91041EJV50XUMA1 is usually 5 days.

3.What payment methods are accepted for IFX91041EJV50XUMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IFX91041EJV50XUMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IFX91041EJV50XUMA1?

IFX91041EJV50XUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IFX91041EJV50XUMA1 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 IFX91041EJV50XUMA1?

For technical support, including IFX91041EJV50XUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IFX91041EJV50XUMA1 requirements.

6.How does Aetrix verify that IFX91041EJV50XUMA1 is sourced from the original manufacturer or authorized distributors?

All IFX91041EJV50XUMA1 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 IFX91041EJV50XUMA1 meets industry standards.

7.What is the process for return or replacement of IFX91041EJV50XUMA1?

All IFX91041EJV50XUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with IFX91041EJV50XUMA1, 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 IFX91041EJV50XUMA1 part is unused and in its original packaging.

Return procedure for IFX91041EJV50XUMA1:

1.Submit a request within 90 days.

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

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