IFX91041EJ V33 Infineon Integrated Circuit (Small Outline Packages) In Stock
Infineon IFX91041EJ V33 is a step-down DC/DC switching regulator with 45 V input tolerance, 1.8 A output current, and a fixed 3.3 V output in an 8-pin DSO-8 package. Designed for automotive and industrial power supply designs requiring robust voltage conversion. Available from stock with worldwide shipping.
- Manufacturer
- Infineon
- Package
- Small Outline Packages
- Pin Count
- 9
- Lifecycle
- ACTIVE
- Datasheet
- IFX91041EJ V33 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Wide 45 V input voltage range enabling direct operation from 12 V and 24 V automotive or industrial bus rails including load-dump conditions
- Fixed 3.3 V output regulated within 3.17 V to 3.43 V at up to 1.8 A for powering microcontrollers and digital logic
- Compact 8-pin DSO-8 package integrating the switching controller and power transistor for minimal external component count and reduced PCB area
Applications
IFX91041EJ V33 is designed for automotive ECU power stages, industrial sensor nodes, and factory automation equipment where a rugged step-down regulator must supply 3.3 V from 12 V or 24 V rails at up to 1.8 A. The high 45 V input rating accommodates load-dump transients and start-stop events common in 12 V vehicle electrical systems. Its integrated switch and compact DSO-8 package reduce PCB area and simplify thermal management in space-limited designs.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for IFX91041EJ V33:
suggested
suggested
suggested
suggested
suggested
suggested
Frequently Asked Questions
Which automotive power supply designs can IFX91041EJ V33 support from a 12 V or 24 V bus?
IFX91041EJ V33 accepts input voltages up to 45 V, making it suitable for 12 V and 24 V automotive rails including those with load-dump transients. It delivers a fixed 3.3 V output at up to 1.8 A, sufficient to power microcontrollers, sensor interfaces, and digital logic in ECUs and body control modules.
How does the IFX91041EJ V33 maintain its output within 3.17 V to 3.43 V under varying load conditions?
The IFX91041EJ V33 uses internal feedback control to regulate its output within 3.17 V to 3.43 V across the full 1.8 A load range. The integrated switching controller adjusts duty cycle dynamically, maintaining tight output accuracy essential for 3.3 V rail-powered microcontrollers and FPGAs in automotive and industrial environments.
For an industrial sensor node, how does IFX91041EJ V33's DSO-8 package simplify PCB layout versus discrete regulator designs?
IFX91041EJ V33 integrates the switching controller and power transistor in an 8-pin DSO-8 package, eliminating the need for a separate driver IC and reducing external component count significantly. The 45 V input rating handles industrial rail transients, while the 1.8 A output can power multiple sensor ICs simultaneously from a single compact regulator footprint.
Related Guides
150141RS73100 Red LED Indicator and Current-Resistor Design Guide
Design a reliable 150141RS73100 red LED indicator with worst-case resistor sizing, GPIO checks, PWM drive, layout, and production validation.
Jul 11, 2026
742792651 Ferrite Bead EMI Filter and Power Integrity Design Guide
Practical guidance for using 742792651 in ferrite-bead EMI filters, including bias, DCR, damping, layout, and validation.
Jul 11, 2026
How to Choose a Ferrite Bead for EMI Suppression Rails: Selection Guide
Compare 742792651 and related ferrite beads by impedance, current rating, DCR, package, layout, and EMI test context.
Jul 10, 2026
150141BS73100 Design Guide for 3528 Status Indicator LED Circuits
Design 3528 status indicator LED circuits with 150141BS73100: current setting, resistor sizing, polarity, optics, and sourcing checks.
Jul 10, 2026
Why Buy from FindMyChip
About Infineon
Infineon is a leading electronic component manufacturer. FindMyChip sources Infineon ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”