My Inquiry
My Account
Infineon Technologies IFX80471SKVXUMA1
- Part No.:
- IFX80471SKVXUMA1
- Manufacturer:
- Infineon Technologies
- Category:
- DC DC Switching Controllers
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
IFX80471SKVXUMA1.pdf
- Description:
- IC REG CTRLR BUCK 14DSO
- Quantity:
- Payment:
- Shipping:
Inventory:2,188
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
IFX80471SKVXUMA1 from Infineon Technologies is a step-down DC/DC controller driving an external P-channel MOSFET, supporting 5V fixed or adjustable output (via FB divider), 5–60V input range, 360kHz fixed switching frequency, and 100% duty-cycle operation for ultra-low dropout. It delivers up to 2.3A output current in automotive and industrial power supplies.
For engineers reviewing the IFX80471SKVXUMA1 datasheet, IFX80471SKVXUMA1 pinout, IFX80471SKVXUMA1 application, or IFX80471SKVXUMA1 equivalent, key selection criteria include its integrated low-battery sense comparator (SI/SO), undervoltage reset output (RO), SYNC input for frequency locking, and <2µA shutdown current - critical for battery-powered and safety-critical 12V/24V systems.
Technical Context
The IFX80471SKVXUMA1 implements a current-mode PWM/PFM hybrid control scheme with internal oscillator synchronized via SYNC pin, enabling stable regulation across 1mA–2.3A load range without minimum load requirement. Its 100% duty-cycle capability maintains regulation down to VIN – VOUT ≈ 0.3V.
It integrates dual comparators: SI input referenced to 1.25V for battery monitoring (SO open-drain output), and VOUT-sensing undervoltage reset (RO open-drain) with 4.5–4.8V threshold and 50mV hysteresis. The COMP pin supports Type II/III compensation networks for loop stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 60V - supports wide-range automotive battery inputs including cold-crank (6V) and load-dump (60V) transients. |
| Output Voltage | 5V fixed (IFX80471SKV50 variant) or adjustable via external resistor divider on FB pin - enables flexible rail generation. |
| Switching Frequency | Fixed 360kHz - allows use of compact SMD inductors & reduces EMI compared to lower-frequency controllers. |
| Max Output Current | 2.3A - determined by external P-MOSFET and thermal design; enables up to 11.5W at 5V output. |
| Quiescent Current | <120µA in light-load PFM mode - extends battery life in always-on vehicle modules. |
| Shutdown Current | <2µA (IFX80471SKV variant) - achieved by disabling reference, driver, and regulators when ENABLE = low. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive environments per AEC-Q100 stress test conditions. |
Pinout & Package
IFX80471SKVXUMA1 is housed in PG-DSO-14 (14-pin exposed pad SOIC) package, RoHS-compliant, with thermal pad for enhanced heat dissipation in high-power density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ENABLE) | Active-high enable control | Shuts down all internal circuitry including reference, driver, and comparators; reduces IQ to <2µA. |
| 2 (FB) | Feedback voltage sensing | Connects to external resistor divider for adjustable output; internally tied to 5V divider in SKV50 variant. |
| 3 (VOUT) | Buck output voltage input | Provides internal bias supply; must connect directly to output capacitor node for accurate regulation. |
| 4 (GND) | Analog ground reference | Low-impedance return path for feedback, compensation, and sense circuits; separate from power ground. |
| 5 (SYNC) | External clock synchronization input | Overrides internal oscillator; accepts TTL/CMOS clock signals to eliminate beat frequencies in multi-rail systems. |
| 6 (SI_GND) | Low-battery comparator ground switch | Switched to GND or high-Z by SI_ENABLE; sets reference point for SI voltage divider. |
| 7 (SI) | Sense comparator input | Compares external voltage (e.g., battery) against 1.25V internal reference; drives SO open-drain output. |
| 8 (COMP) | Loop compensation network connection | Accepts RC network to stabilize control loop; determines phase margin and transient response. |
| 9 (SO) | Sense comparator output | Open-drain output indicating low-battery condition; pulled up to VOUT via internal 20kΩ resistor in SKV50. |
| 10 (RO) | Undervoltage reset output | Open-drain output asserting reset when VOUT drops below 4.5–4.8V; includes 50mV hysteresis. |
| 11 (BDS) | Buck driver supply | Provides clamped gate-source voltage for P-MOSFET; requires ceramic capacitor to VS for charge pump operation. |
| 12 (GDRV) | Gate drive output | Swings between VS and BDS to fully enhance external P-channel MOSFET; peak current limited internally. |
| 13 (VS) | Main supply input | Connects to input capacitor bank; powers internal bias circuitry and gate driver; requires local 220nF ceramic cap. |
| 14 (CS) | Current-sense input | Monitors voltage drop across external sense resistor between VS and CS to limit peak inductor current. |
Key Features
| Feature | Design Value |
|---|---|
| PWM/PFM Hybrid Control | Eliminates minimum load requirement and reduces quiescent current to <120µA at light loads without compromising regulation accuracy. |
| 100% Duty-Cycle Operation | Enables regulation down to VIN − VOUT ≈ 0.3V, critical for maintaining 5V rail during automotive cold-crank (6V battery). |
| Integrated Low-Battery Comparator | SI/SO pins provide configurable battery monitoring with 1.25V internal reference and open-drain output - no external comparator needed. |
| Dual Open-Drain Status Outputs | SO (battery sense) and RO (output UVLO) support independent system-level fault signaling and sequencing without additional logic. |
| SYNC Input for Frequency Locking | Allows synchronization to master clock in multi-converter systems, preventing subharmonic interference and simplifying EMI filtering. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC I/O Power Supply |
|---|---|
|
Use Scenario: Powering microcontrollers, CAN transceivers, and sensor interfaces in vehicle door modules and lighting controllers. IC Role / Device Role / Timing Role: Primary 5V buck controller regulating from 12V battery; provides stable rail despite load-dump and cold-crank transients. Use Value: 100% duty cycle maintains 5V output down to 5.3V input, while <2µA shutdown current meets ISO 16750-2 sleep-mode requirements. |
Use Scenario: Generating isolated 5V logic supply for digital I/O cards in programmable logic controllers. IC Role / Device Role / Timing Role: Non-isolated step-down controller driving external P-MOSFET; supplies 2.3A to FPGA, level shifters, and optocouplers. Use Value: SYNC input enables precise timing alignment with main system clock, reducing conducted EMI in densely packed backplanes. |
| Telematics Control Unit (TCU) Power Management | Rail Monitoring System for Battery Packs |
|
Use Scenario: Powering LTE modem, GNSS receiver, and MCU in automotive telematics units requiring always-on connectivity. IC Role / Device Role / Timing Role: Main 5V regulator with integrated undervoltage reset (RO) and battery sense (SO) for autonomous fault detection. Use Value: RO output asserts hardware reset when VOUT falls below 4.5V (±0.3V), ensuring clean reboot during brownout events. |
Use Scenario: Monitoring individual cell voltages in 12S Li-ion battery packs using resistive dividers and comparator interface. IC Role / Device Role / Timing Role: Precision voltage comparator (SI/SO) with 1.25V internal reference used as analog front-end for cell voltage threshold detection. Use Value: SO open-drain output directly drives microcontroller interrupt pin or LED driver, eliminating external comparator and pull-up components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5116PWPR | N-channel MOSFET driver; requires bootstrap capacitor; no integrated battery sense comparator. | Lacks SI/SO and RO outputs - external comparators needed for battery monitoring and reset functions. | Select when higher efficiency at >3A is required and board space permits added discrete components. |
| TPS54240DGQR | Integrated N-MOSFET driver; 3.5–40V input; no 100% duty-cycle capability. | Cannot regulate below VIN − 0.8V; unsuitable for cold-crank operation where VIN dips to 6V. | Choose for cost-sensitive industrial supplies where input stays above 8V and battery monitoring is not required. |
Compared with LM5116PWPR and TPS54240DGQR, IFX80471SKVXUMA1 uniquely combines P-MOSFET drive, 100% duty cycle, and dual integrated comparators - reducing BOM count and enabling single-chip solutions for automotive power nodes with strict cold-crank and fault-signaling requirements.
Availability
IFX80471SKVXUMA1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power rails, telematics control units, and battery monitoring systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for IFX80471SKVXUMA1 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 ICs, and industrial control solutions, with global manufacturing and qualification to AEC-Q100 standards.
The IFX80471 belongs to Infineon's automotive-grade DC/DC controller product line, designed specifically for robust 12V/24V system power conversion in harsh environments - emphasizing fault resilience, wide input range, and integrated protection features.
FAQ
What is the function of the SI and SO pins?
The SI pin is the input to an internal 1.25V-referenced comparator used for battery voltage monitoring or generic threshold detection. The SO pin is its open-drain output, pulled up to VOUT via an internal 20kΩ resistor in the 5V-fixed variant. When SI voltage falls below 1.25V, SO pulls low to signal low-battery condition - no external pull-up required in most configurations.
Can IFX80471SKVXUMA1 operate with input voltage below 5V?
No - the absolute minimum input voltage is 5V per datasheet Section 4.2 (Functional Range). Below this, internal bias circuitry cannot sustain regulation. The 100% duty-cycle feature only applies within the specified 5–60V operating range and does not extend functionality below 5V.
How is the undervoltage reset (RO) threshold set?
The RO output asserts low when VOUT drops below a factory-trimmed threshold of 4.5–4.8V (typical 4.65V) with 50mV hysteresis. This threshold is fixed and internal - no external resistor programming is supported. RO is an open-drain output and requires an external pull-up to VOUT or another logic rail for proper interfacing.
What layout considerations are critical for stable operation?
Place a 220nF ceramic capacitor directly between VS and GND, minimize trace length from CS to sense resistor, route GDRV and BDS with low-inductance paths to the P-MOSFET, and isolate analog ground (pins 4, 8) from power ground using star grounding near the IC. Thermal pad must be soldered to a large copper pour for junction temperature control.
IFX80471SKVXUMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 5V ~ 60V
- Frequency - Switching:
- 360kHz
- Duty Cycle (Max):
- 100%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Enable, Reset
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-DSO-14-1
IFX80471SKVXUMA1 FAQ
1.How can I place an order for IFX80471SKVXUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for IFX80471SKVXUMA1 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 IFX80471SKVXUMA1 reliable?
The price and inventory of IFX80471SKVXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IFX80471SKVXUMA1 is usually 5 days.
3.What payment methods are accepted for IFX80471SKVXUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IFX80471SKVXUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IFX80471SKVXUMA1?
IFX80471SKVXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IFX80471SKVXUMA1 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 IFX80471SKVXUMA1?
For technical support, including IFX80471SKVXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IFX80471SKVXUMA1 requirements.
6.How does Aetrix verify that IFX80471SKVXUMA1 is sourced from the original manufacturer or authorized distributors?
All IFX80471SKVXUMA1 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 IFX80471SKVXUMA1 meets industry standards.
7.What is the process for return or replacement of IFX80471SKVXUMA1?
All IFX80471SKVXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with IFX80471SKVXUMA1, 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 IFX80471SKVXUMA1 part is unused and in its original packaging.
Return procedure for IFX80471SKVXUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IFX80471SKVXUMA1 Tags
-
UCC28C45DR
Texas Instruments
-
UCC28C40DR
Texas Instruments
-
UCC28C43DR
Texas Instruments
-
ZXSC410E6TA
Diodes Incorporated
-
LM3524DMX/NOPB
Texas Instruments
-
LM3489MMX/NOPB
Texas Instruments
-
MIC2102YML-TR
Microchip Technology
-
LM5148RGYR
Texas Instruments
-
TL598CDR
Texas Instruments
-
LM5155DSSR
Texas Instruments
-
LM25085MYX/NOPB
Texas Instruments
-
UCC2813DTR-0
Texas Instruments
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
