IR3889MTRPBF - 30A Sync Buck Regulator | Infineon | POL
MPN: IR3889MTRPBF β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.4 | $2.40 |
| 10 | $2.16 | $21.60 |
| 100 | $1.98 | $198.00 |
| 500 | $1.86 | $930.00 |
| 1,000 | $1.82 | $1,820.00 |
Drop-in alternatives for IR3889MTRPBF β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
IR3889MTRPBFAUMA1
β Drop-Inπ Reference alternative (not in catalog)
IR3890MTRPBF
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
IR3891MTRPBF
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
IR3878MTRPBF
β‘ Same Package β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
IR3889MTRPBF Maximum Ratings & Electrical Characteristics
| Topology | Synchronous Buck (IPOL) |
| Maximum Output Current | 30 A continuous |
| Input Voltage Range (single supply) | 4.3 V to 17 V |
| Input Voltage Range (external VCC) | 2.0 V to 17 V |
| Reference Voltage | 0.8 V +/- 0.5% |
| Output Voltage Range | 0.5 V to 0.875 x VIN (adjustable) |
| Control Scheme | Enhanced Constant-On-Time (COT) |
| Integrated MOSFETs | OptiMOS high-side and low-side |
| Bootstrap Diode | Integrated |
| Ceramic Output Capacitor Stability | Yes |
| Package | PG-IQFN-31, 5 x 6 mm, pitch 0.5 mm |
| Mounting Type | Surface Mount |
| Protection Features | Overcurrent, overvoltage, overtemperature |
| Product Family | OptiMOS IPOL / POWIRstage |
| RoHS Status | Compliant (Pb-free suffix PBF) |
IR3889MTRPBF pg-iqfn-31, 5 x 6 mm, pitch 0.5 mm Pin Configuration Guide
Complete pinout information for IR3889MTRPBF (pg-iqfn-31, 5 x 6 mm, pitch 0.5 mm package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for IR3889MTRPBF.
Refer to the datasheet for full pin configuration.
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
IR3889MTRPBF is suitable for 6 applications: FPGA Core Power Supply, Server and Data Center POL, Networking and Telecom Equipment, Storage Systems, Industrial Automation Control, Automotive Domain Controllers.
FPGA Core Power Supply
The IR3889MTRPBF powers FPGA core rails (typically 0.85V to 1.0V at 20-30A) where its 30A continuous rating and 0.8V +/-0.5% reference meet tight core-voltage accuracy windows. The enhanced fast COT engine reacts to millisecond-scale load steps during fabric switching without external compensation, and ceramic-only output capacitance keeps the solution compact near the FPGA BGA footprint.
Recommended
Server and Data Center POL
In server motherboards, the IR3889MTRPBF converts 12V intermediate bus voltages down to point-of-load rails for ASICs, memory controllers, and SoCs. Its 4.3V-17V single-supply input accepts 12V rails directly, integrated OptiMOS FETs maximize conversion efficiency at 30A to reduce heat in dense racks, and the 5x6mm IQFN conserves board area on multi-rail power trees.
Recommended
Networking and Telecom Equipment
Switch, router, and baseband line cards draw high continuous current on DSP and PHY rails. The IR3889MTRPBF's COT control provides fast transient response to bursty network traffic loads, overcurrent/overvoltage/overtemperature protection safeguards 24/7 operation, and the 2.0V-17V input range with external VCC accommodates varied telecom intermediate bus architectures.
Recommended
Storage Systems
Enterprise SSD and HDD controller rails demand reliable high-current POL conversion with minimal board space. The IR3889MTRPBF's integrated bootstrap diode and MOSFETs reduce external parts, ceramic-capacitor stability improves long-term reliability versus electrolytic solutions, and its protection suite (OCP, OVP, OTP) protects storage silicon during fault events such as hot-plug transients.
Recommended
Industrial Automation Control
PLC I/O modules and motor-control boards use the IR3889MTRPBF to derive 1-3.3V logic rails from 12V or 24V-derated industrial buses. Its wide input tolerance absorbs bus sag and surge, the PG-IQFN-31 exposed pad withstands vibration-reliable reflow onto heavy copper, and the -40C industrial ambient capability of the family supports unconditioned factory floor environments.
Recommended
Automotive Domain Controllers
Using the AEC-grade IR3889MTRPBFAUMA1 variant, automotive ECU and domain-controller boards power ADAS SoCs and radar processors. The shared die and PG-IQFN-31 footprint with the standard IR3889MTRPBF lets one PCB layout serve both automotive and industrial product lines, while the enhanced COT response handles sharp SoC load transitions during sensor fusion bursts.
Recommended
Recommended Products Summary
Engineering reference data for IR3889MTRPBF β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | IR3889MTRPBFAUMA1 | IR3890MTRPBF | IR3891MTRPBF |
|---|---|---|---|---|
| Package | PG-IQFN-31 (5x6mm) | PG-IQFN-31 (5x6mm) - same | PG-IQFN-31 (5x6mm) - same | PG-IQFN-31 (5x6mm) - same |
| Brand | Infineon | Infineon | Infineon | Infineon |
| Output Current | 30 A | 30 A | 15 A | 10 A |
| Input Voltage Range | 4.3-17 V (2.0-17 V w/ ext VCC) | 4.3-17 V (2.0-17 V w/ ext VCC) | [DATA_NEEDED] | [DATA_NEEDED] |
| Reference Voltage | 0.8 V +/- 0.5% | 0.8 V +/- 0.5% | 0.8 V +/- 0.5% | 0.8 V +/- 0.5% |
| Control Scheme | Enhanced fast COT | Enhanced fast COT | Enhanced fast COT | Enhanced fast COT |
| Quality Flow | Industrial/consumer | Automotive (AUMA1) | Industrial/consumer | Industrial/consumer |
| Price (1 pc) | ~$2.40 (as of 2026-08-29) | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Highest current in same IQFN-31 footprint (vs IR3890MTRPBF)
- Automotive drop-in option (vs IR3889MTRPBFAUMA1)
- Ceramic-capacitor stability with COT (vs IR3891MTRPBF)
Design Notes
At 30A output, conduction losses in the integrated OptiMOS FETs are the dominant heat source. Solder the PG-IQFN-31 exposed pad to a minimum of 2 oz copper with an array of thermal vias to internal planes. Derate output current per the datasheet thermal curves at elevated ambient; verify junction temperature at worst-case load and 70C ambient.
Keep the input capacitor loop (VIN to PGND) as small as possible - high di/dt in this loop drives EMI and voltage spikes. Place the output inductor and ceramic output capacitors close to the LX and VOUT pins. Follow Infineon's IR3889 evaluation board layout (per datasheet v02_06) as a reference for star-grounding PGND and SGND.
The enhanced COT engine requires a minimum effective output capacitance for stability - do not reduce ceramic caps below the datasheet minimum to save BOM cost. When using the 2.0V-17V input mode, apply external VCC before or with VIN per the datasheet power-up sequence to avoid undefined startup states.
Compliance Information
PBF (Pb-free) suffix indicates lead-free, RoHS-compliant construction per Infineon part nomenclature. Automotive applications should use IR3889MTRPBFAUMA1.
