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Infineon Technologies IR3892MTRPBF
- Part No.:
- IR3892MTRPBF
- Manufacturer:
- Infineon Technologies
- Package:
- 31-PowerVFQFN
- Datasheet:
-
IR3892MTRPBF.pdf
- Description:
- IC REG BUCK ADJ 6A DL 31PQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,024
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Product details
Overview
IR3892MTRPBF from Infineon Technologies (formerly International Rectifier) is a dual-output, 6A/phase synchronous buck regulator with integrated high- and low-side MOSFETs, drivers, bootstrap diodes, and PWM controller in a single 5mm × 6mm PQFN package. It operates from 1V–21V input, delivers 0.5V–0.86×PVin outputs, supports up to 1MHz switching frequency, and includes precision 0.5V ±1% reference, thermal shutdown, OVP, and hiccup-mode overcurrent protection - deployed in server VRMs and telecom point-of-load systems.
For engineers reviewing the IR3892MTRPBF datasheet, IR3892MTRPBF pinout, IR3892MTRPBF application, or IR3892MTRPBF equivalent, key selection criteria include interleaved-phase current capability, programmable RT/sync frequency setting, monotonic startup behavior, sequenced dual-rail enable via Seq pin, and open-loop protection features including Vsns-based OVP and PGnd-isolated power ground routing.
Technical Context
The IR3892 implements a voltage-mode PWM control architecture with feed-forward line regulation and internal digital soft-start. Its dual-channel design uses interleaved switching to reduce input ripple current and capacitor stress, while independent error amplifiers (Comp1/Comp2, FB1/FB2) support asymmetric output configurations (e.g., 1.8V/1.2V).
Each phase integrates thermally compensated current sensing via Vsns pins, fixed off-time control (200–250 ns), and a dedicated LDO (VCC/LDO_out = 5.0–5.6V) that powers gate drivers and logic. The Seq pin enables controlled power-up sequencing for channel 2 only, and Rt/Sync supports either resistor-programmed free-run (300–1000 kHz) or external clock synchronization (270–1100 kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1V–21V (PVin); 5V–21V (Vin): Enables direct connection to 12V/5V intermediate bus or wide-range industrial supplies. |
| Output Current | 6A per phase (dual-channel): Supports high-density dual-rail loads such as CPU core + I/O rails or ASIC VDD/VDDQ pairs. |
| Switching Frequency | 300–1000 kHz (Rt-programmable) or 270–1100 kHz (sync-capable): Balances efficiency vs. size trade-offs in compact PCB layouts. |
| Reference Voltage | 0.5V ±1% (0°C–85°C): Enables accurate sub-1V output regulation critical for modern SoCs and FPGAs. |
| Thermal Shutdown | 140°C trip with 20°C hysteresis: Provides robust fault recovery without latch-up during transient overload or airflow loss. |
| Package | 5mm × 6mm PQFN, 31-pin: Optimized for thermal dissipation (θJB = 3.6°C/W) and high-current routing with multiple PGnd and PVin pins. |
Pinout & Package
IR3892MTRPBF is housed in a thermally enhanced 5mm × 6mm Power QFN (PQFN) package with exposed thermal pad and 31 terminals. Pin assignment follows top-view layout with dedicated power grounds (PGnd1/2), input buses (PVin1/2), switch nodes (SW1/SW2), and dual-channel control signals (EN1/EN2, FB1/FB2, Comp1/Comp2, PGood1/PGood2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vin, VCC/LDO_out | Bias supply input/output | Powers internal logic and gate drivers; internal LDO delivers regulated 5.0–5.6V at ≤60mA with 0.75V dropout. |
| PVin1/2, PGnd1/2 | Power stage input/ground | Dedicated high-current paths for each phase; multiple parallel pins minimize IR drop and improve thermal spreading. |
| SW1/SW2 | Switch node | Connects to external inductors; rated for -4V AC (100ns) / 25V DC; requires 100nF boot capacitors to Boot1/Boot2. |
| Fb1/Fb2, Comp1/Comp2 | Feedback & compensation | Inverting inputs to error amplifiers; Comp pins interface with RC networks to stabilize loop response across load/transient conditions. |
| Vsns1/Vsns2 | OVP & PGood sense | Monitors output voltage via resistor divider; triggers OVP at 115–125% Vref and PGood at 75–90% Vref with hysteresis. |
| Rt/Sync | Frequency control | Configurable as resistor-set oscillator (300–1000 kHz) or sync input (270–1100 kHz); supports smooth clock transition during sync events. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated power stage | On-die high- and low-side MOSFETs (Rds(on)_Top = 27.5–36.4 mΩ, Rds(on)_Bot = 19.5–24.2 mΩ) eliminate external driver complexity and layout sensitivity. |
| Interleaved dual-phase operation | Reduces input RMS current by ~70% versus single-phase, enabling smaller bulk capacitors and lower EMI filter requirements. |
| Monotonic start-up | Guarantees non-reversing output voltage ramp during soft-start, preventing negative transients on pre-biased rails. |
| Sequencing support | Seq pin connects only to Channel 2 error amplifier, allowing independent delay control for staggered rail activation in multi-voltage systems. |
| Open feedback line protection | Detects open-circuit FB connections and disables regulation before unsafe overvoltage occurs - critical for field-replaceable modules. |
Applications
| Server VRM | Telecom Point-of-Load |
|---|---|
Use Scenario: Dual-rail power delivery for x86 CPU cores (VDD) and I/O (VDDIO) in 1U rack servers with strict thermal envelope constraints. IC Role / Device Role / Timing Role: Primary synchronous buck regulator managing dynamic load steps up to 100A/µs with interleaved phase timing to suppress input ripple. Use Value: Integrated MOSFETs and 5mm × 6mm footprint reduce board area by >35% versus discrete controller + DrMOS solutions while maintaining <±1% output accuracy. |
Use Scenario: Distributed 1.2V/1.8V supplies for packet processing ASICs in carrier-grade routers operating at -40°C to 85°C ambient. IC Role / Device Role / Timing Role: Dual-channel PoL regulator with independent EN1/EN2 and Seq-controlled startup sequence for FPGA configuration and data-path initialization. Use Value: Thermal shutdown at 140°C and -40°C to 125°C junction rating ensure reliable operation in sealed, fanless telecom enclosures. |
| Storage Controller | Embedded Networking |
Use Scenario: Compact 3.3V → 1.2V/1.8V conversion for NVMe SSD controllers where PCB real estate is constrained by M.2 form factor. IC Role / Device Role / Timing Role: High-efficiency dual-output regulator with 600kHz default switching frequency balancing conduction loss and inductor size. Use Value: Interleaved phases cut input capacitance requirement by 50%, enabling use of smaller 1206-case ceramic caps instead of larger tantalum alternatives. |
Use Scenario: Powering ARM-based network processors and PHYs in industrial Ethernet switches requiring rail sequencing and brownout immunity. IC Role / Device Role / Timing Role: Dual-channel regulator with VCC_UVLO (4.0–4.4V start) and EN_UVLO (1.14–1.26V) supporting clean power-up under unstable 5V bus conditions. Use Value: Precision 0.5V ±1% reference and feed-forward line regulation maintain <±15mV output deviation across 12V ±10% input variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP8765GQ-Z (Monolithic Power) | Single 6A output (not dual); 2.5V–18V input; no Seq pin; 0.6V reference; 500kHz fixed frequency. | Suitable for single-rail applications only; lacks channel sequencing and independent FB/Comp per phase. | Select when only one regulated rail is needed and board space allows larger external MOSFETs. |
| TPS546D24 (Texas Instruments) | Dual 10A/channel; 3.0V–18V input; PMBus interface; 0.5V reference; 200kHz–1.5MHz programmable frequency. | Requires external programming and telemetry infrastructure; higher cost and BOM count due to PMBus components. | Select when digital monitoring, margining, and telemetry are required for enterprise-class power management. |
Compared with MP8765GQ-Z and TPS546D24, IR3892MTRPBF offers native dual-phase integration without external drivers or serial interface overhead - delivering optimal balance of density, analog simplicity, and sequencing flexibility for cost-sensitive, thermally constrained embedded power designs.
Availability
IR3892MTRPBF is available at Aetrix Electronics and suitable for server VRMs, telecom point-of-load converters, and embedded networking equipment requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for IR3892MTRPBF 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 acquired International Rectifier in 2015 and continues to develop and support its SupIRBuck® family of highly integrated DC/DC regulators.
The IR3892 belongs to Infineon's SupIRBuck® product line, engineered specifically for high-efficiency, space-constrained point-of-load applications in computing, networking, and storage infrastructure.
FAQ
What is the maximum supported input voltage for IR3892MTRPBF?
The absolute maximum PVin rating is 25V, but recommended operating range is 1.0V to 21V per electrical specifications. Exceeding 21V may trigger overvoltage protection or damage the internal MOSFETs. For 24V bus applications, an upstream pre-regulator or clamp circuit is required.
Does IR3892MTRPBF support pre-bias startup?
Yes - IR3892MTRPBF includes documented pre-bias startup capability, allowing safe turn-on when output capacitors are already charged. This prevents reverse current flow and ensures monotonic rise even on rails with stored energy from adjacent converters.
How is thermal performance validated for this PQFN package?
Thermal resistance is characterized per JEDEC standards: θJB = 3.6°C/W (junction-to-PCB) and θJA = 24.7°C/W (junction-to-ambient on high-conductivity test board). Layout must use full thermal pad soldering and ≥4 thermal vias to achieve rated performance.
Can the two output channels operate at different voltages and frequencies?
Yes - FB1/FB2 and Comp1/Comp2 are fully independent, enabling asymmetric outputs (e.g., 1.2V and 1.8V). However, both channels share the same Rt/Sync pin and therefore operate at identical switching frequencies; independent frequency control is not supported.
IR3892MTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- SupIRBuck®
- Package/Case:
- 31-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 1V
- Voltage - Input (Max):
- 21V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 18.06V
- Current - Output:
- 6A
- Frequency - Switching:
- 300kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 31-PQFN (5x6)
IR3892MTRPBF FAQ
1.How can I place an order for IR3892MTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3892MTRPBF 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 IR3892MTRPBF reliable?
The price and inventory of IR3892MTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3892MTRPBF is usually 5 days.
3.What payment methods are accepted for IR3892MTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3892MTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3892MTRPBF?
IR3892MTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3892MTRPBF 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 IR3892MTRPBF?
For technical support, including IR3892MTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3892MTRPBF requirements.
6.How does Aetrix verify that IR3892MTRPBF is sourced from the original manufacturer or authorized distributors?
All IR3892MTRPBF 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 IR3892MTRPBF meets industry standards.
7.What is the process for return or replacement of IR3892MTRPBF?
All IR3892MTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3892MTRPBF, 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 IR3892MTRPBF part is unused and in its original packaging.
Return procedure for IR3892MTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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