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Infineon Technologies IR3839MTRPBF
- Part No.:
- IR3839MTRPBF
- Manufacturer:
- Infineon Technologies
- Package:
- 17-PowerVQFN
- Datasheet:
-
IR3839MTRPBF.pdf
- Description:
- IC REG BUCK ADJ 6A 17PQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,749
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Product details
Overview
IR3839MTRPBF from Infineon Technologies is a highly integrated 6A synchronous buck regulator with internal high- and low-side MOSFETs, programmable 225–1650 kHz switching frequency, 0.6–0.9×Vin output voltage range, and integrated LDO bias supply. It delivers accurate power for low-voltage point-of-load applications in telecom and data center systems.
For engineers reviewing the IR3839MTRPBF datasheet, IR3839MTRPBF pinout, IR3839MTRPBF application, or IR3839MTRPBF equivalent, key selection factors include its programmable current limit via OCset pin, pre-bias startup capability, PGood tracking function, and thermal shutdown with 140°C trip point.
Technical Context
The IR3839MTRPBF implements a voltage-mode PWM controller with internal error amplifier, digital soft-start, and external synchronization input. Its feedback loop uses an inverting error amplifier (Fb) referenced to either Vref (for margining) or Vp (for tracking), enabling precise output regulation under dynamic load and input conditions.
Protection architecture includes hiccup-mode overcurrent triggered by OCset resistor, overvoltage detection on Fb, UVLO on Enable and Vcc/LDO_out, and thermal shutdown with 20°C hysteresis. The internal LDO supplies 4.7–5.7 V at up to 50 mA and can be bypassed when external 5 V bias is applied to Vcc/LDO_out.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Continuous 6 A - supports high-density PoL loads without external current sense or driver stages |
| Input Voltage Range | PVin = 1.5–16 V - compatible with 3.3 V, 5 V, and 12 V intermediate bus architectures |
| Output Voltage Range | 0.6 V to 0.9×Vin - enables stable 1.2 V, 1.8 V, 3.3 V, and 5.0 V rails from common input sources |
| Switching Frequency | 225–1650 kHz - adjustable via Rt resistor; allows optimization of size vs. efficiency and EMI performance |
| Efficiency | Up to 96% at 12 VIN/1.8 VOUT/6 A - achieved via low RDS(on) top/bottom FETs (22.5/14.1 mΩ typ) |
| Thermal Shutdown | 140°C junction trip with 20°C hysteresis - ensures safe operation during sustained overload or airflow loss |
| Power Good Accuracy | ±1% VFB threshold with 256/Fs delay - provides reliable rail sequencing and fault reporting in multi-rail systems |
Pinout & Package
IR3839MTRPBF is housed in a thermally enhanced 5 mm × 6 mm Power QFN package with 17-pin layout and 0.9 mm profile, optimized for high-current density PCB layouts and thermal dissipation via exposed PGnd pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Fb | Inverting error amplifier input | Connects to output divider; sets regulated voltage and enables closed-loop stability with external compensation network |
| Vref | External reference input | Enables output voltage margining; PGood tracks Vref during margining to confirm compliance |
| Comp | Error amplifier output | Drives external RC compensation network between Comp and Fb to stabilize control loop dynamics |
| Rt | Oscillator frequency set | Resistor to Gnd programs switching frequency from 225 kHz to 1650 kHz with ±5% tolerance |
| OCset | Current limit threshold | Resistor from OCset to SW sets peak inductor current limit; triggers hiccup-mode protection on overcurrent |
| PGood | Open-drain status output | Asserts high when output is within ±10% of target; tracks Fb or Vp depending on configuration |
| Sync | External clock input | Accepts TTL/CMOS clock 20% above free-running frequency for system-level switching synchronization |
| Boot | High-side gate driver supply | 100 nF capacitor to SW provides floating bias for top FET gate drive; supports 4.5–7.5 V boot-to-SW differential |
| Enable | Startup control input | UVLO thresholds (1.2 V start / 0.85 V stop) allow precise input voltage sequencing and brownout protection |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFET drivers + bootstrap diode | Eliminates need for external gate drivers or discrete bootstrap components; reduces BOM count and layout area |
| Internal digital soft-start | 10 ms fixed delay with 0.2 mV/µs ramp rate prevents inrush current and ensures monotonic startup into pre-biased loads |
| Pre-bias startup support | Allows safe turn-on when output capacitor is pre-charged; avoids reverse current flow through low-side FET body diode |
| Tracking input (Vp) | Enables output voltage to follow another rail (e.g., core voltage tracking I/O voltage); supports dual-rail sequencing |
| Pin compatibility with 10A/14A variants | Same footprint as IR384x family - enables scalable power design with minimal PCB redesign across current ratings |
Applications
| Telecom Point-of-Load | Data Center ASIC Supply |
|---|---|
Use Scenario: Regulating 1.8 V supply for FPGA I/O banks in 400G line cards with tight space constraints and airflow-limited environments. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 6 A continuous current with programmable frequency to avoid noise coupling into SerDes lanes. Use Value: 96% peak efficiency at full load reduces thermal load on adjacent optics modules and eliminates need for heatsinks in 1RU chassis. | Use Scenario: Powering CPU memory interface (DDR4/5 VDDQ) requiring fast transient response and voltage margining for validation testing. IC Role / Device Role / Timing Role: Marginable PoL regulator with Vref pin and PGood tracking, supporting ±5% voltage sweeps during system bring-up and stress testing. Use Value: Internal soft-start and pre-bias startup ensure clean power-up without disrupting memory initialization sequence or causing bus contention. |
| Distributed Telecom Power | Industrial Edge AI Module |
Use Scenario: Generating isolated 3.3 V rail from 48 V intermediate bus in remote radio units using secondary-side regulation. IC Role / Device Role / Timing Role: Secondary-side synchronous buck with Sync input synchronized to primary-side controller to reduce EMI and improve system-level timing predictability. Use Value: 1650 kHz max switching frequency enables use of compact 1.0 µH inductors, reducing solution size by >30% versus 500 kHz alternatives. | Use Scenario: Supplying 1.2 V core voltage to edge AI SoC with strict thermal limits and requirement for rail sequencing with GPU and memory. IC Role / Device Role / Timing Role: Tracking buck regulator using Vp input to follow 1.8 V I/O rail, ensuring correct voltage ordering during power-up and sleep/wake transitions. Use Value: Integrated thermal shutdown (140°C) and hiccup-mode OCP prevent latch-up during intermittent thermal throttling events in fanless enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z | 3A rated, fixed 2 MHz switching, no Vref margining or tracking input, smaller 3×3 mm QFN | Suitable only for lower-current, non-margining applications where board space is critical | Select when cost and footprint are prioritized over programmability and 6 A capability |
| TPS546B24RVFT | 6A PMBus-enabled buck with digital telemetry, 4.5–18 V input, but larger 6×6 mm QFN and higher BOM cost | Required where real-time telemetry, fault logging, or dynamic voltage scaling via I²C is needed | Select when digital control and monitoring outweigh analog simplicity and lower unit cost |
Compared with MP2451DT-LF-Z and TPS546B24RVFT, IR3839MTRPBF uniquely balances analog programmability (Rt, OCset, Vref), thermal robustness (140°C shutdown), and pin-compatible scalability-making it optimal for cost-sensitive, high-reliability telecom and data center PoL designs without digital overhead.
Availability
IR3839MTRPBF is available at Aetrix Electronics and suitable for telecom infrastructure, data center server boards, and distributed point-of-load power architectures requiring stable component supply, long lifecycle support, and RoHS-compliant packaging.
Supply support for IR3839MTRPBF 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 leader specializing in power management, automotive, and industrial control ICs, with global manufacturing and quality certification to ISO 9001 and IATF 16949.
The SupIRBuck™ product line delivers fully integrated, high-current DC/DC regulators targeting space-constrained, thermally demanding point-of-load applications in networking, computing, and 5G infrastructure.
FAQ
What is the minimum recommended output capacitance for stable operation at 6 A load?
The datasheet specifies ≥220 µF total output capacitance with ≤10 mΩ ESR for 1.8 V output at 6 A. This ensures <1% output voltage deviation during 1 A/µs load transients and maintains phase margin above 45° with standard ceramic+polymer hybrid configurations.
Can the IR3839MTRPBF operate without an external bootstrap capacitor?
No. A 100 nF ceramic capacitor must be placed between Boot and SW pins to provide gate drive voltage for the high-side MOSFET. Omitting it causes immediate failure of high-side switching and unregulated output collapse due to insufficient VGS on the top FET.
How does the OCset pin determine current limit threshold?
OCset sets peak inductor current via a resistor to SW: ILIM = 100 mV / ROCSET. For example, a 10 kΩ resistor yields 10 A limit (100 mV / 10 kΩ = 10 A). The device then enters hiccup mode after 4096 cycles of overcurrent detection.
Is the Vref pin required for basic regulation, or only for margining?
Vref is optional for basic regulation. When left floating, the internal 0.6 V reference is used. Vref becomes active only when externally driven (e.g., DAC output) to enable voltage margining; PGood then tracks Vref instead of Fb to validate margining accuracy.
IR3839MTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- SupIRBuck®
- Package/Case:
- 17-PowerVQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 7V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 14.4V
- Current - Output:
- 6A
- Frequency - Switching:
- 225kHz ~ 1.65MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 17-PQFN (5x6)
IR3839MTRPBF FAQ
1.How can I place an order for IR3839MTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3839MTRPBF 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 IR3839MTRPBF reliable?
The price and inventory of IR3839MTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3839MTRPBF is usually 5 days.
3.What payment methods are accepted for IR3839MTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3839MTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3839MTRPBF?
IR3839MTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3839MTRPBF 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 IR3839MTRPBF?
For technical support, including IR3839MTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3839MTRPBF requirements.
6.How does Aetrix verify that IR3839MTRPBF is sourced from the original manufacturer or authorized distributors?
All IR3839MTRPBF 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 IR3839MTRPBF meets industry standards.
7.What is the process for return or replacement of IR3839MTRPBF?
All IR3839MTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3839MTRPBF, 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 IR3839MTRPBF part is unused and in its original packaging.
Return procedure for IR3839MTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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