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Infineon Technologies IR3839MTR1PBF
- Part No.:
- IR3839MTR1PBF
- Manufacturer:
- Infineon Technologies
- Package:
- 17-VQFN
- Datasheet:
-
IR3839MTR1PBF.pdf
- Description:
- IC REG BUCK ADJ 6A 17PQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,734
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Product details
Overview
IR3839MTR1PBF from Infineon Technologies is a highly integrated 6A synchronous buck regulator with internal PWM controller, high-side and low-side MOSFETs, bootstrap diode, and LDO. It delivers regulated output from 0.6V to 0.9×Vin across 1.5–16V input, supports programmable 225–1650kHz switching, and enables precise margining via Vref pin in telecom and data center point-of-load systems.
For engineers reviewing the IR3839MTR1PBF datasheet, IR3839MTR1PBF pinout, IR3839MTR1PBF application, or IR3839MTR1PBF equivalent, key selection criteria include its 6A continuous load capability, hiccup-mode overcurrent protection, pre-bias startup, thermal shutdown, and compatibility with external synchronization and tracking functions.
Technical Context
The IR3839 implements a voltage-mode PWM control architecture with an internal error amplifier (100–120dB DC gain, 20–40MHz GBWP), digitally controlled soft-start (168–254kHz clock, 0.2mV/μs ramp), and dual-path feedback: standard resistor-divider (Fb) and external reference (Vref) for margining. Its oscillator uses an external Rt resistor to set frequency with ±10% tolerance.
Protection logic includes cycle-by-cycle current limiting via OCset pin (68–86μA threshold at 1.5MHz), thermal shutdown at 140°C with 20°C hysteresis, UVLO on Vcc (4.06–4.46V start) and Enable (1.14–1.36V start), and PGood monitoring with 256/Fs delay and ±15% output voltage window tracking both Vref and Vp inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Continuous 6A load capability ensures stable power delivery for mid-power ASICs and FPGAs. |
| Input Voltage Range | 1.5V to 16V PVin enables use with 3.3V, 5V, and 12V intermediate bus architectures. |
| Output Voltage Range | 0.6V to 0.9×Vin supports core voltages down to sub-1V while maintaining regulation margin. |
| Switching Frequency | Programmable 225–1650kHz via Rt resistor allows EMI optimization and inductor size trade-offs. |
| Efficiency | Up to 96% at 12VIN/1.8VOUT/6A enables thermally constrained PCB layouts. |
| Junction Temp Range | –40°C to +125°C operation suits industrial and telecom environments without derating. |
| Package | 5mm × 6mm PQFN-17 with 0.9mm height provides high power density and thermal performance. |
Pinout & Package
IR3839MTR1PBF is housed in a 5mm × 6mm Power QFN package with 17 pins and 0.9mm profile, featuring exposed thermal pad for enhanced heat dissipation. Pin numbering follows top-view layout with dedicated PGnd and Gnd separation for noise isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Fb (Pin 1) | Inverting input of error amplifier | Connects to output divider to set regulated voltage; determines loop stability with Comp network. |
| Vref (Pin 2) | External reference input | Enables output voltage margining; PGood tracks Vref during margining sequences. |
| Comp (Pin 3) | Error amplifier output | Interface for external RC compensation network to tune transient response and phase margin. |
| Rt (Pin 5) | Oscillator frequency set | Resistor-to-GND sets switching frequency; 59kΩ yields ~250kHz, 9.53kΩ yields ~1.5MHz. |
| OCset (Pin 6) | Current limit threshold | Resistor from OCset to SW sets peak inductor current limit; calibrated per switching frequency. |
| PGood (Pin 7) | Open-drain status output | Asserts high when output is within ±15% of target; tracks either Vref or Vp depending on configuration. |
| Sync (Pin 8) | External clock input | Accepts TTL/CMOS sync signal ≥20% above free-running frequency for system-wide timing alignment. |
| Vin (Pin 9) | LDO input supply | Provides bias for internal LDO; left floating if external 5V applied to Vcc/LDO_out. |
| Vcc/LDO_out (Pin 10) | Internal LDO output | Supplies 4.7–5.7V to control circuitry; bypassed when external bias is used. |
| PGnd (Pin 11) | Power ground return | Separate ground for MOSFET drivers to minimize switching noise coupling into control circuitry. |
| SW (Pin 12) | Switch node | Connects to inductor; carries high dv/dt switching waveform; requires tight layout to reduce EMI. |
| PVin (Pin 13) | Main power input | High-current input for power stage; decoupled with 1μF capacitor to PGnd. |
| Boot (Pin 14) | High-side gate driver supply | 100nF capacitor to SW generates floating bias for upper MOSFET gate drive. |
| Enable (Pin 15) | Startup control | UVLO-enabled enable with 1.14–1.36V rising threshold; supports resistor-divider input monitoring. |
| Vp (Pin 16) | Tracking reference input | Allows output to track another voltage rail; used in multi-rail sequencing applications. |
| Gnd (Pins 4 & 17) | Signal ground | Reference for error amplifier, oscillator, and logic; kept separate from PGnd for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFET drivers + bootstrap diode | Eliminates need for external high-side gate driver and discrete bootstrap diode, reducing BOM count and layout area. |
| Pre-bias startup capability | Allows safe turn-on into pre-charged output capacitors without reverse current flow or output overshoot. |
| Internal digital soft-start | Programmable 10ms delay with linear 0.2mV/μs ramp prevents inrush current and stabilizes output during power-up. |
| Enhanced PGood with tracking | Monitors output against either Vref (for margining) or Vp (for tracking), with configurable thresholds and 256/Fs response delay. |
| Hiccup-mode overcurrent protection | Shuts down on fault, waits 4096 cycles, then retries-prevents thermal runaway while enabling automatic recovery. |
Applications
| Telecom Line Cards | Data Center ASIC Power |
|---|---|
Use Scenario: Powering FPGA, DSP, or SerDes cores on carrier-grade line cards with strict thermal and reliability requirements. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering 1.2V/1.8V/3.3V from 12V intermediate bus with fast transient response. Use Value: 96% efficiency at full load reduces board-level heat density; hiccup protection ensures uptime during short-circuit events. | Use Scenario: Supplying memory I/O or CPU auxiliary rails in high-density server motherboards with limited PCB real estate. IC Role / Device Role / Timing Role: Compact, integrated buck converter replacing discrete controller+MOSFET solutions to save space and simplify design. Use Value: 5mm×6mm PQFN footprint enables dense placement near loads; programmable frequency avoids sensitive EMI bands. |
| Distributed PoL in Networking Switches | Industrial Control Unit Power |
Use Scenario: Regulating multiple independent rails (e.g., 1.2V core, 3.3V I/O, 5V analog) across modular switch fabric boards. IC Role / Device Role / Timing Role: Configurable regulator supporting tracking (via Vp), margining (via Vref), and synchronization (via Sync) across rails. Use Value: Single-supply operation with internal LDO simplifies biasing; Vp/Vref flexibility supports complex power sequencing. | Use Scenario: Providing reliable 1.8V or 2.5V supply to microcontrollers and sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Robust DC/DC regulator with –40°C to +125°C operation and thermal shutdown for harsh ambient conditions. Use Value: Pre-bias startup prevents malfunction during hot-swap events; wide input range accommodates unregulated 12V/24V field supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2315GJ-Z | 4A rated, smaller 3mm×3mm QFN, no Vref margining or Vp tracking inputs | Suitable for cost-sensitive, lower-current applications without advanced sequencing needs | Select when output current ≤4A and margining/tracking features are unnecessary. |
| TPS546B24RVFT | 6A PMBus-enabled digital regulator with telemetry, higher pin count, and external compensation | Required where digital monitoring, dynamic voltage scaling, or firmware-configurable parameters are needed | Select when system demands telemetry, adaptive loop tuning, or remote configuration via PMBus. |
Compared with MP2315GJ-Z and TPS546B24RVFT, IR3839MTR1PBF offers balanced integration-retaining analog simplicity and margining/tracking capability without digital overhead-making it optimal for analog-controlled, high-reliability PoL designs where 6A output and thermal robustness are critical.
Availability
IR3839MTR1PBF is available at Aetrix Electronics and suitable for telecom line cards, data center ASIC power, distributed PoL in networking switches, and industrial control unit power requiring stable component supply and long-term manufacturability.
Supply support for IR3839MTR1PBF 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 certifications including ISO/TS 16949 and AEC-Q100.
The IR3839 belongs to Infineon's SupIRBuck™ family of integrated POL regulators, designed specifically for high-efficiency, space-constrained point-of-load conversion in telecom infrastructure and enterprise computing equipment.
FAQ
What is the minimum recommended output capacitance for stable operation?
The IR3839MTR1PBF requires a minimum 22μF ceramic output capacitor with ≤5mΩ ESR for stable regulation across 0.6–5.0V outputs. Typical designs use parallel 22μF + 100μF low-ESR tantalum or polymer capacitors to meet transient response and ripple specifications under 6A load steps.
Can the internal LDO be disabled and replaced with an external 5V bias?
Yes-the internal LDO can be bypassed by applying a regulated 4.5–6.5V supply directly to the Vcc/LDO_out pin (Pin 10) and leaving Vin (Pin 9) floating. This reduces power loss and improves efficiency when an external clean 5V rail is available.
How does the OCset pin determine current limit threshold?
The OCset pin senses voltage across a resistor connected between OCset and SW. At 1.5MHz switching, a 68–86μA current flows into OCset, generating a voltage drop that sets the peak inductor current limit. The exact threshold scales inversely with switching frequency per datasheet curves.
Is the IR3839MTR1PBF RoHS-compliant and lead-free?
Yes-IR3839MTR1PBF is lead-free, halogen-free, and fully RoHS-compliant per EU Directive 2011/65/EU. It meets JEDEC moisture sensitivity level 2 (MSL2) at 260°C and carries the "PbF" suffix confirming compliance.
IR3839MTR1PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- SupIRBuck®
- Package/Case:
- 17-VQFN
- 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)
IR3839MTR1PBF FAQ
1.How can I place an order for IR3839MTR1PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3839MTR1PBF 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 IR3839MTR1PBF reliable?
The price and inventory of IR3839MTR1PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3839MTR1PBF is usually 5 days.
3.What payment methods are accepted for IR3839MTR1PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3839MTR1PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3839MTR1PBF?
IR3839MTR1PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3839MTR1PBF 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 IR3839MTR1PBF?
For technical support, including IR3839MTR1PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3839MTR1PBF requirements.
6.How does Aetrix verify that IR3839MTR1PBF is sourced from the original manufacturer or authorized distributors?
All IR3839MTR1PBF 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 IR3839MTR1PBF meets industry standards.
7.What is the process for return or replacement of IR3839MTR1PBF?
All IR3839MTR1PBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3839MTR1PBF, 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 IR3839MTR1PBF part is unused and in its original packaging.
Return procedure for IR3839MTR1PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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