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Infineon Technologies IR3810MTR1PBF
- Part No.:
- IR3810MTR1PBF
- Manufacturer:
- Infineon Technologies
- Package:
- 15-PowerVQFN
- Datasheet:
-
IR3810MTR1PBF.pdf
- Description:
- IC REG BUCK ADJ 12A PQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,327
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Product details
Overview
IR3810MTR1PBF from Infineon Technologies is a highly integrated synchronous buck regulator with 12A continuous output current, 2.5V–21V input range, and 0.6V–12V programmable output voltage. It integrates high- and low-side MOSFETs (RDS(on) = 6.9–8.7 mΩ each), operates at fixed 600 kHz, and delivers precision regulation for DDR memory termination (VTT) and core logic rails in computing and storage systems.
For engineers reviewing the IR3810MTR1PBF datasheet, IR3810MTR1PBF pinout, IR3810MTR1PBF application, or IR3810MTR1PBF equivalent, key selection criteria include its thermally enhanced 5mm × 6mm QFN package, hiccup-mode over-current protection, pre-bias start-up capability, and tracking support for multi-rail memory subsystems.
Technical Context
The IR3810MTR1PBF implements voltage-mode PWM control with a fixed 600 kHz oscillator and internal error amplifier (transconductance: 1000–1600 µmho). Feedback uses a precision 0.6 V reference and supports external tracking via the Vp pin, enabling VTT generation synchronized to master VDDQ rails.
Over-current protection senses low-side MOSFET RDS(on) without external sense resistors; current limit is set by an external resistor on OCSet. Thermal shutdown activates at 140°C with 20°C hysteresis, and under-voltage lockout monitors both VCC (4.0–4.4 V turn-on) and VC (3.1–3.5 V turn-on) supplies independently.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 21 V - supports wide-input industrial and server power rails including 12 V and 19 V intermediate buses. |
| Output Current | 12 A continuous - enables single-chip point-of-load regulation for CPU I/O, GPU memory, and DDR4/5 VTT rails. |
| Switching Frequency | 600 kHz (±10%) - allows compact 0.6 µH inductors and reduces EMI filtering burden versus lower-frequency alternatives. |
| Reference Voltage | 0.6 V ±1.5% (−40°C to +105°C) - ensures tight output accuracy for sub-1 V core supplies and DDR termination voltages. |
| MOSFET RDS(on) | 6.9–8.7 mΩ (top & bottom, 25°C) - minimizes conduction loss at 12 A, supporting >90% efficiency at 1.8 V/12 A with proper layout. |
| Soft-Start Control | Programmable via external capacitor on SS pin - prevents inrush current during power-up into pre-biased outputs. |
| Thermal Shutdown | 140°C trip, 20°C hysteresis - protects against sustained overload or poor heatsinking without latch-up. |
Pinout & Package
IR3810MTR1PBF is housed in a thermally enhanced 15-pin 5 mm × 6 mm Power QFN package with exposed thermal pad (PGnd-connected) for PCB-level heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 Vp | Non-inverting error amp input | Accepts external tracking voltage (e.g., VDDQ) to generate matched VTT; sets reference when tied to Vref. |
| 2 Fb | Inverting error amp input | Connects to output divider; compares regulated output to internal 0.6 V reference for closed-loop control. |
| 3 Comp | Error amplifier output | Drives external RC compensation network to stabilize loop response across load and line variations. |
| 4,5,15 AGnd | Analog ground | Common reference for internal bias, error amp, and feedback circuitry; must be isolated from PGnd. |
| 6 SS/SD | Soft-start/shutdown | Pull <0.25 V to disable regulator; external capacitor sets monotonic output ramp time. |
| 7 OCSet | Current limit programming | Resistor to SW pin sets over-current threshold; enables precise, resistor-adjustable hiccup-mode protection. |
| 8 VCC | Low-side driver supply | Powers internal logic and low-side gate driver; requires ≥0.1 µF ceramic cap to PGnd. |
| 9 Vref | External reference output | 2 µA drive capability; connects to Vp for standalone 0.6 V regulation or floats for tracking mode. |
| 10 PGnd | Power ground | Return path for MOSFET drivers and high-current paths; must connect to system power plane, not AGnd. |
| 11 SW | Switch node | Connects to inductor; carries high di/dt switching current; critical for EMI and layout integrity. |
| 12 VIN | Main input supply | Accepts 2.5–21 V; powers high-side driver via charge pump and internal regulators. |
| 13 HG | High-side gate driver output | Drives high-side MOSFET gate; requires small capacitor to SW for bootstrap operation. |
| 14 VC | High-side driver supply | Must be ≥VIN + 5 V (up to 28 V); powers charge pump; requires ≥0.1 µF ceramic cap to PGnd. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual MOSFETs | Eliminates discrete FET selection and layout complexity while maintaining 6.9–8.7 mΩ RDS(on) performance. |
| Pre-bias start-up | Enables safe power-on into charged output capacitors without oscillation or reverse current flow. |
| Tracking capability | Vp pin accepts external master rail (e.g., DDR VDDQ) to generate precisely tracked VTT without external op-amps. |
| Hiccup-mode OCP | Self-resetting fault response limits average power during short-circuit events, improving system reliability. |
| Thermally enhanced QFN | 5 mm × 6 mm footprint with exposed thermal pad achieves <1.5°C/W θJA with 2 oz copper and 4 thermal vias. |
Applications
| DDR Memory Termination (VTT) | GPU Core Voltage Regulation |
|---|---|
|
Use Scenario: Generating matched termination voltage for DDR4/DDR5 memory interfaces where VTT must track VDDQ within ±1%. IC Role / Device Role / Timing Role: Synchronous buck regulator operating in tracking mode, using Vp as master reference and Fb for closed-loop regulation. Use Value: Eliminates external op-amp tracking circuits and reduces BOM count while maintaining ±1.5% output accuracy over temperature. |
Use Scenario: Delivering stable 0.8–1.2 V at up to 12 A to GPU core logic in graphics cards and AI accelerators. IC Role / Device Role / Timing Role: Primary point-of-load regulator with fast transient response enabled by 600 kHz switching and integrated MOSFETs. Use Value: Supports rapid load steps typical of GPU workloads without requiring oversized output capacitance. |
| Server CPU I/O Rail | Industrial Embedded Computing |
|
Use Scenario: Powering CPU I/O buffers and PCIe interface rails in 1U servers requiring high density and thermal resilience. IC Role / Device Role / Timing Role: High-efficiency buck converter with thermal shutdown and hiccup OCP for unattended operation. Use Value: Maintains regulation under sustained 12 A loads at 65°C ambient with minimal derating due to low RDS(on) and thermal QFN package. |
Use Scenario: Providing reliable 3.3 V or 5 V power to FPGA, microcontroller, and peripheral ICs in fanless industrial controllers. IC Role / Device Role / Timing Role: Standalone regulator configured with fixed 0.6 V reference and resistor-divider feedback. Use Value: Delivers stable output despite wide input variation (e.g., 9–36 V DC input) and harsh thermal environments. |
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 max output, 4.5–28 V input, no integrated high-side MOSFET, requires external FETs | Suitable for lower-current distributed loads; lacks tracking, pre-bias start-up, and hiccup OCP | Select when cost sensitivity outweighs integration needs and current demand is ≤3 A. |
| TPS544B20RTWR | 15A output, 4.5–18 V input, PMBus interface, digital control, 3.5 mm × 3.5 mm QFN | Supports telemetry and dynamic voltage scaling; higher BOM cost and design complexity | Select when digital monitoring, adaptive voltage scaling, or tighter transient response is required. |
Compared with MP2451DT-LF-Z and TPS544B20RTWR, the IR3810MTR1PBF offers optimal balance of 12 A integration, analog simplicity, and memory-specific features like VTT tracking-making it ideal for cost-sensitive, high-density DDR and GPU power delivery without digital overhead.
Availability
IR3810MTR1PBF is available at Aetrix Electronics and suitable for DDR memory termination, GPU core regulation, and server CPU I/O rails requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for IR3810MTR1PBF 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, and industrial control ICs, with leadership in silicon-based power conversion solutions.
The IR3810 belongs to Infineon's SupIRBuck™ family-designed specifically for high-current, space-constrained point-of-load applications in computing, storage, and graphics infrastructure where integration, thermal performance, and memory rail compatibility are critical.
FAQ
What is the minimum recommended output capacitance for stable 12 A operation?
The IR3810MTR1PBF requires ≥330 µF total output capacitance with ≤5 mΩ ESR for stable 12 A operation at 1.2 V. This typically comprises three 100 µF/6.3 V X5R ceramic capacitors in parallel plus one 33 µF/6.3 V polymer capacitor to damp high-frequency ringing and improve transient response.
Can IR3810MTR1PBF operate with input voltage below 4.5 V?
Yes-the IR3810MTR1PBF supports input voltages as low as 2.5 V per absolute maximum ratings and electrical specifications. However, VCC UVLO remains active until VCC exceeds 4.0 V, so auxiliary biasing of VCC may be needed for inputs below 4.5 V to ensure startup.
How is the hiccup current limit threshold set?
The hiccup current limit is set by connecting a resistor between OCSet and SW pins. A 10 kΩ resistor yields ~20 µA OCSET current, corresponding to ~12 A current limit at 25°C. The relationship is linear and documented in the datasheet's OCSet vs. IOCSET curve.
Is the thermal pad electrically connected internally?
Yes-the exposed thermal pad on the IR3810MTR1PBF is internally connected to PGnd. It must be soldered to a dedicated PGnd copper area on the PCB with ≥4 thermal vias to maximize heat transfer and maintain junction temperature below 125°C at full load.
IR3810MTR1PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- SupIRBuck®
- Package/Case:
- 15-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):
- 2.5V
- Voltage - Input (Max):
- 21V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 12V
- Current - Output:
- 12A
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PQFN (5x6)
IR3810MTR1PBF FAQ
1.How can I place an order for IR3810MTR1PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3810MTR1PBF 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 IR3810MTR1PBF reliable?
The price and inventory of IR3810MTR1PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3810MTR1PBF is usually 5 days.
3.What payment methods are accepted for IR3810MTR1PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3810MTR1PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3810MTR1PBF?
IR3810MTR1PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3810MTR1PBF 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 IR3810MTR1PBF?
For technical support, including IR3810MTR1PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3810MTR1PBF requirements.
6.How does Aetrix verify that IR3810MTR1PBF is sourced from the original manufacturer or authorized distributors?
All IR3810MTR1PBF 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 IR3810MTR1PBF meets industry standards.
7.What is the process for return or replacement of IR3810MTR1PBF?
All IR3810MTR1PBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3810MTR1PBF, 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 IR3810MTR1PBF part is unused and in its original packaging.
Return procedure for IR3810MTR1PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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