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Infineon Technologies IR3810MTRPBF
- Part No.:
- IR3810MTRPBF
- Manufacturer:
- Infineon Technologies
- Package:
- 15-PowerVQFN
- Datasheet:
-
IR3810MTRPBF.pdf
- Description:
- IC REG BUCK ADJ 12A PQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,958
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Product details
Overview
IR3810MTRPBF from Infineon Technologies is a highly integrated synchronous buck regulator with integrated high- and low-side MOSFETs, delivering up to 12A continuous output current, 0.6V reference accuracy (±1.5%), 600kHz fixed switching frequency, and wide 2.5V–21V input range. It serves as a point-of-load voltage regulator in DDR memory termination (VTT) and core power delivery for graphics cards and server VRMs.
For engineers reviewing the IR3810MTRPBF datasheet, IR3810MTRPBF pinout, IR3810MTRPBF application, or IR3810MTRPBF equivalent, key selection criteria include programmable hiccup over-current protection, pre-bias start-up capability, thermal shutdown with 20°C hysteresis, and tracking support for VTT generation in multi-rail memory subsystems.
Technical Context
The IR3810MTRPBF implements voltage-mode PWM control with a fixed 600kHz oscillator and internal error amplifier (1.3mS transconductance), using RDS(on) current sensing on the low-side MOSFET for lossless over-current detection. Its dual-supply architecture separates VCC (4.5–14V) for logic/driver bias and VC (up to 28V) for high-side gate charge pump.
It supports three operating modes: standalone regulation (Vref tied to Vp), tracking mode (Vp driven by master rail), and shutdown via SS/SD pin <0.25V. The error amplifier features 0.2–1.0V common-mode input range, ±4.5mV offset, and 15–28μA soft-start current for controlled ramp-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 21V - supports wide-input industrial and computing rails including 12V and 19V adapter inputs. |
| Output Voltage Range | 0.6V to 12V - enables DDR3/4 VDDQ, VTT, and CPU/GPU core regulation with 0.6V precision reference. |
| Continuous Output Current | 12A - rated under thermal constraints; validated at 12A, 1.8V out, 12V in, 0.6μH inductor. |
| Switching Frequency | 600kHz (540–660kHz) - enables compact magnetics and ceramic output capacitors without audible noise. |
| Reference Voltage Accuracy | ±1.5% (–40°C to +105°C) - ensures tight output regulation across temperature for memory interface compliance. |
| Thermal Shutdown Threshold | 140°C with 20°C hysteresis - provides self-recovery fault protection during sustained overload or airflow loss. |
| Soft-Start Current | 15–28μA - sets ramp time via external capacitor; enables precise control of inrush into pre-biased outputs. |
Pinout & Package
IR3810MTRPBF uses a thermally enhanced 15-pin 5mm × 6mm Power QFN package with exposed thermal pad (PGnd-connected) and three AGnd pins for noise isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 Vp | Non-inverting error amp input | Accepts external reference for tracking mode (e.g., DDR VREF); sets output voltage when floating in standalone mode. |
| 2 Fb | Inverting error amp input | Connects to output divider; compares against internal 0.6V reference to regulate output voltage. |
| 3 Comp | Error amplifier output | Drives external RC compensation network to stabilize loop response and prevent oscillation. |
| 4,5,15 AGnd | Analog ground | Common return for reference, error amp, and feedback circuitry; must be isolated from PGnd to minimize noise coupling. |
| 6 SS/SD | Soft-start/shutdown control | Pull below 0.25V to disable converter; capacitor-to-ground sets startup time; enables sequencing in multi-rail systems. |
| 7 OCSet | Over-current threshold set | Resistor to SW pin programs hiccup current limit; eliminates need for external sense resistor. |
| 8 VCC | Logic & low-side driver supply | Must be decoupled with ≥0.1μF ceramic cap to PGnd; UVLO triggers at 3.7–4.4V. |
| 9 Vref | External reference output | 2μA drive capability; tied to Vp for 0.6V regulation or left floating for tracking applications. |
| 10 PGnd | Power ground | Return path for MOSFET drivers and inductor; connects to thermal pad and system power plane. |
| 11 SW | Switch node | Connects to inductor and OCSet resistor; carries high di/dt; requires tight layout to minimize EMI. |
| 12 VIN | Main input supply | Accepts 2.5–21V; feeds high-side driver via VC charge pump and powers internal logic via VCC LDO. |
| 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 + 5V (up to 28V); UVLO at 2.85–3.5V; decoupled with ≥0.1μF ceramic to PGnd. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual MOSFETs | Top/bottom RDS(on) = 6.9–8.7mΩ each at 25°C - eliminates discrete FET selection, reduces BOM count and layout area. |
| Pre-bias start-up | Starts safely into pre-charged output without reverse current or oscillation - critical for hot-swap and multi-phase sequencing. |
| Programmable hiccup OCP | Current limit set by resistor from OCSet to SW - avoids latch-off during transient overload; enables auto-recovery. |
| Tracking capability | Vp accepts external voltage (e.g., DDR VREF) to generate matched VTT - eliminates separate tracking IC in memory modules. |
| Thermally enhanced QFN | 5mm × 6mm footprint with exposed PGnd pad - achieves ≤3.5°C/W θJA with 2oz copper and 4 thermal vias. |
Applications
| DDR Memory Termination (VTT) | GPU Core Power Supply |
|---|---|
|
Use Scenario: Regulating DDR3/DDR4 termination voltage (VTT) referenced to VREF in server DIMMs and graphics modules. IC Role / Device Role / Timing Role: Tracking regulator synchronized to master VREF rail; delivers ±1% VTT = 0.5×VREF with fast transient response. Use Value: Eliminates discrete op-amp + pass-FET solution; reduces board area by 40% and improves VTT accuracy over temperature. |
Use Scenario: Providing 0.8–1.2V core power to discrete GPUs in workstations and gaming PCs. IC Role / Device Role / Timing Role: High-current synchronous buck converter with 12A capability and 600kHz switching for compact VRM design. Use Value: Supports rapid load steps up to 8A/μs with <5% droop; integrated MOSFETs reduce conduction losses vs. controller+discrete solutions. |
| Server Point-of-Load (POL) | Embedded System I/O Rail |
|
Use Scenario: Distributed 1.8V or 3.3V power for ASICs, FPGAs, and PCIe switches in 1U rack servers. IC Role / Device Role / Timing Role: Standalone POL regulator with programmable soft-start and UVLO for reliable hot-plug operation. Use Value: Enables single-rail sequencing without external supervisors; hiccup OCP prevents bus collapse during short-circuit events. |
Use Scenario: Generating stable 1.2V or 1.8V I/O supply for ARM-based industrial controllers and edge AI modules. IC Role / Device Role / Timing Role: Wide-input (2.5–21V) buck regulator supporting 12V or 24V backplane inputs in harsh environments. Use Value: Operates down to –40°C with guaranteed ±1.5% reference accuracy; thermal shutdown protects against enclosure overheating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP8765GQ-Z | 6A max output, 2.5–18V input, 500kHz switching, no tracking pin; requires external current sense resistor. | Lacks Vp/Vref tracking capability and hiccup OCP; suitable only for non-DDR, lower-current POLs. | Select when cost sensitivity outweighs DDR support and 12A requirement. |
| TPS544B20RTWT | 15A output, 4.5–18V input, 300–1200kHz programmable frequency, PMBus interface, no integrated high-side FET. | Requires external high-side MOSFET and complex loop compensation; adds PMBus overhead for telemetry. | Select when digital monitoring, higher current, or frequency flexibility justify added complexity and BOM cost. |
Compared with MP8765GQ-Z and TPS544B20RTWT, IR3810MTRPBF uniquely integrates both MOSFETs, supports VTT tracking without external components, and delivers 12A in a 5×6mm QFN-making it optimal for space-constrained DDR and GPU power where analog simplicity and thermal performance are prioritized.
Availability
IR3810MTRPBF is available at Aetrix Electronics and suitable for server point-of-load, DDR memory termination, and GPU core power applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for IR3810MTRPBF 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 and GaN-based power conversion solutions.
The IR3810 belongs to Infineon's SupIRBuck™ family of fully integrated DC/DC regulators, designed specifically for high-efficiency, low-footprint point-of-load power delivery in computing, graphics, and memory subsystems.
FAQ
What is the minimum input voltage required for reliable operation of IR3810MTRPBF?
The absolute minimum input voltage is 2.5V, but stable regulation requires VCC ≥4.5V and VC ≥VIN + 5V. For 12V output, VIN must be ≥12.5V to satisfy VC supply constraint. Operation below 4.5V on VCC will trigger UVLO and disable switching.
Can IR3810MTRPBF be used without an external compensation network on the COMP pin?
No. The COMP pin is the error amplifier output and requires an external RC network (typically 1–10kΩ + 1–10nF) to ground for loop stability. Omitting compensation causes oscillation or poor transient response, as confirmed in the block diagram and Fig.3 of the datasheet.
How does the hiccup over-current protection behave during sustained overload?
When OCSet threshold is exceeded, the device enters hiccup mode: switching stops for ~6.7ms, then attempts restart. Each cycle delivers ~3μA average current to OCSet, resulting in ~15% duty cycle. This limits average power dissipation and prevents thermal runaway.
Is the AGnd pin electrically isolated from PGnd inside the IC?
Yes. Internal isolation between AGnd (pins 4,5,15) and PGnd (pin 10) is maintained per the absolute maximum rating "AGnd to PGnd –0.3V to +0.3V". They must be connected externally only at a single-point star ground to avoid ground loops and reference noise coupling.
IR3810MTRPBF 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)
IR3810MTRPBF FAQ
1.How can I place an order for IR3810MTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3810MTRPBF 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 IR3810MTRPBF reliable?
The price and inventory of IR3810MTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3810MTRPBF is usually 5 days.
3.What payment methods are accepted for IR3810MTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3810MTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3810MTRPBF?
IR3810MTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3810MTRPBF 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 IR3810MTRPBF?
For technical support, including IR3810MTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3810MTRPBF requirements.
6.How does Aetrix verify that IR3810MTRPBF is sourced from the original manufacturer or authorized distributors?
All IR3810MTRPBF 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 IR3810MTRPBF meets industry standards.
7.What is the process for return or replacement of IR3810MTRPBF?
All IR3810MTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3810MTRPBF, 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 IR3810MTRPBF part is unused and in its original packaging.
Return procedure for IR3810MTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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