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Infineon Technologies IR3822MTRPBF
- Part No.:
- IR3822MTRPBF
- Manufacturer:
- Infineon Technologies
- Package:
- 15-PowerVQFN
- Datasheet:
-
IR3822MTRPBF.pdf
- Description:
- IC REG BUCK ADJ 4A PQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,828
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Product details
Overview
IR3822MTRPBF from Infineon Technologies is a highly integrated synchronous buck regulator with internal high- and low-side MOSFETs, delivering up to 4A continuous output current across 0.6V–12V output range from a 2.5V–21V input. It operates at a fixed 600kHz switching frequency, features programmable soft-start, hiccup-mode over-current protection, and precision 0.6V reference voltage. Used in DDR memory power delivery and graphics card VRMs.
For engineers reviewing the IR3822MTRPBF datasheet, IR3822MTRPBF pinout, IR3822MTRPBF application, or IR3822MTRPBF equivalent, key selection criteria include its thermally enhanced 5mm×6mm QFN-15 package, pre-bias start-up capability, dual UVLO thresholds (VCC and VC), and integrated current-sense via RDS(on) of internal MOSFETs.
Technical Context
The IR3822MTRPBF implements voltage-mode PWM control with a fixed 600kHz oscillator and internal sawtooth ramp generator. Its error amplifier compares FB voltage against a 0.6V reference, driving trailing-edge modulated gate signals to internal N-channel MOSFETs without external timing components.
Current limiting uses RDS(on)-based sensing on the low-side FET, eliminating external sense resistors. Protection includes programmable OCSET threshold, thermal shutdown at 140°C (20°C hysteresis), and independent UVLO for VCC (4.4V turn-on) and VC (3.5V turn-on).
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 systems. |
| Output Voltage Range | 0.6V to 12V - enables DDR3/4 core voltage regulation and multi-rail system partitioning. |
| Continuous Output Current | 4A - sustained load capability with thermal derating per junction temperature and PCB layout. |
| Switching Frequency | 600kHz (±10%) - enables compact 1.5μH inductors and low-ESR ceramic output capacitors. |
| Reference Voltage Accuracy | ±1.5% (–40°C to +105°C) - ensures tight output regulation under thermal stress in embedded systems. |
| Thermal Shutdown Threshold | 140°C with 20°C hysteresis - provides self-recovery fault handling without latch-up during transient overload. |
| Soft-Start Current | 20μA typical - sets startup time via external capacitor; enables controlled inrush current management. |
Pinout & Package
Package: 5mm × 6mm Power QFN-15 with exposed thermal pad (PGnd-connected). Thermally enhanced for 4A operation in space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vsns | Power Good sense input | Connects to resistor divider to set PGood trip point at 0.38V nominal; enables precise output monitoring. |
| Fb | Error amplifier inverting input | Feedback node for output voltage regulation; referenced to 0.6V internal bandgap. |
| Comp | Error amplifier output | Drives PWM comparator; external compensation network sets loop stability. |
| AGnd | Analog ground (pins 4, 5, 15) | Common reference for internal reference, error amp, and feedback circuitry; must be star-connected. |
| SS/SD | Soft-start / shutdown control | Pull below 0.3V to disable regulator; capacitor-to-AGnd sets ramp time for controlled startup. |
| OCSet | Over-current threshold programming | Resistor from OCSet to SW sets current limit based on low-side RDS(on) sensing. |
| VCC | Bias supply for logic and low-side driver | Requires ≥0.1μF ceramic cap to PGnd; UVLO activates below 4.4V. |
| PGood | Open-drain status output | Active-low signal pulled up externally; indicates output within ±10% of target. |
| PGnd | Power ground | Separate return path for MOSFET drivers and inductor; minimizes noise coupling into AGnd. |
| SW | Switch node | Connection to output inductor and low-side FET source; high dv/dt node requiring tight layout. |
| VIN | Main input supply | Primary DC input rail (2.5V–21V); feeds high-side driver bootstrap via VC. |
| HG | High-side gate driver output | Drives high-side N-MOSFET gate; requires small capacitor to SW for bootstrap charging. |
| VC | Bootstrap supply for high-side driver | Must be ≥VIN + 5V; requires ≥0.1μF ceramic cap to PGnd; UVLO at 3.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated High- and Low-Side MOSFETs | Eliminates external power switches and reduces BOM count; RDS(on) = 18–23mΩ (top/bot) at 25°C. |
| Pre-Bias Start-Up | Enables safe startup into pre-charged outputs (e.g., DDR termination rails), avoiding reverse current or oscillation. |
| Programmable Hiccup Current Limit | Configurable trip point via OCSet resistor; enters timed restart mode instead of hard shutdown during overload. |
| Independent Dual UVLO | Separate VCC and VC undervoltage detection prevents partial operation and gate drive failure. |
| Thermally Enhanced QFN-15 | Exposed PGnd pad improves θJA; supports 4A continuous load with minimal heatsinking in 5mm×6mm footprint. |
Applications
| DDR Memory Power Delivery | Graphics Card VRM |
|---|---|
Use Scenario: Supplying 1.2V/1.35V DDR3/DDR4 VDDQ rails with fast transient response and tight regulation. IC Role / Device Role / Timing Role: Primary synchronous buck controller regulating memory I/O voltage with pre-bias startup support. Use Value: Integrated MOSFETs and 600kHz operation reduce solution size by >30% vs discrete controllers; 0.6V reference enables <±1% output accuracy. | Use Scenario: Delivering 0.8–1.2V GPU core voltage with dynamic load steps up to 4A/μs. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator with hiccup-mode OCP for robustness during GPU boost events. Use Value: Programmable soft-start and PGood enable coordinated power sequencing with GPU ASIC; thermal shutdown protects against fan-failure scenarios. |
| Server Point-of-Load | Embedded System Core Rail |
Use Scenario: Generating 1.8V or 3.3V auxiliary rails for server baseboard management controllers (BMC) and PCIe switch logic. IC Role / Device Role / Timing Role: Compact, self-contained buck regulator replacing multi-chip solutions in space-limited 1U chassis. Use Value: 5mm×6mm QFN-15 footprint saves >40% board area vs SOIC-8 alternatives; dual UVLO ensures reliable cold-start in datacenter environments. | Use Scenario: Powering ARM Cortex-A series SoCs in industrial HMIs and edge AI gateways requiring stable 1.0–1.2V core voltage. IC Role / Device Role / Timing Role: Main processor core regulator with programmable OCSET and thermal shutdown for unattended operation. Use Value: Pre-bias startup avoids brown-out during hot-plug events; ±1.5% reference accuracy maintains CPU performance across –40°C to +85°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2315DJ-LF-Z | 3A rated, 2.5V–36V input, 500kHz fixed frequency, no VC pin or bootstrap driver | Lacks high-side gate driver; requires external high-side switch or bootstrap diode | Choose when lower current (≤3A) and simpler topology suffice; not suitable for 4A DDR or GPU loads. |
| TPS544B20RTWR | 4A, 4.5V–18V input, 600kHz, integrated FETs, but uses current-mode control and PMBus interface | Supports digital configuration and telemetry; larger 4mm×4mm QFN-20 package | Prefer when telemetry, margining, or dynamic voltage scaling are required; adds complexity and cost. |
Compared with MP2315DJ-LF-Z and TPS544B20RTWR, the IR3822MTRPBF offers optimal balance of 4A capability, analog programmability (OCSet, SS, Vsns), and minimal external component count in a thermally optimized 5mm×6mm footprint-ideal for cost-sensitive, high-density analog VRMs.
Availability
IR3822MTRPBF is available at Aetrix Electronics and suitable for DDR memory power delivery, graphics card VRMs, and server point-of-load applications requiring stable component supply and long-term production continuity.
Supply support for IR3822MTRPBF 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 ICs, and industrial control solutions, with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.
The SupIRBuck™ product line delivers fully integrated, high-current DC/DC regulators targeting space-constrained computing and communications infrastructure where efficiency, thermal performance, and analog configurability are critical.
FAQ
What is the minimum output voltage achievable with IR3822MTRPBF?
The IR3822MTRPBF supports a minimum output voltage of 0.6V, set by its internal precision bandgap reference. This value is guaranteed over –40°C to +105°C with ±1.5% accuracy, enabling direct regulation of modern low-voltage processor and memory cores without external reference scaling.
How does the IR3822MTRPBF implement over-current protection without a sense resistor?
It uses RDS(on)-based current sensing on the internal low-side MOSFET. The voltage drop across the FET's on-resistance is monitored at the OCSet pin via an external resistor divider, eliminating the need for a discrete sense resistor while maintaining accuracy and efficiency.
Can IR3822MTRPBF operate with a 3.3V input supply?
No. The absolute minimum VIN is 2.5V, but the recommended operating VIN starts at 4.5V per datasheet Section 5. Below 4.5V, VCC UVLO (4.4V turn-on) and VC UVLO (3.5V turn-on) prevent reliable gate drive and regulation, risking unstable operation or shutdown.
What is the role of the three AGnd pins (4, 5, 15) and how should they be connected?
Pins 4, 5, and 15 are all analog ground terminals for internal reference, error amplifier, and feedback circuitry. They must be connected together at a single low-impedance star point near the IC, separate from PGnd, to minimize noise coupling and ensure stable regulation and accurate PGood reporting.
IR3822MTRPBF 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:
- 4A
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PQFN (5x6)
IR3822MTRPBF FAQ
1.How can I place an order for IR3822MTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3822MTRPBF 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 IR3822MTRPBF reliable?
The price and inventory of IR3822MTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3822MTRPBF is usually 5 days.
3.What payment methods are accepted for IR3822MTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3822MTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3822MTRPBF?
IR3822MTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3822MTRPBF 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 IR3822MTRPBF?
For technical support, including IR3822MTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3822MTRPBF requirements.
6.How does Aetrix verify that IR3822MTRPBF is sourced from the original manufacturer or authorized distributors?
All IR3822MTRPBF 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 IR3822MTRPBF meets industry standards.
7.What is the process for return or replacement of IR3822MTRPBF?
All IR3822MTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3822MTRPBF, 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 IR3822MTRPBF part is unused and in its original packaging.
Return procedure for IR3822MTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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