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Infineon Technologies IR3800MTRPBF
- Part No.:
- IR3800MTRPBF
- Manufacturer:
- Infineon Technologies
- Package:
- 15-PowerVQFN
- Datasheet:
-
IR3800MTRPBF.pdf
- Description:
- IC REG BUCK ADJ 12A PQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,546
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Product details
Overview
IR3800MTRPBF from Infineon Technologies is a highly integrated synchronous buck regulator with integrated high- and low-side MOSFETs, delivering up to 12A continuous output current. It operates from 2.5V–21V input, regulates output from 0.6V–12V, and features fixed 600kHz switching frequency, programmable over-current protection, and pre-bias start-up-used in graphics card VRMs and embedded point-of-load systems.
For engineers reviewing the IR3800MTRPBF datasheet, IR3800MTRPBF pinout, IR3800MTRPBF application, or IR3800MTRPBF equivalent, key selection criteria include its 12A load capability, 0.6V reference accuracy (±2%), thermally enhanced 5mm×6mm QFN package, hiccup-mode current limiting, and dual UVLO thresholds for VCC and VC supplies.
Technical Context
The IR3800MTRPBF implements voltage-mode PWM control with a fixed 600kHz oscillator and internal sawtooth ramp generator-no external timing components required. Its error amplifier compares FB voltage against a precision 0.6V reference, driving gate drivers via trailing-edge modulation.
Current sensing uses RDS(on) of the integrated low-side MOSFET (6.9–8.7mΩ), eliminating external sense resistors. Protection includes non-latched thermal shutdown at 140°C (20°C hysteresis), dual UVLO (VCC: 4.0–4.4V turn-on, VC: 3.1–3.5V turn-on), and soft-start/shutdown via SS pin.
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 adapters. |
| Output Current | 12A continuous - enables single-regulator solutions for GPU core or SoC power domains. |
| Switching Frequency | 600kHz (±10%) - allows compact 0.6μH inductors and reduces EMI filtering burden. |
| Reference Voltage | 0.6V ±2% over –40°C to +105°C - ensures tight output regulation for sub-1V CPU/GPU cores. |
| RDS(on) Top/Bottom | 6.9–8.7mΩ each - minimizes conduction loss at 12A, enabling >90% efficiency at 1.8V/12A. |
| Thermal Shutdown | 140°C trip, 20°C hysteresis - protects silicon during sustained overload without latch-up. |
| Soft-Start Control | Programmable via external capacitor on SS pin - prevents inrush current into large output capacitors. |
Pinout & Package
Package: 15-pin, 5mm × 6mm thermally enhanced Power QFN with exposed thermal pad (PGnd-connected). Pin 1 is NC; pins 4, 5, and 15 are AGnd and must be shorted on PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 9 NC | No-connect | Unused die bond pads - must remain unconnected per layout guidelines. |
| 2 FB | Error amplifier inverting input | Connects to output via resistor divider to set regulated voltage; senses 0.6V reference point. |
| 3 COMP | Error amplifier output | Drives PWM comparator; external compensation network connects here for loop stability. |
| 4, 5, 15 AGnd | Analog ground reference | Low-noise return for feedback, error amp, and reference - must tie to clean analog ground plane. |
| 6 SS/SD | Soft-start / shutdown control | Pull below 0.3V to disable regulator; capacitor to AGnd sets startup ramp time. |
| 7 OCSet | Over-current threshold set | Resistor from OCSet to SW pin programs current limit based on RDS(on) sensing. |
| 8 VCC | Bias supply for logic & low-side driver | Requires ≥0.1μF ceramic cap to PGnd; UVLO triggers at 4.0–4.4V. |
| 10 PGnd | Power ground return | High-current return for MOSFET drivers - must connect directly to power ground plane. |
| 11 SW | Switch node | Connects to inductor and OCSet resistor; carries high di/dt switching waveform. |
| 12 VIN | Main input supply | Accepts 2.5–21V; feeds high-side driver bootstrap via VC path. |
| 13 HG | High-side gate driver output | Drives top MOSFET gate; requires small RC snubber to SW for EMI control. |
| 14 VC | Bootstrap supply for high-side driver | Must be ≥VIN + 5V; requires ≥0.1μF ceramic cap to PGnd; UVLO at 3.1–3.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual MOSFETs | Eliminates external FETs and gate drivers - reduces BOM count and layout area by >40% vs discrete solutions. |
| Pre-bias start-up | Enables safe startup into pre-charged outputs - prevents reverse current flow and system bus disturbance. |
| Hiccup-mode OCP | Auto-retry current limiting - sustains operation under temporary overload without thermal runaway or latch-off. |
| Thermally enhanced QFN | Exposed PGnd pad and optimized copper slug - achieves θJA ≈ 35°C/W, supporting 12A in 1-in² PCB area. |
| Dual independent UVLO | Separate VCC and VC monitoring - ensures both driver stages are fully biased before enabling switching. |
Applications
| Graphics Card VRM | Desktop PC Core Regulator |
|---|---|
Use Scenario: Delivering stable 0.8–1.3V at up to 12A to GPU core under dynamic load transients. IC Role / Device Role / Timing Role: Primary synchronous buck controller with integrated power stage and fast transient response. Use Value: Enables single-chip solution replacing multi-FET discrete designs, reducing footprint by 30% and improving phase margin via integrated compensation. | Use Scenario: Supplying CPU I/O or chipset voltage (1.05–1.8V) in ATX-based desktop motherboards. IC Role / Device Role / Timing Role: Point-of-load regulator with programmable soft-start and hiccup protection for system robustness. Use Value: Eliminates need for external current-sense resistor and discrete gate drivers, lowering total solution cost by ~$0.35/unit. |
| Embedded System PoL | Set-Top Box Power Management |
Use Scenario: Generating 1.2V/10A for ARM-based SoCs in industrial gateways with limited board space. IC Role / Device Role / Timing Role: High-efficiency DC/DC converter with thermal shutdown and pre-bias startup for cold-boot reliability. Use Value: Maintains regulation during brown-out events and survives ambient temperatures up to 85°C without derating. | Use Scenario: Providing 3.3V/5A and 1.2V/8A rails for video processing ASICs and memory in consumer STBs. IC Role / Device Role / Timing Role: Dual-rail capable regulator used in cascaded configurations with external sequencing. Use Value: Reduces component count per rail by 7 parts vs discrete buck IC + MOSFET solution, easing FCC Class B EMI compliance. |
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 (Monolithic Power) | 12A rating, 2.5–18V input, 500kHz switching, no VC bootstrap pin - uses charge pump instead. | Lacks separate VC supply; less suitable for high-VIN (>18V) or high-efficiency 12V-in applications. | Preferred for cost-sensitive 12V-input systems where VC complexity is unnecessary. |
| TPS546B24RVFR (TI) | 15A rating, 4–18V input, PMBus interface, 700kHz, integrated telemetry - higher integration but larger 6mm×6mm QFN. | Supports digital configuration and fault logging - adds design overhead for analog-only systems. | Chosen when telemetry, margining, or multi-rail coordination is required in server/enterprise gear. |
Compared with MP8765GQ-Z and TPS546B24RVFR, the IR3800MTRPBF offers optimal balance of wide input range (2.5–21V), dedicated VC bootstrap for high-efficiency 12–19V inputs, and minimal external component count - making it ideal for analog-focused, space-constrained computing and graphics applications.
Availability
IR3800MTRPBF is available at Aetrix Electronics and suitable for graphics card VRMs, desktop PC core regulators, and embedded point-of-load systems requiring stable component supply and long-term production continuity.
Supply support for IR3800MTRPBF 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 MCUs, and RF solutions, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949.
The IR3800 belongs to Infineon's SupIRBuck™ family-designed specifically for high-current, space-constrained DC/DC conversion in computing, graphics, and consumer electronics where integration, thermal performance, and reliability are critical.
FAQ
What is the minimum recommended output capacitance for stable 12A operation?
The IR3800MTRPBF requires ≥1500μF total output capacitance with low ESR (≤2mΩ) for 12A step-load stability. Typical designs use three 470μF/6.3V polymer capacitors in parallel near the SW and PGnd pins to minimize AC loop inductance and ensure <1% output deviation under 8A/μs transient.
Can the IR3800MTRPBF operate without an external bootstrap capacitor on the VC pin?
No. The VC pin requires a minimum 0.1μF X7R ceramic capacitor connected directly between VC and PGnd. Omitting this capacitor causes high-side driver failure within milliseconds due to insufficient bootstrap voltage, resulting in immediate loss of regulation and potential thermal damage.
How does the OCSet resistor value affect current limit accuracy?
The OCSet resistor sets current limit via RDS(on) sensing: IOCSET = 20μA × (RDS(on)_bot / ROCSet). For 12A limit with 7.8mΩ bottom FET, ROCSet = 13kΩ yields ±15% tolerance. Tighter limits require 1% metal-film resistors and layout symmetry to minimize parasitic resistance errors.
Is the IR3800MTRPBF RoHS-compliant and lead-free?
Yes. The IR3800MTRPBF is Pb-free and RoHS-compliant per EU Directive 2011/65/EU, with JEDEC Level 3 moisture sensitivity rating (MSL3 @ 260°C). The "PbF" suffix confirms lead-free termination, and the device uses matte tin plating on all exposed terminals for reliable solderability and whisker resistance.
IR3800MTRPBF 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)
IR3800MTRPBF FAQ
1.How can I place an order for IR3800MTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3800MTRPBF 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 IR3800MTRPBF reliable?
The price and inventory of IR3800MTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3800MTRPBF is usually 5 days.
3.What payment methods are accepted for IR3800MTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3800MTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3800MTRPBF?
IR3800MTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3800MTRPBF 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 IR3800MTRPBF?
For technical support, including IR3800MTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3800MTRPBF requirements.
6.How does Aetrix verify that IR3800MTRPBF is sourced from the original manufacturer or authorized distributors?
All IR3800MTRPBF 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 IR3800MTRPBF meets industry standards.
7.What is the process for return or replacement of IR3800MTRPBF?
All IR3800MTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3800MTRPBF, 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 IR3800MTRPBF part is unused and in its original packaging.
Return procedure for IR3800MTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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