My Inquiry
My Account
Infineon Technologies IR3640MTRPBF
- Part No.:
- IR3640MTRPBF
- Manufacturer:
- Infineon Technologies
- Category:
- DC DC Switching Controllers
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
IR3640MTRPBF.pdf
- Description:
- IC REG CTRLR BUCK 20MLPQ
- Quantity:
- Payment:
- Shipping:
Inventory:3,433
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
IR3640MTRPBF from Infineon Technologies is a synchronous buck PWM controller IC for high-performance point-of-load DC/DC conversion. It operates from 1.5V–24V input, delivers 0.7V–0.9×Vin output with ±1% reference accuracy (0°C–125°C), supports up to 1.5MHz switching frequency, and integrates MOSFET drivers, bootstrap diode, and power-good output in a 20-lead MLPQ (3mm×4mm) package.
For engineers reviewing the IR3640MTRPBF datasheet, IR3640MTRPBF pinout, IR3640MTRPBF application, or IR3640MTRPBF equivalent, key selection criteria include its voltage-mode control architecture, RDS(on)-based hiccup OCP, programmable soft-start/SS/SD, external sync capability, and thermal shutdown with 140°C trip point.
Technical Context
The IR3640MTRPBF implements a single-loop voltage-mode control architecture with a 0.7V ±1% internal reference, 20–40 MHz gain-bandwidth product, and 7–20 V/μs error amplifier slew rate-enabling precise regulation and fast transient response across wide line/load/temperature ranges. Its oscillator uses an external RT resistor to set frequency from 225 kHz to 1.65 MHz, with sync input accepting 20% above free-running frequency.
It drives N-channel high-side and low-side MOSFETs via integrated drivers with 10–45 ns dead-time control, 2.0–5.0 Ω high-side source impedance, and 0.4–1.0 Ω low-side sink impedance. Protection includes overvoltage (110–120% VREF), thermal shutdown (140°C), and programmable current limit via OCSET pin with 20.8–172 μA threshold range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.5V to 24V - supports wide-range industrial, server, and telecom input rails including 3.3V, 5V, 12V, and 24V systems. |
| Output Voltage Accuracy | ±1% over 0°C–125°C - ensures stable core voltage regulation for CPUs, FPGAs, and ASICs under thermal stress. |
| Switching Frequency | 225 kHz to 1.5 MHz - enables optimization between efficiency (lower fSW) and compact size (higher fSW). |
| Reference Voltage | 0.7V ±1% - provides tight feedback tolerance for sub-1V outputs common in advanced digital loads. |
| OCP Threshold Range | 20.8–172 μA at OCSET - allows precise current-limit programming independent of MOSFET RDS(on). |
| Thermal Shutdown | 140°C with 20°C hysteresis - prevents latch-up during sustained overload while enabling safe recovery. |
| Power Good Output | Open-drain, 83–93% VREF threshold - provides reliable system sequencing and fault signaling to host controllers. |
Pinout & Package
IR3640MTRPBF is housed in a thermally enhanced 20-lead MLPQ package (3mm × 4mm), with exposed thermal pad on underside connected to PCB copper via vias for 4-layer board designs (θJA = 36°C/W, θJC = 4°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | IC bias supply input | 4.5–5.5V regulated supply for internal logic and gate drivers; UVLO thresholds at 4.06V (start) / 3.76V (stop). |
| PVcc | Driver section supply | 4.5–5.5V supply dedicated to high/low-side drivers; decoupling critical for gate drive stability. |
| HDrv | High-side MOSFET gate driver output | Drives N-channel high-side switch; features 10–45 ns dead-time control and 2.0–5.0 Ω source impedance. |
| LDrv | Low-side MOSFET gate driver output | Drives N-channel low-side switch; 0.4–1.0 Ω sink impedance and matched timing to HDrv for ZVS/ZCS optimization. |
| SW | Switch node connection | Connects to drain of high-side and source of low-side MOSFETs; handles high dv/dt and must be minimized in layout. |
| Fb | Inverting input of error amplifier | Feedback node for output voltage regulation; referenced to 0.7V internal reference with ±10 mV offset. |
| OCset | Over-current limit programming | Current-sense input setting hiccup-mode OCP threshold; 20.8–172 μA range corresponds to full-scale load protection. |
| PGood | Power-good open-drain output | Asserts when Vsns ≥ 83% VREF; used for system enable sequencing and fault indication with 256/fSW delay. |
| Sync | External synchronization input | Accepts TTL/CMOS clock signal up to 20% above free-running frequency for EMI reduction and multi-phase coordination. |
| SS/SD | Soft-start/shutdown control | Capacitor-programmable soft-start ramp; pulled low disables controller with hiccup-mode restart after 4096 cycles. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | Eliminates external diode component, reduces BOM count and layout area while maintaining >95% duty cycle capability. |
| Enhanced pre-bias start-up | Allows controlled ramp-up even when output capacitor is pre-charged, preventing reverse current flow into load. |
| Output voltage tracking | Seq pin enables synchronized ramp-up with other rails using external voltage source, supporting multi-rail FPGA/CPU sequencing. |
| RDS(on)-based hiccup OCP | Uses MOSFET conduction loss as current sense-no shunt resistor required, improving efficiency and reducing heat generation. |
| Programmable switching frequency | RT resistor sets frequency from 225 kHz to 1.65 MHz, enabling EMI compliance and optimal trade-off between core loss and switching loss. |
Applications
| Server VRMs | Network Switch Power |
|---|---|
|
Use Scenario: Regulating 0.85V @ 60A for Intel Xeon CPU cores in dual-socket rack servers. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing high-current, low-voltage POL conversion with strict transient response requirements. Use Value: ±1% output accuracy and 7–20 V/μs error amplifier slew rate ensure <5% droop under 50A/μs load steps, meeting VR14 specifications. |
Use Scenario: Generating 1.2V for 10G Ethernet PHYs and packet processors in modular chassis switches. IC Role / Device Role / Timing Role: High-frequency (1.2 MHz) buck controller enabling compact magnetics and reduced output capacitance. Use Value: 1.5 MHz max switching frequency allows use of 0805-size inductors and 10×22μF ceramic output caps, cutting solution footprint by 35%. |
| Game Console SoC Power | Industrial FPGA Boards |
|
Use Scenario: Dynamic voltage scaling for AMD RDNA GPU cores in next-gen gaming consoles with rapid load transients. IC Role / Device Role / Timing Role: Adaptive POL controller with programmable soft-start and voltage tracking for coordinated rail ramp-up. Use Value: Seq pin-based tracking and 200 ns typical gate driver rise/fall times support <100 ns response to GPU DVFS commands. |
Use Scenario: Providing 1.0V core voltage for Xilinx Kintex-7 FPGAs in ruggedized industrial PLC modules. IC Role / Device Role / Timing Role: Robust buck controller operating from 12V intermediate bus with -40°C to 125°C junction rating. Use Value: Thermal shutdown (140°C) and extended temperature operation ensure reliability in sealed, fanless enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2940A from Monolithic Power Systems | Current-mode control, 4.5–28V input, fixed 0.6V reference, no external sync, smaller 16-QFN package. | Lacks external synchronization and voltage tracking; better suited for cost-sensitive, non-EMI-critical applications. | Choose MP2940A only if sync and tracking are unnecessary and board space is constrained. |
| LM5116 from Texas Instruments | Wide-input (6–100V), external MOSFET drivers, no integrated bootstrap diode, requires external current sense. | Designed for high-voltage industrial DC/DC; lacks RDS(on) OCP and pre-bias start-up, increasing BOM and complexity. | Prefer LM5116 only for >24V input systems where IR3640MTRPBF's 24V max is insufficient. |
Compared with MP2940A and LM5116, IR3640MTRPBF uniquely combines voltage-mode precision, integrated bootstrap diode, RDS(on)-based hiccup OCP, and external sync-making it optimal for high-density, EMI-sensitive, multi-rail server and networking POL designs.
Availability
IR3640MTRPBF is available at Aetrix Electronics and suitable for server VRMs, network switch power supplies, game console SoC power, and industrial FPGA boards requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for IR3640MTRPBF 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 high-efficiency power conversion solutions.
The IR3640M series belongs to Infineon's high-frequency synchronous buck controller product line, designed specifically for performance-critical point-of-load applications in datacenter, telecom, and consumer electronics where precision, density, and reliability are paramount.
FAQ
What is the minimum output voltage supported by IR3640MTRPBF?
The IR3640MTRPBF supports output voltages down to 0.7V, set by its internal 0.7V ±1% reference voltage. This is achieved by connecting the FB pin directly to the output through a resistive divider where the lower resistor is grounded and the upper resistor connects to output-ensuring accurate regulation even at sub-1V levels required by modern processors and FPGAs.
Does IR3640MTRPBF require an external bootstrap capacitor?
No, IR3640MTRPBF integrates a bootstrap diode, eliminating the need for an external bootstrap diode. However, a bootstrap capacitor (typically 0.1μF X7R) is still required between BOOT and SW pins to provide gate drive voltage for the high-side MOSFET. The integrated diode charges this capacitor during low-side conduction, simplifying layout and reducing component count.
How does the hiccup-mode overcurrent protection work?
Hiccup-mode OCP activates when sensed current exceeds the threshold set by the OCSET pin. Upon fault detection, the controller shuts down both drivers, waits for a fixed 4096-cycle timeout (~10–20 ms depending on fSW), then attempts automatic restart. This limits average power dissipation during sustained short circuits and prevents thermal runaway without requiring manual reset.
Can IR3640MTRPBF synchronize to an external clock?
Yes, IR3640MTRPBF accepts external synchronization via the SYNC pin, supporting input frequencies up to 20% above its free-running frequency (e.g., up to ~1.8 MHz for a 1.5 MHz design). The sync signal must meet TTL/CMOS logic levels, with pulse width between 100–200 ns, enabling EMI reduction and phase interleaving in multi-phase systems.
IR3640MTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Frequency - Switching:
- 225kHz ~ 1.65MHz
- Duty Cycle (Max):
- 92%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Current Limit, Enable, Frequency Control, Power Good, Sequencing, Soft Start
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-MLPQ (3x4)
IR3640MTRPBF FAQ
1.How can I place an order for IR3640MTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3640MTRPBF 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 IR3640MTRPBF reliable?
The price and inventory of IR3640MTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3640MTRPBF is usually 5 days.
3.What payment methods are accepted for IR3640MTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3640MTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3640MTRPBF?
IR3640MTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3640MTRPBF 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 IR3640MTRPBF?
For technical support, including IR3640MTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3640MTRPBF requirements.
6.How does Aetrix verify that IR3640MTRPBF is sourced from the original manufacturer or authorized distributors?
All IR3640MTRPBF 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 IR3640MTRPBF meets industry standards.
7.What is the process for return or replacement of IR3640MTRPBF?
All IR3640MTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3640MTRPBF, 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 IR3640MTRPBF part is unused and in its original packaging.
Return procedure for IR3640MTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IR3640MTRPBF Tags
-
UCC28C45DR
Texas Instruments
-
UCC28C40DR
Texas Instruments
-
UCC28C43DR
Texas Instruments
-
ZXSC410E6TA
Diodes Incorporated
-
LM3524DMX/NOPB
Texas Instruments
-
LM3489MMX/NOPB
Texas Instruments
-
MIC2102YML-TR
Microchip Technology
-
LM5148RGYR
Texas Instruments
-
TL598CDR
Texas Instruments
-
LM5155DSSR
Texas Instruments
-
LM25085MYX/NOPB
Texas Instruments
-
UCC2813DTR-0
Texas Instruments
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
