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Infineon Technologies IR38064MTRPBF
- Part No.:
- IR38064MTRPBF
- Manufacturer:
- Infineon Technologies
- Package:
- 34-PowerVFQFN
- Datasheet:
-
IR38064MTRPBF.pdf
- Description:
- IC REG BUCK ADJ 35A IQFN-34-900
- Quantity:
- Payment:
- Shipping:
Inventory:3,022
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Product details
Overview
IR38064MTRPBF from Infineon Technologies is a digitally configurable, synchronous buck DC-DC converter with integrated high- and low-side MOSFETs, PMBus/I²C interface, 35 A continuous output current, 0.5% reference voltage accuracy, and operation from 5.5 V to 21 V input. It delivers tightly regulated low-voltage power (0.5–0.875×PVIN) for high-current server and telecom point-of-load applications.
For engineers reviewing the IR38064MTRPBF datasheet, IR38064MTRPBF pinout, IR38064MTRPBF application, or IR38064MTRPBF equivalent, key selection considerations include its dual-mode (analog/digital) operation, thermally compensated overcurrent protection, remote differential sensing, programmable switching frequency up to 1.5 MHz, and dedicated output voltage sensing that remains active during disable.
Technical Context
The IR38064 implements a voltage-mode PWM controller with internal LDO biasing, enabling single-supply operation from 5.5 V to 21 V. Its digital control core supports 66 PMBus commands for configuration, telemetry (VOUT, IOUT, TJ), fault reporting, and sequencing - all stored in nonvolatile memory.
In analog mode, it functions as a standard buck regulator with external RT resistor frequency setting, EN/FCCM pin-based CCM forcing, and analog telemetry outputs on SDA/IMON and SALERT/TMON pins. The block diagram confirms independent current-sense amplification, true differential remote sensing (RS+/RS−), and dedicated OVP monitoring via Vsns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 35 A continuous - supports high-density server VR13/VR14 compliant loads without external current sharing. |
| Input Voltage Range | 5.5 V to 21 V - single-input operation enabled by internal LDO; no auxiliary bias supply required. |
| Output Voltage Range | 0.5 V to 0.875×PVIN - enables adaptive scaling for CPU/GPU core rails with dynamic voltage identification. |
| Reference Accuracy | ±0.5% (0°C–85°C) - ensures tight regulation tolerance critical for sub-1 V logic supply stability. |
| Switching Frequency | 225 kHz to 1.5 MHz - adjustable via RT resistor or PMBus; higher frequencies reduce output filter size. |
| Junction Temp Range | −40°C to +125°C - validated for industrial and telecom base station thermal environments. |
| Thermal Resistance | θJ-PCB = 2.05°C/W - optimized 5 mm × 7 mm PQFN package enables >30 W/cm² power density. |
Pinout & Package
IR38064MTRPBF uses a thermally enhanced 26-pin PQFN package (5 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad. Pins 23 and 26 are internally connected but externally separated per assembly drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN | Main power input for high-side MOSFET | Accepts 5.5–21 V bus; requires local 4×22 µF + 0.1 µF ceramic decoupling at pin. |
| BOOT | High-side gate driver bootstrap supply | Connects via 0.1 µF capacitor to SW; series resistor (1–4.02 Ω) required for PVIN > 16 V to limit dV/dt. |
| FB | Inverting error amplifier input | Direct connection to output or remote sense amplifier; sets VOUT via resistor divider. |
| RT/SYNC | Frequency programming / sync input | Resistor-to-GND sets fSW in analog mode; accepts external clock in digital mode. |
| SDA/IMON | PMBus data / analog current monitor | Provides real-time IOUT voltage proportional signal when PMBus disabled. |
| SALERT/TMON | Alert output / analog temperature monitor | Open-drain SMBALERT#; outputs junction temperature voltage in analog mode. |
| VSNS | Dedicated OVP and PGood sense input | Independent of FB path; remains active even when EN is low for fail-safe monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | Top-switch RDS(on) = 2.4–4.4 mΩ, bottom-switch RDS(on) = 0.86–1.78 mΩ - eliminates external FET selection and layout complexity. |
| Dual-Mode Operation | Full PMBus configurability or plug-and-play analog mode with zero firmware dependency - reduces bring-up time. |
| True Differential Remote Sensing | RS+ and RS− inputs enable millivolt-level load regulation accuracy despite PCB IR drop. |
| Pre-Bias Start-Up | Allows safe startup into pre-charged output capacitors - essential for hot-swap and multi-rail sequencing. |
| Thermally Compensated OCP | Current limit adjusts with junction temperature to maintain consistent trip threshold across operating range. |
Applications
| Server CPU Core Supply | Telecom Baseband Processor Rail |
|---|---|
|
Use Scenario: Delivering 0.75 V @ 30 A to Intel Xeon or AMD EPYC CPU cores under dynamic DVFS load transients. IC Role / Device Role / Timing Role: Primary point-of-load regulator with PMBus telemetry for real-time current/voltage/temperature monitoring and dynamic margining. Use Value: ±0.5% reference accuracy and remote sensing ensure <±5 mV regulation error at socket, meeting VR13.0 spec. |
Use Scenario: Powering FPGA and DSP cores in 5G massive MIMO radio units requiring stable 0.85 V @ 25 A with thermal derating. IC Role / Device Role / Timing Role: Digitally managed buck converter with sequencing capability (Track_EN/P1V8) for controlled power-up of multi-domain SoCs. Use Value: Junction temperature monitoring via SALERT/TMON enables predictive thermal throttling before silicon exceeds 125°C. |
| Network Switch ASIC Supply | Industrial Edge AI Accelerator Rail |
|
Use Scenario: Generating 0.8 V @ 35 A for Broadcom Tomahawk or Marvell Prestera switch ASICs in data center top-of-rack switches. IC Role / Device Role / Timing Role: High-current POL regulator with fast transient response (<10 µs recovery) and programmable soft-start to limit inrush. Use Value: Integrated MOSFETs and 1.5 MHz max switching frequency allow compact 12 mm × 12 mm solution size with <150 mV undershoot. |
Use Scenario: Supplying 0.65 V @ 28 A to NVIDIA Jetson Orin NX modules in ruggedized edge inference systems. IC Role / Device Role / Timing Role: Analog-mode fallback regulator with EN/FCCM-controlled CCM operation for deterministic behavior in safety-critical firmware stacks. Use Value: Dedicated Vsns OVP protection remains active during shutdown, preventing damage from upstream rail faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP8772GQ-Z (Monolithic Power) | 30 A rated, 4.5–16 V input, no PMBus, only analog interface; lower integration (external bootstrap diode). | Lacks digital telemetry and sequencing - suitable for cost-sensitive, fixed-function designs without system management. | Select when firmware-free analog operation and lower BOM count outweigh need for telemetry and configuration flexibility. |
| TPS546D24 (Texas Instruments) | 40 A rated, 3–18 V input, full PMBus 1.3 compliance, higher pin count (32-QFN), includes VIN tracking and GPIOs. | Supports more complex multi-phase and rail-coordination schemes; requires additional layout area and firmware stack. | Select when system-level power management (e.g., coordinated sequencing across 4+ rails) is mandatory and space allows larger footprint. |
Compared with MP8772GQ-Z and TPS546D24, IR38064MTRPBF uniquely balances digital configurability with analog fallback simplicity, integrates bootstrap diode and LDO, and delivers 35 A in the smallest footprint (5×7 mm), making it optimal for space-constrained, mixed-mode server and telecom POLs.
Availability
IR38064MTRPBF is available at Aetrix Electronics and suitable for server CPU core supplies, 5G baseband processor rails, and network switch ASIC power delivery requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for IR38064MTRPBF 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 and silicon carbide solutions.
The SupIRBuck™ product line targets high-current, digitally manageable point-of-load regulation for data center, telecom, and embedded computing - emphasizing integration, thermal performance, and PMBus interoperability.
FAQ
Can IR38064MTRPBF operate without PMBus communication?
Yes. IR38064MTRPBF supports full analog-mode operation: switching frequency set by RT resistor, output voltage configured via FB divider, and telemetry (IOUT, TJ) provided as analog voltages on SDA/IMON and SALERT/TMON pins. No firmware or PMBus host is required for basic regulation.
What is the purpose of the Track_EN pin?
Track_EN enables voltage tracking for multi-rail sequencing: when pulled low, it synchronizes IR38064MTRPBF's soft-start with another regulator's output via the Vp pin. For standalone use, it must be biased to P1V8 (100 kΩ) or LGND (750 kΩ) to disable tracking and prevent undefined behavior.
How does the Vsns pin differ from the FB pin in fault protection?
Vsns provides dedicated, always-active overvoltage protection and PGood assertion independent of FB loop status or EN state. Even when EN is low, Vsns continues monitoring output voltage - ensuring fail-safe shutdown if downstream faults cause overvoltage during standby.
Is an external bootstrap diode required?
No. IR38064MTRPBF integrates the bootstrap diode, eliminating the need for external components in the bootstrap circuit. Only a 0.1 µF ceramic capacitor between BOOT and SW is required; a series resistor (1–4.02 Ω) is recommended for PVIN > 16 V to manage dV/dt and reduce switch-node ringing.
IR38064MTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- SupIRBuck®
- Package/Case:
- 34-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.2V
- Voltage - Input (Max):
- 21V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 18.06V
- Current - Output:
- 35A
- Frequency - Switching:
- 400kHz ~ 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-IQFN-34-900
IR38064MTRPBF FAQ
1.How can I place an order for IR38064MTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR38064MTRPBF 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 IR38064MTRPBF reliable?
The price and inventory of IR38064MTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR38064MTRPBF is usually 5 days.
3.What payment methods are accepted for IR38064MTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR38064MTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR38064MTRPBF?
IR38064MTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR38064MTRPBF 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 IR38064MTRPBF?
For technical support, including IR38064MTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR38064MTRPBF requirements.
6.How does Aetrix verify that IR38064MTRPBF is sourced from the original manufacturer or authorized distributors?
All IR38064MTRPBF 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 IR38064MTRPBF meets industry standards.
7.What is the process for return or replacement of IR38064MTRPBF?
All IR38064MTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR38064MTRPBF, 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 IR38064MTRPBF part is unused and in its original packaging.
Return procedure for IR38064MTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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