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Infineon Technologies IR3888MTRPBFAUMA1
- Part No.:
- IR3888MTRPBFAUMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 22-PowerVQFN
- Datasheet:
-
IR3888MTRPBFAUMA1.pdf
- Description:
- IC REG BUCK ADJ 25A 22IQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,239
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Product details
Overview
IR3888MTRPBFAUMA1 from Infineon is a fully integrated 25 A synchronous buck regulator with OptiMOS™ power stages, fast Constant On-Time (COT) control, 0.6 V ±0.5% reference voltage, and programmable 600 kHz–2 MHz switching frequency. It delivers high-efficiency point-of-load power in server, telecom, and storage systems with single-supply operation (4.3–17 V) or extended range (2.0–17 V) using external VCC.
For engineers reviewing the IR3888MTRPBFAUMA1 datasheet, IR3888MTRPBFAUMA1 pinout, IR3888MTRPBFAUMA1 application, or IR3888MTRPBFAUMA1 equivalent, key selection criteria include its thermally compensated OCP with four settings, monotonic soft-start with four timing options, pre-bias start-up capability, and ceramic-capacitor compatibility without external compensation.
Technical Context
The IR3888 implements a fast COT architecture with adaptive on-time generation, enabling sub-100 ns load transient response and stable operation with low-ESR ceramic output capacitors. Its internal LDO powers the controller from VIN or an external VCC bias, supporting flexible input configurations.
Control logic integrates programmable FCCM/DEM mode selection via TON/MODE pin, latched/non-latched OVP via SS/Latch, and four-tier OCP thresholds set by ILIM resistor. Power Good (open-drain) and enable with voltage monitoring provide system-level sequencing and fault reporting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 25 A continuous - supports high-density POL in servers and networking ASICs |
| Input Voltage Range | 4.3–17 V (single supply) or 2.0–17 V (with external VCC) - enables flexibility across 5 V, 12 V, and hybrid bias rails |
| Reference Voltage | 0.6 V ±0.5% - ensures ≤6 mV output voltage error at 1 V output, critical for CPU/GPU core rails |
| Switching Frequency | 600 kHz–2 MHz (8-step programmable) - balances efficiency vs. size: 1 MHz typical for 2×2 mm inductors |
| Soft-Start Time | 4 selectable values (0.5/1/2/4 ms) - prevents inrush current during hot-plug or reset sequences |
| OCP Thresholds | 4 user-selectable limits (18/22/25/28 A) - allows margin tuning for thermal derating or peak load handling |
| Junction Temp Range | −40 °C to +125 °C - qualified for industrial environments per JEDEC JESD22-A108 |
Pinout & Package
IR3888MTRPBFAUMA1 uses a 23-pin PQFN package measuring 6 mm × 5 mm with exposed thermal pad (PGND-connected). Pin layout supports high-current routing: three parallel SW pins (14–16), three PGND pins (11–13), and dual PVIN inputs (17,19) for low-impedance input path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB (1) | Voltage feedback input | Connects to output divider midpoint; sets regulated output voltage via VREF × (1 + R1/R2) |
| SS/Latch (2) | Soft-start timer & OVP latch control | Resistor-to-GND selects soft-start time; open/short configures latched vs. hiccup OVP response |
| VSENM (3) | Reference ground & remote sense return | Provides Kelvin return for feedback divider; improves regulation accuracy under PCB trace resistance |
| AGND (4,23) | Analog ground reference | Isolated signal ground plane connection; must tie to PGND at single point near IC |
| TON/MODE (5) | Frequency & conduction mode selector | Resistor-to-GND programs switching frequency and chooses FCCM (forced CCM) or DEM (diode emulation) |
| ILIM (6) | OCP threshold programming | Resistor-to-GND selects one of four current-limit thresholds for overcurrent protection |
| PGOOD (7) | Power-good status output | Open-drain output active high when output is within ±10% of target; requires external pull-up |
| VSNS (8) | OVP and PGOOD sense input | Monitors output voltage independently of FB; enables accurate OVP and PGOOD detection |
| VIN (9) | LDO input supply | Feeds internal LDO; short to VCC/LDO if external bias used; bypass with 4.7 µF ceramic |
| VCC/LDO (10) | Bias supply input/output | Accepts external 3.3–5.5 V bias or outputs ~5 V from internal LDO; bypass with 2.2–10 µF ceramic |
| PGND (11–13) | Power ground return | High-current return path for MOSFET sources and input/output capacitors; connects to thermal pad |
| SW (14–16) | Switch node output | Three paralleled pins drive external inductor; low-inductance routing minimizes switching loss |
| PVIN (17,19) | Main power input | Dual high-current inputs accept 2.0–17 V; routed to internal FETs and bootstrap circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Fast COT control with no external compensation | Enables stable regulation with <10 µF ceramic output capacitance, reducing BOM count and board area |
| Thermally compensated OCP | OCP threshold scales with junction temperature to maintain consistent current limit across −40 °C to +125 °C |
| Pre-bias start-up | Allows safe startup into pre-charged output rails without reverse current or voltage overshoot |
| Monotonic soft-start | Guarantees monotonic VOUT ramp regardless of input voltage or load, preventing system lockup |
| Four-mode operation (FCCM/DEM) | FCCM maintains fixed frequency under light load; DEM disables low-side FET to reduce switching losses below ~10% load |
Applications
| Server CPU Core Rail | Telecom Baseband ASIC Supply |
|---|---|
Use Scenario: Delivering 0.8–1.2 V @ up to 25 A to high-performance x86 or ARM CPU cores in 1U rack servers. IC Role / Device Role / Timing Role: Primary POL regulator with fast transient response and precise voltage tracking for dynamic DVFS. Use Value: Fast COT control achieves <50 µs recovery from 50% load step, minimizing voltage droop during burst workloads. | Use Scenario: Powering multi-core baseband processors in 5G macrocell radios requiring tight ripple (<10 mVpp) and high PSRR. IC Role / Device Role / Timing Role: High-efficiency intermediate bus converter stepping 12 V down to 1.8 V for digital signal processing blocks. Use Value: Ceramic-capacitor compatibility eliminates electrolytic bulk caps, improving long-term reliability in unventilated enclosures. |
| Enterprise SSD Controller Rail | Industrial FPGA I/O Bank Supply |
Use Scenario: Generating 1.2 V @ 15 A for NVMe SSD controllers with strict inrush and sequencing requirements. IC Role / Device Role / Timing Role: Sequenced POL regulator with programmable soft-start and PGOOD signaling for PCIe link training. Use Value: Four soft-start options allow matching to host controller reset timing, avoiding enumeration failures. | Use Scenario: Providing 3.3 V @ 8 A to FPGA I/O banks in programmable logic controllers with wide ambient temperature swings. IC Role / Device Role / Timing Role: Industrial-grade POL regulator with −40 °C to +125 °C qualification and thermally compensated OCP. Use Value: OCP threshold scaling with temperature prevents false trips during cold-start or sustained high-temp operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2964GQ-Z (Monolithic Power) | 20 A rating, 4.5–18 V input, 0.6 V reference, but lacks pre-bias start-up and thermally compensated OCP | Suitable for non-precharged loads; less robust in hot-swap or battery-backed systems | Choose when cost sensitivity outweighs need for pre-bias safety and thermal OCP stability |
| TPS546B24RVFT (TI) | 25 A, 3–18 V input, PMBus interface, digital control, but larger 7-mm QFN and higher BOM complexity | Required where telemetry, margining, or dynamic configuration via I²C is needed | Choose when digital power management and real-time telemetry justify added design effort and cost |
Compared with MP2964GQ-Z and TPS546B24RVFT, IR3888MTRPBFAUMA1 offers superior analog simplicity, guaranteed pre-bias start-up, and thermally stable OCP-making it optimal for high-reliability analog POL where digital interfaces or lower current ratings are not acceptable.
Availability
IR3888MTRPBFAUMA1 is available at Aetrix Electronics and suitable for server motherboard designs, telecom line card power supplies, and enterprise SSD power architectures requiring stable component supply, long lifecycle support, and industrial temperature qualification.
Supply support for IR3888MTRPBFAUMA1 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, and industrial control ICs, with global manufacturing and quality certification to ISO 9001 and IATF 16949.
The IR3888 belongs to Infineon's OptiMOS™ IPOL (Integrated POL) product line, designed specifically for high-current, space-constrained point-of-load applications in datacenter and communications infrastructure.
FAQ
What is the minimum output voltage supported by IR3888MTRPBFAUMA1?
The IR3888MTRPBFAUMA1 supports output voltages down to 0.6 V, set by its internal 0.6 V ±0.5% precision reference and external resistor divider on the FB pin. Lower voltages are not supported due to reference limitation and control loop stability constraints.
Can IR3888MTRPBFAUMA1 operate without an external bootstrap capacitor?
No. The IR3888MTRPBFAUMA1 requires a 0.1 µF ceramic bootstrap capacitor between BOOT and SW pins. This capacitor supplies gate drive voltage for the high-side MOSFET and is essential for proper switching operation; omission causes immediate functional failure.
How does the thermally compensated OCP function across temperature?
The IR3888MTRPBFAUMA1's OCP threshold scales linearly with junction temperature using an internal thermal sensor. At 25 °C, the selected ILIM setting (e.g., 25 A) holds; at 125 °C, it reduces to ~90% of nominal value, maintaining consistent SOA protection without manual derating.
Is IR3888MTRPBFAUMA1 compatible with 3.3 V-only bias supplies?
Yes. When powered from an external 3.3 V source applied to VCC/LDO, the internal LDO is disabled. The device operates with PVIN = 2.0–17 V and VCC = 3.3 V, provided VIN is shorted to VCC/LDO and a shared 10 µF ceramic bypass capacitor is used per datasheet Figure 3.
IR3888MTRPBFAUMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- OptiMOS™ IPOL
- Package/Case:
- 22-PowerVQFN
- 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):
- 2V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 17V
- Current - Output:
- 25A
- Frequency - Switching:
- 600kHz ~ 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-IQFN-22-2
IR3888MTRPBFAUMA1 FAQ
1.How can I place an order for IR3888MTRPBFAUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3888MTRPBFAUMA1 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 IR3888MTRPBFAUMA1 reliable?
The price and inventory of IR3888MTRPBFAUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3888MTRPBFAUMA1 is usually 5 days.
3.What payment methods are accepted for IR3888MTRPBFAUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3888MTRPBFAUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3888MTRPBFAUMA1?
IR3888MTRPBFAUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3888MTRPBFAUMA1 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 IR3888MTRPBFAUMA1?
For technical support, including IR3888MTRPBFAUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3888MTRPBFAUMA1 requirements.
6.How does Aetrix verify that IR3888MTRPBFAUMA1 is sourced from the original manufacturer or authorized distributors?
All IR3888MTRPBFAUMA1 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 IR3888MTRPBFAUMA1 meets industry standards.
7.What is the process for return or replacement of IR3888MTRPBFAUMA1?
All IR3888MTRPBFAUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with IR3888MTRPBFAUMA1, 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 IR3888MTRPBFAUMA1 part is unused and in its original packaging.
Return procedure for IR3888MTRPBFAUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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