My Inquiry
My Account
Infineon Technologies IR3888BMTRPBFAUMA1
- Part No.:
- IR3888BMTRPBFAUMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 22-PowerVQFN
- Datasheet:
-
IR3888BMTRPBFAUMA1.pdf
- Description:
- IC REG BUCK ADJ 25A 22IQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,591
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
IR3888BMTRPBFAUMA1 from Infineon is a fully integrated synchronous buck regulator with OptiMOS™ power stages, delivering up to 16 A output current. It operates from 4.3 V–17 V input (or 2.0 V–17 V with external VCC), features a 0.6 V ±0.5% reference, 800 kHz fixed switching frequency, and Fast Constant On-Time (COT) control enabling stable operation with ceramic output capacitors-used in server point-of-load power rails.
For engineers reviewing the IR3888BMTRPBFAUMA1 datasheet, IR3888BMTRPBFAUMA1 pinout, IR3888BMTRPBFAUMA1 application, or IR3888BMTRPBFAUMA1 equivalent, key selection criteria include its thermally compensated overcurrent protection, monotonic pre-bias start-up, integrated bootstrap diode, and compatibility with single-supply or externally biased VCC configurations.
Technical Context
The IR3888B implements a Fast COT control architecture with adaptive on-time generation and zero-crossing detection for fast transient response without external compensation. Its internal LDO powers the controller from VIN or an external VCC, supporting wide input range flexibility.
Protection logic includes thermally compensated OCP with hiccup-mode latching, programmable UVP/OVP thresholds referenced to VSNS, and thermal shutdown at Tj ≥ 150 °C. The PGOOD open-drain output asserts after soft-start completion and valid output regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 16 A continuous - supports high-density PoL loads in telecom and server applications |
| Input Voltage Range | 4.3 V–17 V (single supply); extends to 2.0 V–17 V with external VCC bias - enables flexible system-level rail sourcing |
| Reference Voltage | 0.6 V ±0.5% - enables precise output voltage setting (e.g., 0.8 V–3.3 V) with minimal drift over temperature |
| Switching Frequency | 800 kHz fixed - balances efficiency, size, and EMI performance for compact PCB layouts |
| Operating Junction Temp | −40 °C to +125 °C - qualified for industrial environments per JEDEC47/20/22 |
| Package Thermal Resistance | RθJA = 29.5 °C/W (JEDEC Std.) - enables 16 A operation with standard 2-layer PCB copper area |
| Soft-Start Time | Internal 2.5 ms - ensures monotonic output ramp and prevents inrush into pre-biased loads |
Pinout & Package
IR3888BMTRPBFAUMA1 is housed in a thermally enhanced 6 mm × 5 mm PQFN package with exposed thermal pad (PGND-connected), 23-pin layout, and RoHS2-compliant halogen-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB | Voltage feedback input | Connects to resistor divider output to set regulated VOUT; senses output with 0.6 V reference |
| VSENM | Remote sense return / reference ground | Provides pseudo remote sensing return path and serves as analog ground for internal reference |
| AGND | Analog ground | Signal ground for control circuitry; must be connected to PGND at single point on PCB |
| PGOOD | Open-drain status output | Asserts high (via external pull-up) when VOUT is within ±5% of target and soft-start complete |
| VSNS | OVP & PGOOD sense input | Monitors output via resistor divider for overvoltage protection and PGOOD qualification |
| VIN | LDO input supply | Powers internal LDO; requires 4.7 µF ceramic capacitor to PGND (or shared with VCC/LDO if externally biased) |
| VCC/LDO | Bias supply I/O | Accepts external bias or outputs internal LDO voltage; decoupled with 2.2–10 µF ceramic cap to PGND |
| SW | Power switch node | High-side and low-side FET connection point; drives external output inductor |
| PVIN | Main power stage input | Supplies high-current power stage; three pins (17/18/19) reduce conduction loss and thermal stress |
| BOOT | High-side gate driver supply | Connected to SW via bootstrap capacitor to enable N-channel high-side MOSFET drive |
| EN | Enable input with voltage monitoring | Active-high enable with built-in under-voltage lockout; asserts PGOOD only after EN valid and soft-start |
| PGND | Power ground | High-current return path for power stage; must be low-impedance plane tied to AGND at one point |
Key Features
| Feature | Design Value |
|---|---|
| Fast Constant On-Time (COT) Control | Enables stable regulation with ceramic output capacitors and no external compensation components |
| Thermally Compensated Overcurrent Protection | Adjusts current limit threshold with junction temperature to maintain safe SOA across operating range |
| Monotonic Pre-Bias Start-Up | Allows safe startup into pre-charged output rails without reverse current or output collapse |
| Integrated Bootstrap Diode | Eliminates need for external bootstrap diode, reducing BOM count and layout complexity |
| Internal LDO with External Bias Option | Supports single-supply operation or extended input range (2.0 V–17 V) using external VCC |
Applications
| Server Point-of-Load Regulation | Storage Controller Power |
|---|---|
Use Scenario: Regulating 1.2 V/12 A core voltage for dual-socket Xeon processors in rack-mounted servers. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated CPU core power with fast load-step response. Use Value: Fast COT control achieves <10 µs transient recovery; thermally compensated OCP prevents false trips during burst workloads. | Use Scenario: Supplying 3.3 V/8 A to NVMe SSD controllers and PCIe switch logic in enterprise storage arrays. IC Role / Device Role / Timing Role: High-efficiency intermediate bus converter feeding downstream LDOs and DC-DCs. Use Value: 800 kHz switching enables small 0.47 µH inductors; PQFN package supports >1.5 W/cm² power density on 2-layer boards. |
| Telecom Baseband Power | Datacom Switch ASIC Core Rail |
Use Scenario: Generating 0.85 V/10 A for 5G baseband processor SoCs in outdoor macro cell units. IC Role / Device Role / Timing Role: Single-stage buck regulator operating from 12 V intermediate bus to ASIC core rail. Use Value: −40 °C to +125 °C rating ensures reliability in uncooled enclosures; pre-bias start-up avoids reset during hot-swap events. | Use Scenario: Delivering 0.95 V/14 A to multi-core packet processing ASICs in 1RU datacenter switches. IC Role / Device Role / Timing Role: High-current PoL regulator placed adjacent to ASIC BGA for minimal loop inductance. Use Value: Three PVIN pins and exposed thermal pad sustain 14 A continuous with <45 °C rise on 4-layer board; PGOOD enables sequenced power-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z | 3 A max output, 2 MHz switching, no integrated high-side FET - requires external MOSFETs | Suitable for low-power auxiliary rails; not viable for 16 A loads | Select only for sub-5 A designs where cost-per-watt outweighs integration benefits |
| TPS546B24RVFT | 18 A output, PMBus interface, 400 kHz–2 MHz programmable frequency, digital control loop | Used where telemetry, margining, or dynamic frequency scaling is required | Choose when system-level digital power management justifies added firmware and layout overhead |
Compared with MP2451DT-LF-Z and TPS546B24RVFT, the IR3888BMTRPBFAUMA1 delivers optimal balance of integration, thermal robustness, and analog simplicity for fixed-frequency, high-current industrial PoL applications-without requiring external FETs or digital infrastructure.
Availability
IR3888BMTRPBFAUMA1 is available at Aetrix Electronics and suitable for server power delivery, telecom baseband supplies, and datacom switch ASIC rails requiring stable component supply, long-term lifecycle support, and JEDEC-qualified industrial reliability.
Supply support for IR3888BMTRPBFAUMA1 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 MCUs, and industrial sensors, with global manufacturing and R&D centers.
The IR3888B belongs to Infineon's OptiMOS™ IPOL (Integrated POL) product line, designed specifically for high-current, space-constrained point-of-load applications in cloud infrastructure and communications equipment.
FAQ
What is the maximum recommended output current for IR3888BMTRPBFAUMA1?
The IR3888B is rated for 16 A continuous output current under specified thermal conditions: 2-layer PCB with 2 oz copper, 1000 mm² thermal pad area, and ambient temperature ≤60 °C. Derating applies above 60 °C ambient or with reduced copper area, per the thermal de-rating curves in Section 9 of the datasheet.
Can IR3888BMTRPBFAUMA1 operate with a 3.3 V input supply?
No - the minimum single-supply input is 4.3 V. However, with an external 3.3 V bias applied to the VCC/LDO pin, the device supports PVIN down to 2.0 V. In that configuration, VIN must be shorted to VCC/LDO, and the shared bypass capacitor must be ≥10 µF ceramic.
How does the pre-bias start-up function prevent damage during hot-insertion?
The IR3888B monitors VSNS and FB during enable assertion. If either pin detects voltage >0.2 V before soft-start begins, it enters pre-bias mode: the high-side FET remains off until the output reaches ~0.4 V, then gradually ramps up while sinking current only through the low-side FET - preventing reverse current flow into a pre-charged rail.
Is the BOOT pin internally connected to SW in IR3888BMTRPBFAUMA1?
No - BOOT is not internally connected to SW. A discrete 0.1 µF ceramic bootstrap capacitor must be placed between BOOT and SW. This capacitor charges during low-side conduction and supplies gate drive voltage for the high-side FET during its on-time, as confirmed in Figure 3 and Section 13.7 of the datasheet.
IR3888BMTRPBFAUMA1 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):
- 6V
- Current - Output:
- 25A
- Frequency - Switching:
- 600kHz ~ 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-IQFN-22-2
IR3888BMTRPBFAUMA1 FAQ
1.How can I place an order for IR3888BMTRPBFAUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3888BMTRPBFAUMA1 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 IR3888BMTRPBFAUMA1 reliable?
The price and inventory of IR3888BMTRPBFAUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3888BMTRPBFAUMA1 is usually 5 days.
3.What payment methods are accepted for IR3888BMTRPBFAUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3888BMTRPBFAUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3888BMTRPBFAUMA1?
IR3888BMTRPBFAUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3888BMTRPBFAUMA1 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 IR3888BMTRPBFAUMA1?
For technical support, including IR3888BMTRPBFAUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3888BMTRPBFAUMA1 requirements.
6.How does Aetrix verify that IR3888BMTRPBFAUMA1 is sourced from the original manufacturer or authorized distributors?
All IR3888BMTRPBFAUMA1 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 IR3888BMTRPBFAUMA1 meets industry standards.
7.What is the process for return or replacement of IR3888BMTRPBFAUMA1?
All IR3888BMTRPBFAUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with IR3888BMTRPBFAUMA1, 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 IR3888BMTRPBFAUMA1 part is unused and in its original packaging.
Return procedure for IR3888BMTRPBFAUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IR3888BMTRPBFAUMA1 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
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…
